supporting information 12 · 2018. 12. 19. · supporting information for a convenient michael...

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Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus in a continuous‐flow microreactor Li‐Hua Du * a , Zhen Dong a , Rui‐Jie Long a , Ping‐Feng Chen a , Miao Xue a and Xi‐Ping Luo* b a College of Pharmaceutical Science, ZheJiang University of Technology, Zhejiang,Hangzhou, 310014, People’s Republic of China b College of Science, Zhejiang A&F University, Zhejiang, Hangzhou, 311300, China Corresponding author. Fax: +86 571 88320903. E‐mail: [email protected]; [email protected]. Materials Unless otherwise stated, all chemicals were obtained from commercial sources and used without further purification. Lipozyme TL IM from Thermomyces lanuginosus was purchased from Novo Nordisk. Imidazole, acrylates and all other chemicals were of the highest purity commercially available and without further purification. Harvard Apparatus PHD 2000 syringe pumps were purchased from Harvard apparatus. Experimental setup The enzymatic Michael addition of imidazole derivatives with acrylates is described in Fig. 1. The micro‐flow reactor was composed of a syringe pump (Harvard Apparatus PHD 2000), reactant injector, Y‐shaped mixer, microchannel reactor and product collector. Syringe pumps were used to deliver reagents from reactant injectors to Y‐shaped mixer and then to the microchannel reactor. Reagent feed 1 (10 mL) with the imidazole derivatives in DMSO solution and reagent feed 2 (10 mL) with acrylates in DMSO solution were fully mixed in Y‐shaped mixer. Lipozyme TL IM (catalyst reactivity: 250 IUN.g ‐1 ) were filled in microchannel reactor made of a PFA reactor coil (inner diameter ID = 1.8 mm, length = 1 m). The microchannel reactor with catalyst in it was submerged into a thermostatic water bath to control the temperature. Feed 1 and 2 were mixed together at a flow rate of 7.3 µL min ‐1 in a Y‐mixer at 45 °C and the resulting stream (14.6 µL min ‐1 ) was connected to a sample vial which was used to collect the final mixture. Fig. 1 Experimental setup for Michael addition of imidazole derivatives with acrylates catalyzed by lipase TL IM in a continuous flow microreactor. Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is © The Royal Society of Chemistry 2018

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Page 1: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

Supporting Information for   

A convenient Michael addition of imidazoles to acrylates catalyzed 

by Lipozyme TL IM from Thermomyces lanuginosus in a 

continuous‐flow microreactor 

Li‐Hua Du *a, Zhen Donga, Rui‐Jie Longa, Ping‐Feng Chena, Miao Xuea and Xi‐Ping Luo*b 

aCollege of Pharmaceutical Science, ZheJiang University of Technology, Zhejiang,Hangzhou, 310014, People’s Republic of China 

b College of Science, Zhejiang A&F University, Zhejiang, Hangzhou, 311300, China ∗Corresponding author. Fax: +86 571 88320903. E‐mail: [email protected][email protected]

Materials 

Unless otherwise stated, all chemicals were obtained from commercial sources and used without further 

purification.  Lipozyme  TL  IM  from  Thermomyces  lanuginosus  was  purchased  from  Novo  Nordisk. 

Imidazole,  acrylates  and  all  other  chemicals  were  of  the  highest  purity  commercially  available  and 

without further purification. Harvard Apparatus PHD 2000 syringe pumps were purchased from Harvard 

apparatus. 

Experimental setup 

The  enzymatic Michael  addition  of  imidazole  derivatives  with  acrylates  is  described  in  Fig.  1.  The micro‐flow 

reactor  was  composed  of  a  syringe  pump  (Harvard  Apparatus  PHD  2000),  reactant  injector,  Y‐shaped  mixer, 

microchannel reactor and product collector. Syringe pumps were used to deliver reagents from reactant injectors 

to Y‐shaped mixer and then to the microchannel reactor. Reagent feed 1 (10 mL) with the imidazole derivatives in 

DMSO solution and reagent feed 2 (10 mL) with acrylates in DMSO solution were fully mixed in Y‐shaped mixer. 

