1
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Progress in organocatalytic asymmetric (4+3) cycloadditions for the enantioselective construction of seven-membered rings. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1471-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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2
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Zhu Y, Yang L, Zhang X, Xu W, He J, Wang H, Lang M, Peng S. Copper-Catalyzed Cycloadditions of Diazo Compounds with Imidazolidines/Hexahydropyrimidines for the Syntheses of N-Heterocycles. Org Lett 2022; 24:6443-6448. [PMID: 36017905 DOI: 10.1021/acs.orglett.2c02561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reported herein are the unprecedented copper-catalyzed formal [n + 1]/[n + 3] (n = 5, 6) cycloadditions of diazo compounds with imidazolidines/hexahydropyrimidines, thus providing a general, economical, and efficient route to construct different sized (six- to nine-membered) diaza-heterocycles in moderate to excellent yields under mild reaction conditions. This strategy features the use of copper catalyst to accomplish such diverse annulations and the utilization of imidazolidines/hexahydropyrimidines as stable 1,5-/1,6-dipoles.
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Affiliation(s)
- Yuqi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Liangliang Yang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Xue Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Wendi Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Jieyin He
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Haiyang Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Ming Lang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Shiyong Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
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3
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Chiral nickel(II) complex catalyzed asymmetric [3 + 2] cycloaddition of α-diazo pyrazoleamides with 2-siloxy-1-alkenes. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Shi B, Liu JB, Wang ZT, Wang L, Lan Y, Lu LQ, Xiao WJ. Synthesis of Chiral Endocyclic Allenes by Palladium-Catalyzed Asymmetric Annulation Followed by Cope Rearrangement. Angew Chem Int Ed Engl 2022; 61:e202117215. [PMID: 35333435 DOI: 10.1002/anie.202117215] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Indexed: 11/10/2022]
Abstract
Catalytic asymmetric synthesis of chiral endocyclic allenes remains a challenge in allene chemistry owing to unfavored tension and complex chirality. Here, we present a new relay strategy merging Pd-catalyzed asymmetric [3+2] annulation with enyne-Cope rearrangement, providing a facile route to chiral 9-membered endocyclic allenes with high efficiency and enantioselectivity. Moreover, theoretical calculations and experimental studies were performed to illustrate the critical, but unusual Cope rearrangement that allows for the complete central-to-axial chirality transfer.
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Affiliation(s)
- Bin Shi
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Jia-Bin Liu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| | - Ze-Tian Wang
- School of Chemical and Environmental Engineering, Jianghan University, Wuhan, 430056, China
| | - Liang Wang
- School of Chemical and Environmental Engineering, Jianghan University, Wuhan, 430056, China
| | - Yu Lan
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
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5
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Zhang MM, Qu BL, Shi B, Xiao WJ, Lu LQ. High-order dipolar annulations with metal-containing reactive dipoles. Chem Soc Rev 2022; 51:4146-4174. [PMID: 35521739 DOI: 10.1039/d1cs00897h] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Medium-sized heterocycles are widespread among a spectrum of structurally intriguing and biologically significant natural products and synthetic pharmaceuticals. Metal-catalyzed high-order dipolar annulations resembling reactions of metal-containing reactive dipoles with dipolarophiles constitute a highly efficient and flexible strategy for constructing medium-sized heterocycles. Mechanistically, these annulation reactions usually proceeding through stepwise pathways are different from the classic high-order pericyclic reactions that follow the Woodward-Hoffman rules. More significantly, asymmetric high-order dipolar annulations using chiral organometallic catalysts have been proven successful for constructing chiral medium-sized heterocycles with high enantio- and diastereoselectivity. This review highlights the impressive advances in this area and is focused on the reactivity, scope, mechanisms and applications of high-order dipolar annulation reactions.
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Affiliation(s)
- Mao-Mao Zhang
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China.
| | - Bao-Le Qu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China.
| | - Bin Shi
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China.
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China. .,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China. .,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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6
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Design, synthesis, and applications of stereospecific 1,3-diene carbonyls. Sci China Chem 2022. [DOI: 10.1007/s11426-021-1204-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Lu LQ, Shi B, Liu JB, Wang ZT, Wang L, Lan Y, Xiao WJ. Synthesis of Chiral Endocyclic Allenes by Palladium‐Catalyzed Asymmetric Annulation Followed by Cope Rearrangement. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Liang-Qiu Lu
- Central China Normal University CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticides and Chemical Biology 152 Luoyu Road 430079 Wuhan, Hubei CHINA
| | - Bin Shi
- Central China Normal University College of Chemistry CHINA
| | - Jia-Bin Liu
- Zhengzhou University College of Chemistry CHINA
| | - Ze-Tian Wang
- Jianghan University School of Chemical and Environmental Engineering CHINA
| | - Liang Wang
- Jianghan University School of Chemical and Environmental Engineering CHINA
| | - Yu Lan
- Zhengzhou University College of Chemistry CHINA
| | - Wen-Jing Xiao
- Central China Normal University College of Chemistry CHINA
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8
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Lichtenstein YI, Golovanov IS, Ioffe SL, Tabolin AA. Tandem [3+2]-cycloaddition/homo-Baldwin rearrangement of silyl nitronates and donor-acceptor cyclopropenes. A novel approach to polysubstituted aziridines starting from nitro compounds. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Liu Z, Yang Y, Jiang X, Song Q, Zanoni G, Liu S, Bi X. Dearomative [4 + 3] cycloaddition of furans with vinyl- N-triftosylhydrazones by silver catalysis: stereoselective access to oxa-bridged seven-membered bicycles. Org Chem Front 2022. [DOI: 10.1039/d2qo00256f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A practical dearomative [4 + 3] cycloaddition of furans with vinylcarbenes to access oxa-bridged seven-membered carbocycles, with complete and predictable stereoselectivity, is achieved by merging silver catalysis and vinyl-N-triftosylhydrazones.
