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Ynone Preparation and ApplicationsRACHEL WHIT TAKER
DONG GROUP L ITERATURE TALK
OCTOBER 1, 2014
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OverviewBackground and History
Synthesis of Ynones Metal Acetylides
Transition Metal Catalysis
Others
Applications of Ynones Cyclizations
Use in Total Synthesis
Others
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Why Do We Care?Due to unsaturation and instability, ynones are easily cyclized in a variety of interesting ways
These cyclized products often have interesting biological activity, either as natural products or med chem analogs
Quick and facile construction of complicated molecules always welcome
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First Example:Nef showed first example in 1899 using sodium acetylide
Very violent reaction and only worked on small scales
Nef’s example set the stage for various metal acetylides to add into anhydrides, aldehydes, and other carbonyl compounds
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Nef, J.U.; Liebig’s Ann. 1899, 264.
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Anhydrides/Aldehydes-GrignardsAnhydrides (in large excess) at low temperatures showed formation of ynones directly
Aldehydes with Grignard reagents discovered to give easily oxidizable proparglic alcohols
5
Kroeger, J.W., Niruwland, J.A., J. Am. Chem. Soc., 1936, 58, 1861.Jones, E.R.H, Skattebol, L., Whiting, M.C., J. Chem. Soc., 1956, 4765.
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Acyl Chlorides With Copper or ZincCopper acetylides with acyl chlorides allowed for more freedom than anhydrides
Zinc can also be utilized
6
Vereshchagin, L.I., Yashina, O.G., Zarva, T.V., Zh. Org. Khim., 1996, 2, 1895.Yuan, H., Shen, Y., Yu, S., Shan, L., Sun, Q., Zhang, W., Synth. Commun., 2013, 43, 2817.
Logue, M.W., Moore, G.L., J. Org. Chem., 1975, 40, 131.
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Acyl Chlorides With Tin or SilverTin acetylides can be coupled with acyl chlorides in the presence of a palladium catalyst
Silver could also be utilized
7
Logue, M.W., Teng, K., J. Org. Chem., 1982, 47, 2549.
Davis, R.B., Scheiber, D.H., J. Am. Chem. Soc., 1956, 78, 1675.
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Weinreb Amides
8
Nahm, S., Weinreb, S.M., Tetrahedron Lett., 1981, 22, 3815.
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Morpholine Amides
9
Jackson, M.M., Leverett, C., Toczko, J.F., Roberts, J.C., J. Org. Chem., 2002, 67, 5032.
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Benzotriazole Esters
10Morales-Serna, J.A., Sauza, A., Padron de Jesus, G., Gavino, R., Garcia de la Mora, G., Cardenas, J., Tetrahedron Lett., 2013, 54, 7111.
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Benzotriazole Esters
11
Morales-Serna, J.A., Sauza, A., Padron de Jesus, G., Gavino, R., Garcia de la Mora, G., Cardenas, J., Tetrahedron Lett., 2013, 54, 7111.
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Transition Metal Catalysis…PalladiumFirst example by Tanaka in 1981
Little byproduct observed (<1%)
Several aryl and alkenyl halides tolerated
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Kobayashi, T., Tanaka, M., J. Chem. Soc. Chem. Comm., 1981, 333.
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Variations on Carbonylative SongashiraUse of dilute ammonia can reduce the need to use amines as solvents and high pressures of CO Rarely saw any Songashira byproduct
Can also use acyl chlorides without CO
13
Mohamed Ahmed, M.S., Mori, A., Org. Lett., 2003, 5, 3057.
Palimkar, S.S., Kumar, P.H., Jogdand, N.R., Daniel, T., Lahoti, R.J., Srinivasan, K.V., Tetrahedron Lett., 2006, 47, 5527.
R, R’= Aryl and alkyl Yields: 40-95%
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Variations on Carbonylative SongashiraRecently, scope has been expanded to include aryl triflates
14
Wu, X.-F., Sundararaju, B., Neumann, H., Dixneuf, P.H., Beller, M., Chem. Eur. J., 2011, 17, 106.
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N-Heterocyclic Ynone Synthesis
15
Boersch, C., Merkul, E., Muller, T.J.J., Angew. Chem. Int. Ed., 2011, 50, 10448.
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Palladium/hν-Alkyl Halides Possible
16
Fusano, A., Fukuyama, T., Nishitani, S., Inouye, T., Ryu, I., Org. Lett., 2010, 12, 2410.
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Palladium Free-Cu(I) Catalyzed
17
Mohammadi, E., Movassagh, B., Navidi, M., Helvetica Chimica Acta, 2014, 97, 70.