Lipozyme TL IM (catalyst reactivity: 250 IUN.g‐1) were filled in microchannel reactor made of a PFA reactor coil 

(inner diameter ID = 1.8 mm, length = 1 m). The microchannel reactor with catalyst  in it was submerged into a 

thermostatic water bath to control the temperature. Feed 1 and 2 were mixed together at a flow rate of 7.3 µL 

min‐1 in a Y‐mixer at 45  °C and the  resulting stream (14.6 µL min‐1) was connected  to a  sample vial which was 

used to collect the final mixture. 

Fig. 1 Experimental setup for Michael addition of imidazole derivatives with acrylates catalyzed by lipase TL IM in a continuous flow microreactor.

Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry.This journal is © The Royal Society of Chemistry 2018

Page 2: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

General  Procedure  for  Michael  addition  reaction  in  Continuous  Flow 

Microreactors

Method B: 1.0 mmol of the imidazole derivatives was dissolved in 10 mL DMSO (feed 1, ~0.1 M) and 4.0 

mmol acrylates were dissolved in 10 mL DMSO (feed 2; ~0.4 M). Lipozyme TL IM (0.87 g) were filled in PFA 

reactor coil (inner diameter ID= 1.8 mm, length = 1m. We filled the silica gel‐loaded enzyme granules in a 

pipe by physical filling, and then filled the enzyme evenly with an ultrasonic oscillator.). Streams 1 and 2 

were mixed together at a flow rate of. 7.3 µL min‐1 in a Y‐mixer at 45 °C and the resulting stream (14.6 µL 

min‐1) was connected to a sample vial which was used to collect the final mixture. The final mixture was 

then evaporated, and the residue was submitted to column chromatography on silica gel (200‐300 mesh). 

The products were eluted with a gradient of petroleum ether /ethyl acetate (4:1, by vol). The purification 

was monitored by TLC. The fractions containing the main products were pooled, the solvent evaporated, 

and the residue analyzed by 1H NMR, 13C NMR and ESI‐MS. 

General Procedure for Michael addition reaction under Shaker Conditions. 

Method A:  imidazole derivatives  (0.25 mmol) and acrylates  (1.0 mmol) were added to 5 mL DMSO. The 

biocatalyst lipozyme TL IM (40 mg/mL, 0.20 g) was then added and the suspension maintained at 45 °C 

for 24 h under Shaker Conditions. The mixture was cooled and filtered. Then evaporated under reduced 

pressure and the residue was submitted to column chromatography on silica gel (200– 300 mesh). The 

products  were  eluted  with  a  gradient  of  normal  petroleum  ether/ethyl  acetate  (4:1,  by  vol).  The 

purification was monitored by TLC. The fractions containing the main products were pooled, the solvent 

evaporated, and the residue analyzed by 1H NMR, 13C NMR and ESI‐MS. 

Thin‐Layer Chromatography 

Analytical TLC was performed on silica gel 60 plates (Merck) using petroleum ether /ethyl acetate(2:1, by 

vol) as developing solvent. Spots were detected by ultraviolet irradiation at 254 nm. 

High Performance Liquid Chromatography (HPLC) 

The reaction was monitored by HPLC analysis using a Shim‐Pack VP‐ODS column (4.6×150 mm) and a UV 

detector (285 nm). MeOH/NaH2PO4 solution (7.5×10‐3 M) (25:75) was used as eluant at 1.0 mL min‐1 for 

imidazole  and  acrylates.  MeOH/H2O  solution  (30:70)  was  used  as  eluant  at  1.0  mL  min‐1  for 

nitroimidazole  and  acrylates.  The  yield  was  defined  as  the  ratio  between  the molar  concentration  of 

N‐substituted imidazole derivatives and the initial molar concentration of the imidazole derivatives used. 

In order to examine the reproducibility of  the method, we repeated the reaction five times,  the result 

are illustrate in Figure 2. 

 

Figure 2.The reproducibility of the reaction on the conversion of 3‐(4‐Nitroimidazol‐1‐yl)‐propionic acid 

Page 3: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

methyl ester by Lipozyme TL IM in a continuous flow microreactor. 

The reaction time is calculated in two ways: 

(1) Actual reaction time: We use the timer calculated the reaction time: the start time of the reaction 

begin  from  the  two  reaction  solution  first  contact  with  the  catalyst  in  microreactor  to  the  first 

droplet of product flow out of the tube of microreactor.   