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Affiliation(s)
- Zhaohong Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yong Yang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xinyu Jiang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qingmin Song
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Giuseppe Zanoni
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Shaopeng Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xihe Bi
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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10
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Fang Z, Ma Y, Liu S, Bai H, Li S, Ning Y, Zanoni G, Liu Z. Silver-catalyzed [4 + 3] cycloaddition of 1,3-dienes with alkenyl- N-triftosylhydrazones: a practical approach to 1,4-cycloheptadienes. Org Chem Front 2022. [DOI: 10.1039/d2qo00806h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A formal [4 + 3] cycloaddition of 1,3-dienes with alkenyl-N-triftosylhydrazones was developed using silver catalysis, producing a broad spectrum of complex 1,4-cycloheptadienes with high yields and predictable stereochemistry.
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Affiliation(s)
- Zhongxue Fang
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224007, People's Republic of China
| | - Yiming Ma
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City 224007, People's Republic of China
| | - Shaopeng Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Huricha Bai
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Shuang Li
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yongquan Ning
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Giuseppe Zanoni
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Zhaohong Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
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11
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Yang W, Pu M, Lin X, Chen M, Song Y, Liu X, Wu YD, Feng X. Enantioselective Formal Vinylogous N-H Insertion of Secondary Aliphatic Amines Catalyzed by a High-Spin Cobalt(II) Complex. J Am Chem Soc 2021; 143:9648-9656. [PMID: 34152775 DOI: 10.1021/jacs.1c04367] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Vinylcarbene insertion into the nitrogen-hydrogen (N-H) bond of amines allows direct access to α,β-unsaturated γ-amino acid derivatives, meeting a marked challenge in the control of regio- and enantioselectivities. Here, we report a highly γ-selective and enantioselective insertion into N-H bonds of aliphatic or aromatic secondary amines with vinyl substituted α-diazo pyrazoleamides using a high-spin chiral N,N'-dioxide/cobalt(II) complex catalyst. The method affords a wide variety of valuable optically active Z- and E-type vinyl γ-amino amides. Calculation reveals a spin state change from the quartet cobalt(II) complex to a doublet Co(II)-carbene species for facile Z-selective and enantioselective nucleophilic addition.
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Affiliation(s)
- Wei Yang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Maoping Pu
- Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Xiaobin Lin
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Min Chen
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yanji Song
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory, Shenzhen 518055, China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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12
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Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A‐Type Alkaloids: Divergent Total Syntheses of (−)‐Daphenylline and (−)‐Himalensine A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Fayang G. Qiu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
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13
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Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A-Type Alkaloids: Divergent Total Syntheses of (-)-Daphenylline and (-)-Himalensine A. Angew Chem Int Ed Engl 2021; 60:9439-9443. [PMID: 33569888 DOI: 10.1002/anie.202016212] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/31/2021] [Indexed: 12/16/2022]
Abstract
An efficient general strategy for the synthesis of the Daphniphyllum alkaloids via the rapid construction of a common core intermediate has been established, based on which a divergent total synthesis of (-)-daphenylline and (-)-himalensine A has been accomplished in 16 and 19 steps, respectively. The present work features an enantioselective Mg(ClO4 )2 -catalyzed intramolecular amidocyclization to construct the aza-bridged core structure; a Cu-catalyzed intramolecular cyclopropanation and subsequent phosphine-catalyzed Cope-type rearrangement to furnish the himalensine A scaffold; and a one-pot Diels-Alder/aromatization method to assemble the aromatic skeleton of daphenylline.
