51
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Romano C, Jia M, Monari M, Manoni E, Bandini M. Metal-free enantioselective electrophilic activation of allenamides: stereoselective dearomatization of indoles. Angew Chem Int Ed Engl 2014; 53:13854-7. [PMID: 25346494 DOI: 10.1002/anie.201407518] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 09/18/2014] [Indexed: 11/11/2022]
Abstract
The effective and unprecedented chiral BINOL phosphoric acid catalyzed (1-10 mol%) dearomatization of indoles through electrophilic activation of allenamides (ee up to 94%), is documented. Besides the synthesis of 3,3-disubstituted indolenine cores, a dearomatization/hydrogen transfer cascade sequence is also presented as a new synthetic shortcut toward highly enantiomerically enriched indolines.
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Affiliation(s)
- Ciro Romano
- Department of Chemistry "G. Ciamician", Alma Mater Studiorum, University of Bologna via Selmi 2, 40126 Bologna (Italy) http://www.mbandini-group.com
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52
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Romano C, Jia M, Monari M, Manoni E, Bandini M. Metal-Free Enantioselective Electrophilic Activation of Allenamides: Stereoselective Dearomatization of Indoles. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407518] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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53
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Li Y, Cao L, Luo X, Deng WP. The synthesis of 1,2-diarylindenes via DDQ-mediated dehydrogenative intramolecular cyclization. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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54
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Slater NH, Brown NJ, Elsegood MRJ, Kimber MC. The Au(I) Catalyzed Activation of Allenamides and Their Subsequent Transformation into Chromanes: A Method for the Regiocontrolled Addition to the α- and γ-Positions of the Allene Unit. Org Lett 2014; 16:4606-9. [DOI: 10.1021/ol502178v] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Natasha H. Slater
- Department of Chemistry, Loughborough University, Leicestershire, LE11 3TU, U.K
| | - Natalie J. Brown
- Department of Chemistry, Loughborough University, Leicestershire, LE11 3TU, U.K
| | - Mark R. J. Elsegood
- Department of Chemistry, Loughborough University, Leicestershire, LE11 3TU, U.K
| | - Marc C. Kimber
- Department of Chemistry, Loughborough University, Leicestershire, LE11 3TU, U.K
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55
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William R, Wang S, Ding F, Arviana EN, Liu XW. Interrupted Imino-Nazarov Cyclization of 1-Aminopentadienyl Cation and Related Cascade Process. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405251] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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56
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William R, Wang S, Ding F, Arviana EN, Liu XW. Interrupted Imino-Nazarov Cyclization of 1-Aminopentadienyl Cation and Related Cascade Process. Angew Chem Int Ed Engl 2014; 53:10742-6. [DOI: 10.1002/anie.201405251] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 06/23/2014] [Indexed: 11/07/2022]
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57
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Jia M, Cera G, Perrotta D, Monari M, Bandini M. Taming gold(I)-counterion interplay in the de-aromatization of indoles with allenamides. Chemistry 2014; 20:9875-8. [PMID: 25044346 DOI: 10.1002/chem.201403155] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Indexed: 11/10/2022]
Abstract
A careful interplay between the π electrophilicity of a cationic Au(I) center and the basicity of the corresponding counterion allowed for the chemo- and regioselective inter- as well as intramolecular de-aromatization of 2,3-disubstituted indoles with allenamides. The silver-free bifunctional Lewis acid/Brønsted base complex [{2,4-(tBu)2C6H3O}3PAuTFA] assisted the formation of a range of densely functionalized indolenines under mild conditions.
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Affiliation(s)
- Minqiang Jia
- Department of Chemistry "G. Ciamician", Alma Mater Studiorum - University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
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58
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Abstract
This review discusses novel Nazarov cyclization variations and their application to the synthesis of complex molecules.
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Affiliation(s)
- Martin J. Di Grandi
- Department of Natural Sciences
- Fordham University at Lincoln Center
- New York, USA
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59
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60
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You X, Xie X, Sun R, Chen H, Li S, Liu Y. Titanium-mediated cross-coupling reactions of 1,3-butadiynes with α-iminonitriles to 3-aminopyrroles: observation of an imino aza-Nazarov cyclization. Org Chem Front 2014. [DOI: 10.1039/c4qo00159a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ti(OiPr)4/2 nBuLi-mediated highly efficient cross-coupling reactions of 1,3-butadiynes with α-iminonitriles are described, which provide convenient access to functionalized 3-aminopyrroles.