(2) Theoretical reaction time: There is a display data on the microreactor injection pump and the data 

will  increase with  the continuous  injection.  For example, we choose a  flow rate  (0.0073 mL/min), 

when the two reaction solution first contact with the catalyst in microreactor, a data display( 0.0670 

mL ), another data is got at the time the first droplet of product flow out of the tube of microreactor 

( 0.3223 mL ). So the reaction time is: (0.3223‐0.0670)/0.0073= 34.9 min. 

We have five flow rates: 0.0127 mL/min, 0.0102 mL/min, 0.0085 mL/min, 0.0073 mL/min, 0.0064 

mL/min. From the Table 1, we can see that no matter which flow rate we test, the two data on the 

microreactor is almost the same. The Actual time and the Theoretical time are almost the same as 

well. 

Table 1   

First data (mL) 

Second data 

(mL) 

Flow rate (mL/min) 

Actual time (min) 

way 1 

Theoretical time 

(min) way 2 

0.0673  0.3220  0.0127  20  20.05 

0.0672  0.3220  0.0102  25  24.98 

0.0673  0.3222  0.0085  30  29.98 

0.0670  0.3223  0.0073  35  34.97 

0.0671  0.3225  0.0064  40  39.91 

 

Page 4: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

 

Figure 3 Mechanism of lipase catalyzed Michael addition.

 

Nuclear magnetic resonance (NMR) analysis 

After  purification  of  the  synthesized  products  by  column  chromatography,  the  chemical  structures  of 

imidazoles were determined by 1H NMR, 13C NMR and ESI‐MS. 

3‐(4‐Nitroimidazol‐1‐yl)‐propionic  acid  methyl  ester  (3a)[1].  White  solid,  mp:  109°C;  1H  NMR  (500  MHz, 

CDCl3): δ = 7.84 (d, 1H, J = 1.1 Hz, N=CHN), 7.52 (d, 1H, J = 1.1 Hz, NCH=C), 4.36 (t, 2H, J = 6.1 Hz, NCH2), 3.73 

(s,  3H,  OCH3),  2.87  (t,  2H,  J  =  6.1  Hz,  CH2C=O);  13C  NMR  (125  MHz,  CDCl3):  δ  =  170.38  (C=O),  148.71 

(C4),136.34 (C2), 119.33 (C5), 52.46 (OCH3), 43.55 (NCH2), 35.08 (CH2C=O). ESI‐MS (m/z): 200 (M+1); IR (KBr): 

3079, 3042, 1729, 1526, 1485, 1336, 1204, 1179, 1153,991, 822, 760, 656 cm‐1. 

3‐(4‐Nitroimidazol‐1‐yl)‐propionic acid ethyl ester (3b)[1]. White solid, mp: 36°C; 1H NMR (500 MHz, CDCl3): 

δ = 7.88 (d, 1H, J = 1.1 Hz, N=CHN), 7.57 (d, 1H, J = 1.1 Hz, NCH=C), 4.37 (t, 2H, J = 6.1 Hz, NCH2), 4.14 (q, 2H, 

J = 7.1 Hz, OCH2), 2.85 (t, 2H, J = 6.1 Hz, CH2C=O), 1.23 (t, 3H, J = 7.1 Hz, CH2CH3); 13C NMR(125 MHz, CDCl3): 

δ = 169.98 (C=O), 147.83 (C4), 136.46  (C2), 119.64 (C5), 61.48 (OCH2), 43.63 (NCH2), 35.18 (CH2C=O), 13.98 

(CH2CH3); ESI‐MS (m/z): 214 (M+1); IR (KBr): 3079, 2979, 1732, 1525, 1486, 1455,1339, 1201, 990, 880, 824, 

Page 5: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

654 cm‐1. 