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Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fayang G Qiu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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14
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Trost BM, Zuo Z, Schultz JE. Transition-Metal-Catalyzed Cycloaddition Reactions to Access Seven-Membered Rings. Chemistry 2020; 26:15354-15377. [PMID: 32705722 DOI: 10.1002/chem.202002713] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/12/2020] [Indexed: 02/06/2023]
Abstract
The efficient and selective synthesis of functionalized seven-membered rings remains an important pursuit within synthetic organic chemistry, as this motif appears in numerous drug-like molecules and natural products. Use of cycloaddition reactions remains an attractive approach for their construction within the perspective of atom and step economy. Additionally, the ability to combine multiple components in a single reaction has the potential to allow for efficient combinatorial strategies of diversity-oriented synthesis. The inherent entropic penalty associated with achieving these transformations has impressively been overcome with development of catalysis, whereby the reaction components can be pre-organized through activation by transition-metal-catalysis. The fine-tuning of metal/ligand combinations as well as reaction conditions allows for achieving chemo-, regio-, diastereo- and enantioselectivity in these transformations. Herein, we discuss recent advances in transition-metal-catalyzed construction of seven-membered rings via combination of 2-4 components mediated by a variety of metals. An emphasis is placed on the mechanistic aspects of these transformations to both illustrate the state of the science and to highlight the unique application of novel processes of transition-metals in these transformations.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA
| | - Zhijun Zuo
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA
| | - Johnathan E Schultz
- Chemical Process Development, Bristol Myers Squibb, New Brunswick, NJ, 08901, USA
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15
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Ren Z, Musaev DG, Davies HML. Influence of Aryl Substituents on the Alignment of Ligands in the Dirhodium Tetrakis(1,2,2‐Triarylcyclopropane‐ carboxylate) Catalysts. ChemCatChem 2020. [DOI: 10.1002/cctc.202001206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhi Ren
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Djamaladdin G. Musaev
- Cherry L. Emerson Center for Scientific Computation Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Huw M. L. Davies
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
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16
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Synergy of activating substrate and introducing C-H···O interaction to achieve Rh2(II)-catalyzed asymmetric cycloisomerization of 1,n-enynes. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9794-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Selvaraj K, Chauhan S, Sandeep K, Swamy KCK. Advances in [4+3]‐Annulation/Cycloaddition Reactions Leading to Homo‐ and Heterocycles with Seven‐Membered Rings. Chem Asian J 2020; 15:2380-2402. [DOI: 10.1002/asia.202000545] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/06/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Karuppu Selvaraj
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
| | - Sachin Chauhan
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
| | - K. Sandeep
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
| | - K. C. Kumara Swamy
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
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18
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Abstract
A (4+3)-cycloaddition combines a four-atom synthon and three-atom synthon to form seven-membered rings. In the past decade, many improvements have been made to this class of cycloaddition, including excellent diastereo- and enantioselectivities, both intra- and intermolecularly. Through the strategic use of transition-metal catalysts, acids, bases, and organocatalysts, it is possible to perform the cycloaddition on a variety of substrates, generating novel seven-membered rings. With these advances, (4+3)-cycloaddition has also been applied to the synthesis of biologically relevant compounds and natural products. We exclude the cycloadditions of cyclic dienes such as furan, pyrrole, cyclohexadiene or cyclopentadiene as Chiu, Harmata, Mascareñas and others have recently published thorough reviews on that topic. We will however discuss the recent additions (2009–2020) to the literature for the (4+3)-cycloadditions involving other types of four-atom synthons.1 Introduction2 Rhodium2.1 Cyclopropanation/Cope Rearrangement2.2 C–H activation3 Gold, Silver4 Copper5 Palladium, Platinum, Iridium6 Dual-Activation7 Conclusion
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Affiliation(s)
- Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
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19
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Zhang B, Davies HML. Rhodium-Catalyzed Enantioselective [4+2] Cycloadditions of Vinylcarbenes with Dienes. Angew Chem Int Ed Engl 2020; 59:4937-4941. [PMID: 31910310 DOI: 10.1002/anie.201914354] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/06/2019] [Indexed: 12/13/2022]
Abstract
The reaction of 2-siloxycyclo-1,3-dienes with E-vinyldiazoacetates in the presence of the bulky chiral dirhodium tetracarboxylate catalyst, Rh2 (R-p-PhTPCP)4 results in an enantioselective [4+2] cycloaddition, in which three new stereogenic centers are formed. The [4+2] cycloadducts are generated as single diastereomers with high enantiocontrol (95-98 % ee). When the diene contains an additional stereogenic center, effective kinetic resolution can be achieved.