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Lewis Acid Catalysis-Organotrifluoroborate Salts
18
Taylor, C., Bolshan, Y., Org. Lett., 2014, 16, 488.
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Oxidative MethodsChromium first found to oxidize alkynes (Harsh!)
Williams found more mild conditions
More recently, rhodium in the presence of water was found to work
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Li, P., Fong, W.M., Chao, L.C.F., Fung, S.H.C., Williams, I.D., J. Org. Chem., 2001, 66, 4087.
Shaw, J.E., Sherry, J.J., Tetrahedron Lett., 1971, 4379.
McLaughlin, E.C., Doyle, M.P., J. Org. Chem., 2008, 73, 4317.
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Oxidative Methods-Oxidative C-C Bond Cleavage of Aldehydes
20
Wang, Z.; Li, L.; Huang, Y.; J. Am. Chem. Soc. 2014, 136, 12233.
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“Green” Methods-Recyclable Copper Nanoparticles
21
Sun, W., Wang, Y., Wu, X., Yao, X., Green Chem., 2013, 15, 2356.
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Applications of YnonesCyclization Methodologies
Use in Total Synthesis (Generally through Cyclizations)
Others Applications
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Furan Formation
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First reported with palladium in 1986
Later reported with copper, rhodium, and even acids
Sheng, H., Lin, S., Huang, Y.Z., Tetrahedron Letters, 1986, 27, 4893.Kel’in, A., Gevorgyan, V., Journal of Organic Chemistry, 2002, 67, 95.
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Bicyclic Alkenes to Furans
24
Ge, G-C., Mo, D-L., Ding, C-H., Dai, L-X., Hou, X-L., Org. Lett., 2012, 14, 5756.
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Asymmetric Synthesis of Dihydropyranones
25
Shi, S-L., Kanai, M., Shibasaki, M., Angew. Chem., Int. Ed., 2012, 51, 3932.
CuOR = CuOCH2CF3 (3-5 mol%)ROH = CF3CH2OH
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Tetrahydroxanthones are xanthone derivatives that have proved difficult to synthesize, but show interesting biological properties
DMAP-Promoted Formation of THX
26
Castillo-Contreras, E.B., Dake, G.R., Org. Lett., 2014, 16, 1642.
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1,3 Transposition With Gold
27Shiroodi, R.K., Soltani, M., Gevorgyan, V., J. Am. Chem. Soc., 2014, 136, 9882.
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1,3 Transposition With Gold
28
Shiroodi, R.K., Soltani, M., Gevorgyan, V., J. Am. Chem. Soc., 2014, 136, 9882.
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Pyrrolin-4-onesUriac showed gold catalysis could allow for quick synthesis under mild conditions
29
Gouault, N., Le Roch, M., Cornee, C., David, M., Uriac, P., J. Org. Chem., 2009, 74, 5614.
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Enantiopure Pyrrolidine from γ-Amino-ynones
30
Vu, H-D., Renault, J., Roisnel, T., Gouault, N., Uriac, P., Eur. J. Org. Chem., 2014, 4506.
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1,3 Dipolar Cycloaddtion to Pyrroles
31
Wang, Z., Shi, Y., Luo, X., Han, D-M., Deng, W-P., New J. Chem., 2013, 37, 1742.
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Metal-Free Synthesis Pyrroles
32
Shen, J., Cheng, G., Cui, X., Chem. Commun., 2013, 49, 10641.
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[4+2] With Cyclic N-Sulfimines
33
Liu, Y., Kang, T-R., Liu, Q-Z., Chen, L-M., Wang, Y-C., Liu, J., Xie, Y-M., Yang, J-L., He, L., Org. Lett., 2013, 15, 6090.
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1,3 Cycloaddition With Ohira-Bestmann
34Pramanik, M.M.D., Kant, R., Rastogi, N., Tetrahedron, 2014, 70, 5214.
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Click Chemistry
35
Hwang, S., Bae, H., Kim, S., Kim, S., Tetrahedron, 2012, 68, 1460.
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Click Chemistry
36Hwang, S., Bae, H., Kim, S., Kim, S., Tetrahedron, 2012, 68, 1460.
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1,4 Oxazepines/1,3-Oxazines
37
Francois-Endelmond, C., Carlin, T., Thuery, P., Loreau, O., Taran, F., Org. Lett., 2010, 12, 40.