3‐(4‐Nitroimidazol‐1‐yl)‐propionic acid butyl ester (3c)[1]. White solid, mp: 48°C; 1H NMR (500 MHz, CDCl3): 

δ = 7.88 (d, 1H, J = 1.1 Hz, N=CHN), 7.58 (d, 1H, J = 1.1 Hz, NCH=C), 4.37 (t, 2H, J = 6.1 Hz, NCH2), 4.09 (t, 2H, J 

= 6.6 Hz, OCH2), 2.86 (t, 2H, J = 6.1 Hz, CH2C=O), 1.57 (m, 2H, CH2CH2CH2), 1.31 (m, 2H, CH2CH2CH3), 0.89 (t, 

3H, J = 7.4 Hz, CH2CH3); 13C NMR (125 MHz, CDCl3): δ = 170.08 (C=O), 147.82 (C4), 136.45 (C2), 119.62 (C5), 

65.36  (OCH2),  43.66  (NCH2),  35.16  (CH2C=O),  30.37  (CH2CH2CH2),  18.92  (CH2CH3),  13.50  (CH2CH3);  ESI‐MS 

(m/z): 242 (M+1); IR (KBr): 2963, 1727, 1524, 1488, 1338, 1296, 1205, 990, 880, 823, 655 cm‐1. 

3‐(4‐Nitroimidazol‐1‐yl)‐propionic  acid  tert‐butyl  ester  (3d)[1]. White  solid, mp:  50°C;  1H NMR  (500 MHz, 

CDCl3): δ = 7.83 (d, 1H, J = 1.1 Hz, N=CHN), 7.51 (d, 1H, J = 1.1 Hz, NCH=C), 4.31 (t, 2H, J = 6.1 Hz, NCH2), 2.76 

(t, 2H, J = 6.1 Hz, CH2C=O), 1.43 (s, 9H, C(CH3)3); 13C NMR (125 MHz, CDCl3): δ = 169.12 (C=O), 147.71 (C4), 

136.34 (C2), 119.38 (C5), 82.51 (OC(CH3)3), 43.83 (NCH2), 36.37 (O=CCH2), 27.97 (C(CH3)3); ESI‐MS (m/z): 242 

(M+1); IR (KBr): 2976, 1728, 1526, 1486, 1342, 1167, 991, 882, 824, 759, 654 cm‐1. 

3‐(2‐Methyl‐4‐nitroimidazol‐1‐yl)‐propionic  acid  methyl  ester  (3f)[2].  Syrupy  liquid;  1H  NMR  (500  MHz, 

CDCl3): δ = 7.75  (s,  1H, NCH=C), 4.23  (t,  2H,  J  = 6.4 Hz, NCH2), 3.66  (s,  3H, OCH3), 2.81  (t,  2H,  J  =  6.4 Hz, 

CH2C=O), 2.43 (s, 3H, N=CCH3); 13C NMR (125 MHz, CDCl3): δ = 170.21 (C=O), 146.35 (C4), 144.81 (C2), 119.82 

(C5), 52.20 (OCH3), 42.24 (NCH2), 34.25 (CH2C=O), 12.87 (N=CCH3); ESI‐MS (m/z): 214(M+1); IR (KBr): 3104, 

1737, 1540, 1496, 1329, 1212, 1145, 997, 848, 826, 758, 677, 561 cm‐1. 

3‐(2‐Methyl‐4‐nitroimidazole‐1‐yl)‐propionic  acid  Ethyl  ester  (3g)[2].  Syrupy  liquid;  1H  NMR  (500  MHz, 

Page 6: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

CDCl3): δ = 7.74 (s, 1H, NCH=C), 4.20 (t, 2H, J = 6.4 Hz, NCH2), 4.07 (q, 2H, J = 7.1 Hz, OCH2), 2.77 (t, 2H, J = 

6.4 Hz, O=CCH2), 2.40 (s, 3H, N=CCH3), 1.16 (t, 3H, J = 7.1 Hz, CH2CH3). 13CNMR (125 MHz, CDCl3): δ = 169.71 

(C=O), 146.21  (C4), 144.77  (C2), 119.87  (C5), 61.24  (OCH2), 42.23  (NCH2), 34.40  (O =CCH2), 13.82  (N=CCH3), 

12.79 (CH2CH3). ESI–MS (m/z): 228 (M + 1); IR (KBr): 3142, 2991, 1729, 1537, 1500, 1408, 1322, 1292, 1202, 

1024, 945, 826, 805, 754, 556 cm‐1. 