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Affiliation(s)
- Bowen Zhang
- Emory University, Chemistry, 1515 Dickey Drive, Atlanta, GA, 30024, USA
| | - Huw M L Davies
- Emory University, Chemistry, 1515 Dickey Drive, Atlanta, GA, 30024, USA
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20
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Zhang B, Davies HML. Rhodium‐Catalyzed Enantioselective [4+2] Cycloadditions of Vinylcarbenes with Dienes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bowen Zhang
- Emory UniversityChemistry 1515 Dickey Drive Atlanta GA 30024 USA
| | - Huw M. L. Davies
- Emory UniversityChemistry 1515 Dickey Drive Atlanta GA 30024 USA
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21
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Zhu X, Wang Z, Hou B, Zhang H, Deng C, Ye L. Zinc‐Catalyzed Asymmetric Formal [4+3] Annulation of Isoxazoles with Enynol Ethers by 6π Electrocyclization: Stereoselective Access to 2
H
‐Azepines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912534] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xin‐Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Ze‐Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Bo‐Shang Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Hao‐Wen Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 China
| | - Long‐Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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22
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Zhu XQ, Wang ZS, Hou BS, Zhang HW, Deng C, Ye LW. Zinc-Catalyzed Asymmetric Formal [4+3] Annulation of Isoxazoles with Enynol Ethers by 6π Electrocyclization: Stereoselective Access to 2H-Azepines. Angew Chem Int Ed Engl 2019; 59:1666-1673. [PMID: 31724314 DOI: 10.1002/anie.201912534] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/31/2019] [Indexed: 12/17/2022]
Abstract
6π electrocyclization has attracted interest in organic synthesis because of its high stereospecificity and atom economy in the construction of versatile 5-7-membered cycles. However, examples of asymmetric 6π electrocyclization are quite scarce, and have to rely on the use of chiral organocatalysts, and been limited to pentadienyl-anion- and triene-type 6π electrocyclizations. Described herein is a zinc-catalyzed formal [4+3] annulation of isoxazoles with 3-en-1-ynol ethers via 6π electrocyclization, leading to the site-selective synthesis of functionalized 2H-azepines and 4H-azepines in good to excellent yields with broad substrate scope. Moreover, this strategy has also been used to produce chiral 2H-azepines with high enantioselectivities (up to 97:3 e.r.). This protocol not only is the first asymmetric heptatrienyl-cation-type 6π electrocyclization, but also is the first asymmetric reaction of isoxazoles with alkynes and the first asymmetric catalysis based on ynol ethers.
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Affiliation(s)
- Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Ze-Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Bo-Shang Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hao-Wen Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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23
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Davies HML. Finding Opportunities from Surprises and Failures. Development of Rhodium-Stabilized Donor/Acceptor Carbenes and Their Application to Catalyst-Controlled C-H Functionalization. J Org Chem 2019; 84:12722-12745. [PMID: 31525891 PMCID: PMC7232105 DOI: 10.1021/acs.joc.9b02428] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Catalyst-controlled C-H functionalization by means of the C-H insertion chemistry of rhodium carbenes has become a powerful synthetic method. The key requirements for the development of this chemistry are donor/acceptor carbenes and the chiral dirhodium tetracarboxylate catalysts. This perspective will describe the stages involved in developing this chemistry and illustrate the scope of the donor/acceptor carbene C-H functionalization.
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Affiliation(s)
- Huw M L Davies
- Department of Chemistry , Emory University , 1515 Dickey Drive , Atlanta , Georgia 30322 , Unites States
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24
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Gold(I)-catalyzed [4 + 1]/[4 + 3] annulations of diazo esters with hexahydro-1,3,5-triazines: Theoretical study of mechanism and regioselectivity. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.06.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Da Ho L, Otog N, Fujisawa I, Iwasa S. Catalytic Asymmetric Carbene Transfer Reactions of Diazo Oxime Ethers with Olefins and Their Synthetic Applications. Org Lett 2019; 21:7470-7474. [PMID: 31482700 DOI: 10.1021/acs.orglett.9b02771] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first catalytic asymmetric cyclopropanation of diazo oxime ethers with olefins was developed. In the presence of a Ru(II)-Pheox catalyst, various optically active cyclopropyl oxime derivatives were obtained in high yields (up to 99%) with high enantioselectivities (up to 98% ee). Furthermore, optically active cyclopropyl oxime ethers could be successfully converted into the corresponding cyclopropyl methylamine derivatives via metal hydride and Grignard reagent mediated Beckmann rearrangement, which are potential candidates for the assessment of biological and pharmaceutical activities.
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Affiliation(s)
- Linh Da Ho
- Department of Applied Chemistry and Life Science , Toyohashi University of Technology , 1-1 Hibarigaoka , Tempaku-cho , Toyohashi 441-8580 , Japan
| | - Nansalmaa Otog
- Department of Applied Chemistry and Life Science , Toyohashi University of Technology , 1-1 Hibarigaoka , Tempaku-cho , Toyohashi 441-8580 , Japan
| | - Ikuhide Fujisawa
- Department of Applied Chemistry and Life Science , Toyohashi University of Technology , 1-1 Hibarigaoka , Tempaku-cho , Toyohashi 441-8580 , Japan
| | - Seiji Iwasa
- Department of Applied Chemistry and Life Science , Toyohashi University of Technology , 1-1 Hibarigaoka , Tempaku-cho , Toyohashi 441-8580 , Japan
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26
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Shao X, Malcolmson SJ. Catalytic Enantio- and Diastereoselective Cyclopropanation of 2-Azadienes for the Synthesis of Aminocyclopropanes Bearing Quaternary Carbon Stereogenic Centers. Org Lett 2019; 21:7380-7385. [PMID: 31465235 PMCID: PMC6790987 DOI: 10.1021/acs.orglett.9b02692] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report the catalytic enantio- and diastereoselective preparation of aminocyclopropanes by the cyclopropanation of terminal and (Z)-internal 2-azadienes with donor/acceptor carbenes derived from α-diazoesters. The resulting cyclopropanes bear quaternary carbon stereogenic centers vicinal to the amino-substituted carbon and are formed as a single diastereomer in up to 99:1 er and 97% yield with 0.5 mol % of Rh2(DOSP)4 and only 1.5 equiv of the diazo reagent. Transformations with internal azadienes afford cyclopropanes with three contiguous stereogenic centers.