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[3+2] Annulations
38
Lian, Z., Shi, M., Eur. J. Org. Chem., 2012, 581.Yang, L., Xie, P., Li, E., Li, X., Hunag, Y., Chen, R., Org. Biomol. Chem., 2012, 10, 7628.Zhou, Q-F., Chu, X-P., Ge, F-F., Li, C., Lu, T., Mol. Divers., 2013, 17, 563.
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[3+2] Annulations
39
Lian, Z., Shi, M., Eur. J. Org. Chem., 2012, 581.Yang, L., Xie, P., Li, E., Li, X., Hunag, Y., Chen, R., Org. Biomol. Chem., 2012, 10, 7628.Zhou, Q-F., Chu, X-P., Ge, F-F., Li, C., Lu, T., Mol. Divers., 2013, 17, 563.
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Amino Enyne Catalysis to Spirooxindoles
40
Ramachary, D.B., Venkaiah, C., Madhavachary R., Org. Lett. 2013, 15, 3042.
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5-Membered Spirooxindoles via Tomita ZipperInspiration from existing intramolecular cyclizations
41
Ramachary, D.B., Venkaiah, C., Krishna, P.M., Org. Lett., 2013, 15, 4714.
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Beetle Sex PheromoneSynthesized by Nguyen is the early 1980’s
42
Midland, M.M., Nguyen, N.H., J. Org. Chem., 1981, 46, 4107.
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Synthesis of 5-(Acylethynyl)uracilsSubstituted uracil derivatives can function as enzyme inhibitors
43
Kundu, N.G.; Chaudhuri, L.N.; J. Chem. Soc. Perkin Trans. 1, 1991, 1677.Kundu, N.G.;Dasgupta, S.K.; J. Chem. Soc. Perkin Trans. 1, 1993, 2657.
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Synthesis of 5-(Acylethynyl)uracilsSubstituted uracil derivatives can function as enzyme inhibitors
44
Kundu, N.G.; Chaudhuri, L.N.; J. Chem. Soc. Perkin Trans. 1, 1991, 1677.Kundu, N.G.;Dasgupta, S.K.; J. Chem. Soc. Perkin Trans. 1, 1993, 2657.
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Total Synthesis of Spirobacillene A
45
Unsworth, W.P., Cuthbertson, J.D., Taylor, R.J.K., Org. Lett., 2013, 15, 3306.
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Spirobacillene A-Key Step!
46
Unsworth, W.P., Cuthbertson, J.D., Taylor, R.J.K., Org. Lett., 2013, 15, 3306.
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Cascade Cyclization Toward Phomactin A
47
Ciesielski, J., Gandon, V., Frontier, A.J., J. Org. Chem., 2013, 78, 9541.
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Cascade Cyclization Toward Phomactin A
48
Ciesielski, J., Gandon, V., Frontier, A.J., J. Org. Chem., 2013, 78, 9541.
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Synthesis of Xanthofulvin
49
Axelrod, A., Eliasen, A.M., Chin, M.R., Zlotkowski, K., Siegel, D., Angew. Chem., Int. Ed., 2013, 52, 3421.
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Meridianins Syntheses
50Karpov, A.S., Merkul, E., Rominger, F., Muller, T.J.J., Angew. Chem., Int. Ed., 2005, 44, 6951.
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Aldol Condensation to Trocheliophorolide B
51
Trost, B.M., Quintard, A., Org. Lett., 2012, 14, 4698.
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Cladospolide B-D
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Xing, Y., O’Doherty, G.A., Org. Lett., 2009, 11, 1107.
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Other Applications-StereodefinedTrisubstituted Olefin Synthesis
53
Kabalka, G.W., Yu, S., Li, N., Lipprandt, U., Tetrahedron Lett., 1999, 40, 37.
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Enantioselective ReductionDirect formation of chiral propargylic alcohols
54
Helal, C.J., Magriotis, P.A., Corey, E.J., J. Am. Chem. Soc., 1996, 118, 10938.
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Decarbonylation!Mueller demonstrated stoichiometric reaction
Our group has made the transformation catalytic
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Muller, E., Tetrahedron Letters, 1969, 1129.Mueller, E. Justus Liebigs Ann. Chem.1973, 9, 1583.
Dermenci, A., Whittaker, R.E., Dong, G. Organic Letters, 2013, 15, 2242.
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ConclusionsYnones have a rich history Have been synthesized in a variety of ways
Mostly through carbonylative Songashira or metal acetylide addition
Ynones are prime candidates for a variety of cyclization reactions This makes them interesting starting materials and intermediates for both natural product synthesis and
methodology
Very popular motifs in the literature
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Thanks!Any questions or comments?
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