3‐(2‐Methyl‐4‐nitroimidazole‐1‐yl)‐propionic acid butyl ester  (3h)[2]. Hazel  columnar  crystal, mp: 41°C;  1H 

NMR (500 MHz, CDCl3): δ = 7.69 (s, 1H, NCH=C), 4.14 (t, 2H, J = 6.4 Hz, NCH2), 3.92 (t, 2H, J = 6.7 Hz, OCH2), 

2.71 (t, 2H, J = 6.4 Hz, O=CCH2), 2.31 (s, 3H, N=CCH3), 1.41 (m, 2H, CH2CH2CH2), 1.14 (m, 2H, CH2CH3), 0.72 (t, 

3H, J = 7.4 Hz, CH2CH3). 13CNMR (125 MHz, CDCl3): δ = 169.95 (O=C), 146.08 (C4), 144.91 (C2), 120.11 (C5), 

65.02  (OCH2),  42.32  (NCH2),  34.37  (O=CCH2),  30.24  (OCH2CH2),  18.77  (CH2CH3),  13.35  (N=CCH3),  12.76 

(CH2CH3). ESI–MS (m/z): 256 (M + 1); IR (KBr): 3102, 2963, 2937, 1729, 1542, 1505, 1415, 1325, 1292, 1209, 

1146, 999, 826, 758, 562 cm‐1. 

3‐(2‐Methyl‐4‐nitroimidazole‐1‐yl)‐propionic acid tert‐butyl ester (3i). Hazel columnar crystal, mp: 45°C; 1H 

NMR (500 MHz, CDCl3): δ = 7.75(s, 1H, NCH=C), 4.18 (t, 2H, J = 6.4 Hz, NCH2), 2.71 (t, 2H, J = 6.4 Hz, O=CCH2), 

2.45 (s, 3H, N=CCH3), 1.40 (s, 9H, C(CH3)3). 13C NMR (125 MHz, CDCl3): δ = 168.95 (O=C), 146.11 (C4), 144.77 

(C2), 119.74 (C5), 82.35 (OC(CH3)3), 42.56 (NCH2), 35.70 (O=CCH2 ), 27.90 (OC(CH3)3), 13.01 (N=CCH3). ESI–MS 

(m/z): 256 (M + 1); IR (KBr): 3109, 2979, 1727, 1537, 1499, 1415, 1318, 1290, 1143, 999, 828, 758 cm‐1. 

Page 7: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

3‐(6‐nitro‐benzimidazole‐1‐yl)‐propionic  acid  methyl  ester  and  3‐(5‐nitro‐benzimidazole‐1‐yl)‐propionic 

acid methyl ester (3p). Yellow oil; 1H NMR (500 MHz, CDCl3): δ = 8.71 (d, 1H, J = 2.0 Hz, Ar‐H), 8.40 (d, 1H, J = 

2.0 Hz, Ar‐H), 8.27‐8.20 (m, 4H, Ar‐H), 7.87 (d, 1H, J = 8.9 Hz, Ar‐H), 7.50 (d, 1H, J = 8.9 Hz, Ar‐H), 4.60 (m, 4H, 

NCH2),  3.69  (s,  6H, OCH3),  2.94  (m, 4H, O=CCH2);  13C NMR  (125 MHz, CDCl3): δ = 170.71,  147.97,  146.78, 

143.99, 143.90, 143.09, 137.54, 132.77, 120.66, 118.96, 118.19, 117.25, 109.45, 106.47, 52.32, 40.82, 40.77, 

34.09. ESI–MS (m/z): 250 (M + 1);  IR  (KBr): 2957, 1726, 1519, 1435, 1340, 1205, 1176, 980, 935, 788, 739 

cm‐1. 