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Affiliation(s)
- Xinxin Shao
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United State
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United State
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27
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Marichev KO, Doyle MP. Catalytic asymmetric cycloaddition reactions of enoldiazo compounds. Org Biomol Chem 2019; 17:4183-4195. [PMID: 30924829 PMCID: PMC6484446 DOI: 10.1039/c9ob00478e] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This review describes catalytic asymmetric cycloaddition reactions of silyl-protected enoldiazo compounds for the construction of highly functionalized carbo- and heterocycles which possess one or more chiral center(s). The enoldiazo compound or its derivative, donor-acceptor cyclopropene, form electrophilic vinylogous metal carbene intermediates that combine stepwise with nucleophilic dipolar reactants to form products from [3 + 1]-, [3 + 2]-, [3 + 3]-, [3 + 4]-, and [3 + 5]-cycloaddition, generally in high yield and with exceptional stereocontrol and regioselectivity.
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Affiliation(s)
- Kostiantyn O. Marichev
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, USA.
| | - Michael P. Doyle
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, USA.
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28
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López LA, González J. Copper(i)-carbenes as key intermediates in the [3 + 2]-cyclization of pyridine derivatives with alkenyldiazoacetates: a computational study. Org Biomol Chem 2019; 17:646-654. [PMID: 30575834 DOI: 10.1039/c8ob02676a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This work reports a computational study of the copper(i)-catalyzed regioselective synthesis of indolizine derivatives through the [3 + 2]-cyclization reaction of vinyldiazo acetates and pyridine derivatives. This reaction is predicted to proceed via a multi-step process with the initial decomposition of the diazo function and generation of an electrophilic copper(i) carbene intermediate. Subsequent attack of the pyridine derivative at the vinylogous position of the carbene would generate a vinylcuprate intermediate that would evolve to the final products through a sequence involving cyclization, reductive elimination, metal decoordination and final oxidative aromatization. According to our calculations, an alternative pathway involving the initial activation of the pyridine seems unlikely. These theoretical results could pave the way for further developments in vinyldiazo chemistry.
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Affiliation(s)
- Luis A López
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, Julián Clavería, 8, 33006 Oviedo, Spain.
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29
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Xu G, Chen L, Sun J. Rhodium-Catalyzed Asymmetric Dearomative [4 + 3]-Cycloaddition of Vinylindoles with Vinyldiazoacetates: Access to Cyclohepta[b]indoles. Org Lett 2018; 20:3408-3412. [DOI: 10.1021/acs.orglett.8b01353] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Long Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
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30
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Pei G, Liu Y, Chen G, Yuan X, Jiang YY, Bi S. Unveiling the mechanisms and secrets of chemoselectivities in Au(i)-catalyzed diazo-based couplings with aryl unsaturated aliphatic alcohols. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01352g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The mechanisms and origins of the unsaturated-aliphatic-alcohols-modulated chemoselectivity of Au-catalyzed carbene transfers from diazo compounds are disclosed by DFT studies.
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Affiliation(s)
- Guojing Pei
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Yuxia Liu
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Guang Chen
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
- Institute of Functional Materials and Molecular Imaging
| | - Xiangai Yuan
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Yuan-Ye Jiang
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Siwei Bi
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
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31
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Zheng YS, Tu L, Gao LM, Huang R, Feng T, Sun H, Wang WX, Li ZH, Liu JK. Accessing benzooxadiazepinesviaformal [4 + 3] cycloadditions of aza-o-quinone methides with nitrones. Org Biomol Chem 2018; 16:2639-2642. [DOI: 10.1039/c8ob00201k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Seven membered N-heterocycles were constructed through a formal [4 + 3] cycloaddition of nitrones within situgenerated aza-o-quinone methides.
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Affiliation(s)
- Yong-Sheng Zheng
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
| | - Liang Tu
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
| | - Li-Mei Gao
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
- Analytical & Measuring Center
| | - Rong Huang
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
| | - Tao Feng
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
| | - Huan Sun
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
| | - Wen-Xuan Wang
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
| | - Zheng-Hui Li
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
- Analytical & Measuring Center
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences
- South-Central University of Nationalities
- Wuhan
- China
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32
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Schmid SC, Guzei IA, Schomaker JM. A Stereoselective [3+1] Ring Expansion for the Synthesis of Highly Substituted Methylene Azetidines. Angew Chem Int Ed Engl 2017; 56:12229-12233. [PMID: 28834110 PMCID: PMC5693379 DOI: 10.1002/anie.201705202] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 01/08/2023]
Abstract
The reaction of rhodium-bound carbenes with strained bicyclic methylene aziridines results in a formal [3+1] ring expansion to yield highly substituted methylene azetidines with excellent regio- and stereoselectivity. The reaction appears to proceed through an ylide-type mechanism, where the unique strain and structure of the methylene aziridine promotes a ring-opening/ring-closing cascade that efficiently transfers chirality from substrate to product. The resultant products can be elaborated into new azetidine scaffolds containing vicinal tertiary-quaternary and even quaternary-quaternary stereocenters.