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Affiliation(s)
- Xu You
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, People's Republic of China
| | - Xin Xie
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, People's Republic of China
| | - Renhong Sun
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, People's Republic of China
| | - Haoyi Chen
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, People's Republic of China
| | - Shi Li
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, People's Republic of China
| | - Yuanhong Liu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, People's Republic of China
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61
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Zhu Y, Hong JJ, Zhou YB, Xiao YW, Lin M, Zhan ZP. Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones. Org Biomol Chem 2014; 12:3797-801. [DOI: 10.1039/c4ob00550c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones with sulfonyl group migrations has been developed.
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Affiliation(s)
- Yu Zhu
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen, People's Republic of China
| | - Jun-Jie Hong
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen, People's Republic of China
| | - Yun-Bin Zhou
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen, People's Republic of China
| | - Yu-Wei Xiao
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen, People's Republic of China
| | - Min Lin
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen, People's Republic of China
| | - Zhuang-Ping Zhan
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen, People's Republic of China
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62
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Luo J, Zhou H, Hu J, Wang R, Tang Q. Efficient catalytic-free method to produce α-aryl cycloalkanones through highly chemoselective coupling of aryl compounds with oxyallyl cations. RSC Adv 2014. [DOI: 10.1039/c4ra01043d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Efficient catalytic-free method to produce α-aryl cycloalkanones through highly chemoselective coupling of aryl compounds with oxyallyl cations at room temperature.
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Affiliation(s)
- Juan Luo
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
- The Faculty of Laboratory Medicine
| | - Hui Zhou
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
| | - Jiwei Hu
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
| | - Rui Wang
- School of Pharmacy & Bioengineering
- Chongqing University of Technology
- Chongqing 400054, P. R. China
| | - Qiang Tang
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
- The Faculty of Laboratory Medicine
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63
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Lu T, Lu Z, Ma ZX, Zhang Y, Hsung RP. Allenamides: a powerful and versatile building block in organic synthesis. Chem Rev 2013; 113:4862-904. [PMID: 23550917 PMCID: PMC4539064 DOI: 10.1021/cr400015d] [Citation(s) in RCA: 272] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ting Lu
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Zhenjie Lu
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Zhi-Xiong Ma
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Yu Zhang
- Discovery Research, Dow AgroSciences LLC, Indianapolis, IN 46268
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
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64
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Kwon Y, McDonald R, West FG. Organoaluminum-Mediated Interrupted Nazarov Reaction. Angew Chem Int Ed Engl 2013; 52:8616-9. [DOI: 10.1002/anie.201303996] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 06/07/2013] [Indexed: 11/10/2022]
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65
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Kwon Y, McDonald R, West FG. Organoaluminum-Mediated Interrupted Nazarov Reaction. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303996] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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66
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Oh CH, Kim JH, Piao L, Yu J, Kim SY. Gold carbenes from substituted propargyl acetates: intramolecular ene-type reactions to 2-acetoxynaphthalene derivatives. Chemistry 2013; 19:10501-5. [PMID: 23794486 DOI: 10.1002/chem.201301384] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Chang Ho Oh
- Department of Chemistry and Research Institute for Natural Science, Hanyang University, Sungdong-Gu, Seoul 133-791, Korea
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67
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Bonderoff SA, Grant TN, West FG, Tremblay M. Nazarov Reactions of Vinyl Cyclopropylamines: An Approach to the Imino-Nazarov Problem. Org Lett 2013; 15:2888-91. [DOI: 10.1021/ol4012663] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sara A. Bonderoff
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
| | - Tina N. Grant
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
| | - F. G. West
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
| | - Martin Tremblay
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
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68
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Brioche J, Meyer C, Cossy J. Synthesis of functionalized allenamides from ynamides by enolate Claisen rearrangement. Org Lett 2013; 15:1626-9. [PMID: 23496162 DOI: 10.1021/ol400402n] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The Claisen rearrangement of N-Boc glycinates derived from ynamido-alcohols affords an efficient and stereoselective access to highly functionalized allenamides. These compounds undergo silver-catalyzed cyclization to 3-pyrrolines which are useful precursors for the synthesis of substituted pyrrolidines.
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Affiliation(s)
- Julien Brioche
- Laboratoire de Chimie Organique, ESPCI Paris Tech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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