3‐(6‐nitro‐benzimidazole‐1‐yl)‐propionic acid Ethyl ester and 3‐(5‐nitro‐benzimidazole‐1‐yl)‐propionic acid 

Ethyl ester (3q). yellow oil; 1H NMR (500 MHz, CDCl3): δ = 8.52 (d, 1H, J = 2.1 Hz, Ar‐H), 8.32 (d, 1H, J = 2.1 Hz, 

Ar‐H), 8.24 (s, 1H, Ar‐H), 8.16 (s, 1H, Ar‐H), 8.06 (m, 2H, Ar‐H), 7.72 (d, 1H, J = 8.9 Hz, Ar‐H), 7.45 (d, 1H, J = 

8.9 Hz, Ar‐H) 4.54 (m, 4H, NCH2), 4.02 (m, 4H, OCH2), 2.87 (m, 4H, O=CCH2), 1.10 (m, 6H, OCH2CH3); 13C NMR 

(125  MHz,  CDCl3):  δ  =  170.20,  147.59,  146.68,  145.78,  144.28,  144.05,  141.75,  137.25,  132.47,  119.98, 

119.16, 118.73, 116.67, 109.90, 106.99, 61.45, 41.20, 34.25, 13.99. ESI–MS (m/z): 264 (M + 1); IR (KBr): 3095, 

2976, 1716, 1510, 1337, 1295, 1199, 1167, 1061, 1013, 889, 824, 740 cm‐1. 

 

 

3‐(6‐nitro‐benzimidazole‐1‐yl)‐propionic acid Butyl ester and 3‐(5‐nitro‐benzimidazole‐1‐yl)‐propionic acid 

Butyl ester (3r)[3]. Yellow oil; 1H NMR (500 MHz, CDCl3): δ = 8.89 (s, 1H, Ar‐H), 8.75 (d, 1H, J = 2.0 Hz, Ar‐H), 

8.63 (s, 1H, Ar‐H), 8.51 (d, 1H, J = 2.0 Hz, Ar‐H), 8.30 (m, 2H, Ar‐H), 7.96 (d, 1H, J = 8.9 Hz, Ar‐H), 7.60 (d, 1H, J 

Page 8: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

= 8.9 Hz, Ar‐H), 4.68 (m, 4H, NCH2), 4.07 (m, 4H, OCH2), 2.98 (m, 4H, O=CCH2), 1.67 (m, 4H, OCH2CH2), 1.28 

(m, 4H, CH2CH3), 0.90  (t,  J  =  7.2 Hz, 6H, CH2CH3);  13C NMR (125 MHz, CDCl3): δ = 170.36,  147.35,  146.57, 

144.30, 140.94, 137.04, 132.28, 119.71, 119.44, 119.21, 116.49, 110.17, 107.28, 65.43, 41.39, 34.25, 30.40, 

18.97, 13.58. ESI–MS (m/z): 292 (M + 1);  IR  (KBr): 3436, 3093, 1725, 1518, 1435, 1384, 1341, 1206, 1176, 

788, 739 cm‐1. 

N

NO

OO2N

N

N O

O

O2N

3‐(6‐nitro‐benzimidazole‐1‐yl)‐propionic acid tert‐butyl ester and 3‐(5‐nitro‐benzimidazole‐1‐yl)‐propionic 

acid tert‐butyl ester (3s). Yellow oil; 1H NMR (500 MHz, CDCl3): δ = 8.72 (d, 1H, J = 2.0 Hz, Ar‐H), 8.42 (d, 1H, 

J = 2.0 Hz, Ar‐H), 8.29‐8.21 (m, 4H, Ar‐H), 7.88 (d, 1H, J = 8.9 Hz, Ar‐H), 7.51 (d, 1H, J = 8.9 Hz, Ar‐H), 4.55 (m, 

4H, NCH2), 2.84  (m, 4H, O=CCH2), 1.39  (s, 18H, OC(CH3)3);  13C NMR (125 MHz, CDCl3): δ = 169.48, 147.91, 

146.77,  143.98,  142.94,  137.57,  132.78,  120.53,  118.90,  118.21,  117.17,  109.61,  106.65,  82.28,    82.25, 

41.09, 41.03, 35.46, 35.39, 27.96. ESI–MS (m/z): 292 (M + 1); IR (KBr): 2978, 1725, 1517, 1371, 1345, 1231, 

1157, 1061, 884, 843, 796, 741 cm‐1. 