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Affiliation(s)
- Steven C Schmid
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
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33
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Schmid SC, Guzei IA, Schomaker JM. A Stereoselective [3+1] Ring Expansion for the Synthesis of Highly Substituted Methylene Azetidines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705202] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Steven C. Schmid
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Ilia A. Guzei
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Jennifer M. Schomaker
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
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34
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Cheng QQ, Deng Y, Lankelma M, Doyle MP. Cycloaddition reactions of enoldiazo compounds. Chem Soc Rev 2017; 46:5425-5443. [PMID: 28726896 PMCID: PMC5575991 DOI: 10.1039/c7cs00324b] [Citation(s) in RCA: 192] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enoldiazo esters and amides have proven to be versatile reagents for cycloaddition reactions that allow highly efficient construction of various carbocycles and heterocycles. Their versatility is exemplified by (1) [2+n]-cycloadditions (n = 3, 4) by the enol silyl ether units of enoldiazo compounds with retention of the diazo functionality to furnish α-cyclic-α-diazo compounds that are themselves subject to further transformations of the diazo functional group; (2) [3+n]-cycloadditions (n = 1-5) by metallo-enolcarbenes formed by catalytic dinitrogen extrusion from enoldiazo compounds; (3) [2+n]-cycloadditions (n = 3, 4) by donor-acceptor cyclopropenes generated in situ from enoldiazo compounds that produce cyclopropane-fused ring systems. The role of dirhodium(ii) and the emergence of copper(i) catalysts are described, as are the different outcomes of reactions initiated with these catalysts. This comprehensive review on cycloaddition reactions of enoldiazo compounds, with emphasis on methodology development, mechanistic insight, and catalyst-controlled chemodivergence, aims to provide inspiration for future discoveries in the field and to catalyze the application of enoldiazo reagents by the wider synthetic community.
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Affiliation(s)
- Qing-Qing Cheng
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, USA.
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35
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Zheng Y, Chi Y, Bao M, Qiu L, Xu X. Gold-Catalyzed Tandem Dual Heterocyclization of Enynones with 1,3,5-Triazines: Bicyclic Furan Synthesis and Mechanistic Insights. J Org Chem 2017; 82:2129-2135. [DOI: 10.1021/acs.joc.6b02947] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Zheng
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yongjian Chi
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ming Bao
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Lihua Qiu
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinfang Xu
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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36
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Craig, II RA, Roizen JL, Smith RC, Jones AC, Virgil SC, Stoltz BM. Enantioselective, Convergent Synthesis of the Ineleganolide Core by a Tandem Annulation Cascade. Chem Sci 2017; 8:507-514. [PMID: 28239443 PMCID: PMC5321630 DOI: 10.1039/c6sc03347d] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 08/15/2016] [Indexed: 12/13/2022] Open
Abstract
An enantioselective and diastereoselective approach toward the synthesis of the polycyclic norditerpenoid ineleganolide is disclosed. A palladium-catalyzed enantioselective allylic alkylation is employed to stereoselectively construct the requisite chiral tertiary ether and facilitate the synthesis of a 1,3-cis-cyclopentenediol building block. Careful substrate design enabled the convergent assembly of the ineleganolide [6,7,5,5]-tetracyclic scaffold by a diastereoselective cyclopropanation-Cope rearrangement cascade under unusually mild conditions. Computational evaluation of ground state energies of late-stage synthetic intermediates was used to guide synthetic development and aid in the investigation of the conformational rigidity of these highly constrained and compact polycyclic structures. This work represents the first successful synthesis of the core structure of any member of the polycyclic norcembranoid diterpene family of natural products. Advanced synthetic manipulations generated a series of natural product-like compounds that were shown to possess selective secretory antagonism of either interleukin-5 or interleukin-17. This bioactivity stands in contrast to the known antileukemic activity of ineleganolide and suggests the norcembranoid natural product core may serve as a useful scaffold for the development of diverse therapeutics.
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Affiliation(s)
- Robert A. Craig, II
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Jennifer L. Roizen
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Russell C. Smith
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Amanda C. Jones
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Scott C. Virgil
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Brian M. Stoltz
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
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37
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Shved AS, Tabolin AA, Novikov RA, Nelyubina YV, Timofeev VP, Ioffe SL. Six-Membered Cyclic Nitroso Acetals: Synthesis and Studies of the Nitrogen Inversion Process ofN-Silyloxy-3,6-dihydro-2H-1,2-oxazines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600952] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Alexander S. Shved
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences; Leninsky prosp. 47 119991 Moscow Russian Federation
- Higher Chemical College; D. I. Mendeleev University of Chemical Technology of Russia; Miusskaya sq. 9 125047 Moscow Russian Federation
| | - Andrey A. Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences; Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Roman A. Novikov
- V. A. Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vavilov str. 32 119991 Moscow Russian Federation
| | - Yulia V. Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str. 28 119991 Moscow Russian Federation
| | - Vladimir P. Timofeev
- V. A. Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vavilov str. 32 119991 Moscow Russian Federation
| | - Sema L. Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences; Leninsky prosp. 47 119991 Moscow Russian Federation
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38
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López E, González-Pelayo S, López LA. Recent Developments in Coinage Metal Catalyzed Transformations of Stabilized Vinyldiazo Compounds: Beyond Carbenic Pathways. CHEM REC 2016; 17:312-325. [PMID: 27701805 DOI: 10.1002/tcr.201600099] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Indexed: 12/12/2022]
Abstract
Transition metal-catalyzed transformations of vinyldiazo compounds have become a versatile tool in organic synthesis. Although several transition metals have been investigated for this purpose, this field has been mainly dominated by dirhodium catalysts. Remarkable levels of chemo-, regio-, diastereo- and enantioselectivity have been reached in some of these rhodium-catalyzed transformations. In the last few years coinage metals have also emerged as useful catalysts in transformations involving vinyldiazo compounds. In some cases, highly efficient catalyst-dependent protocols arising from divergent mechanistic pathways have been reported. In this Personal Account, we aim to showcase recent advances in metal coinage catalyzed transformations of vinyldiazoacetates, an exciting field of research to which our group has actively contributed in the last few years.
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Affiliation(s)
- Enol López
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-, Oviedo, Spain
| | - Silvia González-Pelayo
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-, Oviedo, Spain
| | - Luis A López
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-, Oviedo, Spain
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39
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Zhu C, Xu G, Sun J. Gold-Catalyzed Formal [4+1]/[4+3] Cycloadditions of Diazo Esters with Triazines. Angew Chem Int Ed Engl 2016; 55:11867-71. [PMID: 27539065 DOI: 10.1002/anie.201606139] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Indexed: 11/10/2022]
Abstract
Reported herein is the unprecedented gold-catalyzed formal [4+1]/[4+3] cycloadditions of diazo esters with hexahydro-1,3,4-triazines, thus providing five- and seven-membered heterocycles in moderate to high yields under mild reaction conditions. These reactions feature the use of a gold complex to accomplish the diverse annulations and the first example of the involvement of a gold metallo-enolcarbene in a cycloaddition. It is also the first utilization of stable triazines as formal dipolar adducts in the carbene-involved cycloadditions. Mechanistic investigations reveal that the triazines reacted directly, rather than as formaldimine precursors, in the reaction process.
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Affiliation(s)
- Chenghao Zhu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, 1 Gehu Road, 213164, Changzhou, China
| | - Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, 1 Gehu Road, 213164, Changzhou, China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, 1 Gehu Road, 213164, Changzhou, China. ,
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40
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Zhu C, Xu G, Sun J. Gold-Catalyzed Formal [4+1]/[4+3] Cycloadditions of Diazo Esters with Triazines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606139] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Chenghao Zhu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology; School of Pharmaceutical Engineering & Life Science; Changzhou University; 1 Gehu Road 213164 Changzhou China
| | - Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology; School of Pharmaceutical Engineering & Life Science; Changzhou University; 1 Gehu Road 213164 Changzhou China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology; School of Pharmaceutical Engineering & Life Science; Changzhou University; 1 Gehu Road 213164 Changzhou China
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41
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Deng Y, Yglesias MV, Arman H, Doyle MP. Catalytic Asymmetric Synthesis of Cyclopentyl β‐Amino Esters by [3+2] Cycloaddition of Enecarbamates with Electrophilic Metalloenolcarbene Intermediates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605438] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yongming Deng
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
| | - Matthew V. Yglesias
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
| | - Hadi Arman
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
| | - Michael P. Doyle
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
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42
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Deng Y, Yglesias MV, Arman H, Doyle MP. Catalytic Asymmetric Synthesis of Cyclopentyl β‐Amino Esters by [3+2] Cycloaddition of Enecarbamates with Electrophilic Metalloenolcarbene Intermediates. Angew Chem Int Ed Engl 2016; 55:10108-12. [DOI: 10.1002/anie.201605438] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Yongming Deng
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
| | - Matthew V. Yglesias
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
| | - Hadi Arman
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
| | - Michael P. Doyle
- Department of Chemistry The University of Texas at San Antonio, One UTSA Circle San Antonio TX 78249 USA
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43
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Wang Q, Li TR, Lu LQ, Li MM, Zhang K, Xiao WJ. Catalytic Asymmetric [4 + 1] Annulation of Sulfur Ylides with Copper–Allenylidene Intermediates. J Am Chem Soc 2016; 138:8360-3. [DOI: 10.1021/jacs.6b04414] [Citation(s) in RCA: 180] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qiang Wang