 

Page 9: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3a 

Page 10: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3a 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 11: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3b 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 12: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3b 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 13: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3c 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 14: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3c 

 

 

 

 

 

 

 

 

 

 

 

 

Page 15: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3d 

 

 

 

 

 

 

Page 16: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3d 

Page 17: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3f 

N

NO2N

O

O

Page 18: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3f 

 

 

 

Page 19: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3g 

 

 

Page 20: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3g 

 

 

Page 21: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3h

 

Page 22: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3h 

 

Page 23: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3i

Page 24: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3i 

Page 25: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3p 

 

Page 26: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3p 

N

NO

O

N

N O

OO2N

O2N

 

Page 27: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3q 

Page 28: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3q 

Page 29: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3r 

Page 30: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3r 

Page 31: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

1H‐NMR of compound 3s 

Page 32: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

13C‐NMR of compound 3s 

Page 33: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

The Mass spectrum of compound 

compound 3a 

 

compound 3b 

 

Page 34: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3c 

 

compound 3d 

 

 

Page 35: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3f 

 

compound 3g 

 

Page 36: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3h 

 

compound 3i 

Page 37: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3i 

 

compound 3p 

 

Page 38: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3q 

 

compound 3r 

 

Page 39: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3s 

 

The IR spectra of compound 

compound 3a 

656.

12759.

618

22.

70

83

9.9

888

7.10

932.

7796

5.81

990.

6810

43.9

810

57.5

3

1153

.31

1178

.74

1204

.54

123

2.2

91

262

.37

1295

.33

13

36.2

31

365

.17

138

8.6

814

06.5

91

42

3.0

514

41.8

114

84.8

81

526

.38

1544

.02

172

8.4

8

2957

.81

30

42.2

53

079

.28

31

37.1

9

34

49.8

0

40

45

50

55

60

65

70

75

80

85

90

95

100

%T

500 1000 1500 2000 2500 3000 3500 4000

Wavenumbers (cm-1)

Page 40: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3b 

compound 3c 

653

.89

759.

20

823

.58

854

.33

879

.98

941.

20

98

9.8

81026

.75

10

43.6

01

06

4.3

21111

.38

115

5.8

011

79.

56

1201

.47

123

1.1

612

63.1

31

292

.47

1301

.14

1339

.42

13

76.7

313

93.8

314

06.2

81

42

3.7

714

55.1

01

48

6.0

81

525

.04

1543

.75

173

1.7

2

295

5.9

92

978

.61

307

8.5

531

36.

78

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

654.

77

758.

12

822.

80

88

0.2

9

927.

8795

5.22

989.

51

1064

.24

1154

.30

1177

.72

1204

.70

1230

.10

12

59.1

812

95.6

413

38.

40

13

55.0

913

90.6

51

407

.10

145

0.4

114

87.5

615

24.

87

15

43.7

6

172

7.1

6

2874

.78

2962

.77

30

24.7

830

51.

12

3079

.53

0

10

20

30

40

50

60

70

80

90

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

Page 41: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3d 

 

compound 3f 

654

.01

758.

64

823

.7684

7.01

882.

97

943.

05

991

.05

104

4.6

9

1166

.70

1215

.65

1231

.9712

63.4

71

30

1.0

113

42.4

013

61.9

71382

.44

13

92.5

614

07.5

91

452

.38

14

85.

67

1526

.381

545

.52

172

7.4

9

293

0.5

429

76.

3930

56.4

630

80.

48

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

56

0.6

9

615.

64

67

6.79

74

2.9

37

57.

74

825.

7784

8.42

946.

5796

2.35

997.

0510

42.1

2

1145

.38

11

81.

51

1212

.32

1264

.33

1294

.17

132

9.0

2137

4.5

91

398

.39

1411

.89

144

1.5

614

65.5

914

95.

62

15

39.7

4

169

2.4

717

37.

07

296

2.0

93006

.52

3064

.55

31

04.

45

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

Page 42: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3g 

compound 3h 

407

22

507.

17

556.

67

61

3.6

7

67

7.0

3

740.

8075

3.9

7

805

.19

82

5.6

58

59.

41

891

.63

945.

22

995.

7610

23.

95

10

42.9

310

56.5

6

1131

.53

114

2.2

61

201

.93

1257

.73

1292

.01

1322

.21

1350

.71

14

08.

09

144

5.5

81

465

.01

1477

.52

1500

.05

15

36.8

016

09.6

4

168

7.1

017

28.

91

2910

.36

294

1.4

829

90.5

2

31

42.0

1

0

10

20

30

40

50

60

70

80

90

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

510.

52

56

2.3

1

66

9.89

745

.73

757.

71

825

.85

858

.37

89

0.06

928.

8894

8.77

998.

6310

20.

13

10

62.

51

114

6.3

112

09.3

512

32.1

312

65.

16

12

92.4

913

25.3

813

58.7

31

393

.99

14

14.7

114

64.3

71

50

5.3

815

42.

51

172

8.4

2

287

5.6

72

936

.91

2962

.92

3034

.84

306

6.9

931

01.

52

-0

10

20

30

40

50

60

70

80

90

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

Page 43: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3i 

compound 3p 

 

75

7.54

827.

75844

.4788

3.8

2

946.

87

998.

74

1142

.751

158

.71

1224

.90

1261

.80

1290

.08

1317

.65

1365

.90

1377

.06

1398

.11

1415

.95

1441

.40

14

55.7

014

63.5

914

98.6

11

537

.03

1633

.55

1644

.59

1651

.10

1660

.30

1682

.13

1698

.67

1727

.73

2978

.69

3109

.14

3436

.93

55

60

65

70

75

80

85

90

95

100

%T

800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

62

0.53

635

.36

71

2.6

37

38.

94

76

5.87

788

.0680

8.4

68

20.

21

829

.26

84

6.29

876

.99

889

.11

89

8.41

93

5.5

195

8.3

19

80.

10

10

52.7

810

62.

99

110

8.3

311

35.2

21

176

.23

12

05.8

012

51.

76

1288

.55

134

0.4

81

372

.90

138

5.0

31

416

.54

14

35.

52

1455

.53

146

9.3

514

94.

49

151

8.9

4

159

3.2

316

19.0

716

33.5

816

44.6

51

651

.21

16

67.

75

168

2.3

21

69

8.8

017

25.

46

285

1.4

329

23.

54

295

7.1

53

09

3.0

3

344

4.2

83

56

3.9

2

38

50.

65

64

66

68

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

Page 44: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3q 

 

compound 3r 

 

42

7.1

159

1.0

56

21

.30

63

8.1

6

73

9.6

47

64

.14

79

1.9

98

23

.96

83

3.3

38

50

.58

86

0.2

08

89

.30

90

8.7

99

38

.16

98

3.3

01

01

3.3

11

05

1.3

31

06

0.7

61

09

3.1

41

11

4.6

41

13

3.9

51

16

7.1

81

19

9.1

21

25

8.5

01

29

4.5

31

33

7.4

31

38

3.2

51

39

5.6

01

41

2.6

91

44

5.4

21

46

6.8

31

51

0.1

1

15

92

.12

16

17

.71

17

15

.701

73

0.9

1

29

34

.54

29

76

.65

30

95

.45

31

21.

91

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

73

9.0

178

8.3

382

0.2

18

29

.35

84

6.3

48

77

.07

88

9.0

98

98

.52

935

.589

58

.42

980

.30

10

52

.82

10

63

.12

11

08

.27

11

35

.50

11

76.3

51

20

6.3

31

25

1.8

21

288

.44

13

40

.55

13

84

.45

14

16

.50

14

35

.60

14

55

.42

14

69

.361

49

4.5

21

518

.96

15

93

.32

16

19

.411

63

3.4

61

64

4.4

81

65

1.1

01

682

.01

16

98

.80

17

25

.20

29

23

.98

29

57

.55

30

93

.26

34

36

.24

35

84.5

93

59

2.4

63

625

.90

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)

Page 45: Supporting Information 12 · 2018. 12. 19. · Supporting Information for A convenient Michael addition of imidazoles to acrylates catalyzed by Lipozyme TL IM from Thermomyces lanuginosus

compound 3s 

 

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74

0.7

47

63

.36

79

6.1

98

20

.54

84

3.8

1

88

4.4

790

8.9

693

6.4

8

98

6.0

2

10

61

.65

11

57

.07

12

30

.85

12

90

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13

45

.34

13

70

.70

13

88

.92

14

09

.89

14

43

.10

14

68

.941

49

3.9

115

16.

55

15

90

.53

16

17

.94

17

25

.05

29

77

.9630

66

.60

31

01

.65

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

%T

600 800 1000 1000 1500 2000 3000

Wavenumbers (cm-1)