- College of Chemistry, Central China Normal University, 152 Luoyu
Road, Wuhan, Hubei 430079, China
| | - Tian-Ren Li
- College of Chemistry, Central China Normal University, 152 Luoyu
Road, Wuhan, Hubei 430079, China
| | - Liang-Qiu Lu
- College of Chemistry, Central China Normal University, 152 Luoyu
Road, Wuhan, Hubei 430079, China
| | - Miao-Miao Li
- College of Chemistry, Central China Normal University, 152 Luoyu
Road, Wuhan, Hubei 430079, China
| | - Kai Zhang
- College of Chemistry, Central China Normal University, 152 Luoyu
Road, Wuhan, Hubei 430079, China
| | - Wen-Jing Xiao
- College of Chemistry, Central China Normal University, 152 Luoyu
Road, Wuhan, Hubei 430079, China
- State Key
Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
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44
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Gulías M, Mascareñas JL. Metallkatalysierte Anellierungen durch Aktivierung und Spaltung von C-H-Bindungen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511567] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) und Departamento de Química Orgánica, 15782; Universidade de Santiago de Compostela; Spanien
| | - José Luis Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) und Departamento de Química Orgánica, 15782; Universidade de Santiago de Compostela; Spanien
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45
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Gulías M, Mascareñas JL. Metal-Catalyzed Annulations through Activation and Cleavage of C−H Bonds. Angew Chem Int Ed Engl 2016; 55:11000-19. [DOI: 10.1002/anie.201511567] [Citation(s) in RCA: 406] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 02/17/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, 15782; Universidade de Santiago de Compostela; Spain
| | - José Luis Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, 15782; Universidade de Santiago de Compostela; Spain
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46
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Nguyen TQ, Alqurafi M, Edwards C, Nguyen P, Kim J, Casco S, Bennet M, Chiang C, Lohry M, Cox M, Meshram B, Le D, Kim E, Smriti S, Oelschlaeger P, Buynak JD. Functionalizing the γ-Position of α-Diazo-β-ketoesters. Tetrahedron Lett 2016; 57:3330-3333. [PMID: 27956752 DOI: 10.1016/j.tetlet.2016.06.065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Although α-diazo-β-ketoesters are synthetically versatile intermediates, methodology for introducing this functionality into complex molecules is still limited, most frequently involving a carboxylic acid precursor, which is then activated and transformed into a β-ketoester, with the diazo group being subsequently added with a diazo transfer reagent. While introducing this highly functional moiety in a convergent one step process would be ideal, such an objective is limited by the relatively few studies which address functionalization of the α-diazo-β-ketoester at the γ-position. In the present investigation, we evaluate strategies, both new and established, for functionalizing α-diazo-β-ketoesters, particularly with regard to generating compounds prospectively useful in the synthesis of C1-substituted carbapenems. We report the first δ-aldehydo-α-diazo-β-ketoester as well as a method for its oxidation to the corresponding methyl ester, and the formation of a new substituted pyrazole under basic conditions.
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Affiliation(s)
- Thu Q Nguyen
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Maha Alqurafi
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Cash Edwards
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Pauline Nguyen
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Jean Kim
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Samuel Casco
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Maricka Bennet
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Christopher Chiang
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Maureen Lohry
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Melina Cox
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Byron Meshram
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Duyen Le
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Eugene Kim
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Snigdha Smriti
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
| | - Peter Oelschlaeger
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 East Second St., Pomona, California, 91768, USA
| | - John D Buynak
- Department of Chemistry, Southern Methodist University, Dallas, TX, 75275-0314 USA
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47
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2014. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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Zhao HW, Pang HL, Tian T, Li B, Chen XQ, Song XQ, Meng W, Yang Z, Liu YY, Zhao YD. Construction of 2,3,4,7-Tetrahydro-1,2,4,5-oxatriazepines via [4+3] Cycloadditions of α-Halogeno Hydrazones with Nitrones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600093] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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49
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Cheng Q, Yedoyan J, Arman H, Doyle MP. Dirhodium(II)‐Catalyzed Annulation of Enoldiazoacetamides with α‐Diazoketones: An Efficient and Highly Selective Approach to Fused and Bridged Ring Systems. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601260] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Qing‐Qing Cheng
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Julietta Yedoyan
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Hadi Arman
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Michael P. Doyle
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
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50
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Cheng QQ, Yedoyan J, Arman H, Doyle MP. Dirhodium(II)-Catalyzed Annulation of Enoldiazoacetamides with α-Diazoketones: An Efficient and Highly Selective Approach to Fused and Bridged Ring Systems. Angew Chem Int Ed Engl 2016; 55:5573-6. [PMID: 27006138 DOI: 10.1002/anie.201601260] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 12/11/2022]
Abstract
A dirhodium(II)-catalyzed annulation reaction between two structurally different diazocarbonyl compounds furnishes the donor-acceptor cyclopropane-fused benzoxa[3.2.1]octane scaffold with excellent chemo-, regio-, and diastereoselectivity under exceptionally mild conditions. The composite transformation occurs by [3+2]-cycloaddition between donor-acceptor cyclopropenes generated from enoldiazoacetamides and carbonyl ylides formed from intramolecular carbene-carbonyl cyclization in one pot with one catalyst. The annulation products can be readily transformed into benzoxa[3.3.1]nonane and hexahydronaphthofuran derivatives with exact stereocontrol. This method allows the efficient construction of three fused and bridged ring systems, all of which are important skeletons of numerous biologically active natural products.
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Affiliation(s)
- Qing-Qing Cheng
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Julietta Yedoyan
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Hadi Arman
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA.
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