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Li L, Shan C, Shi J, Li W, Lan Y, Li Y. The Stannum-Ene Reactions of Benzyne and Cyclohexyne with Superb Chemoselectivity for Cyclohexyne. Angew Chem Int Ed Engl 2022; 61:e202117351. [PMID: 35170157 DOI: 10.1002/anie.202117351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Indexed: 12/25/2022]
Abstract
The stannum-ene reactions of both benzyne and cyclohexyne were realized, which is particularly suitable for cyclohexyne with a broad substrate scope and excellent chemoselectivity. Our DFT calculations via distortion/interaction analysis revealed that both stannum- and hydrogen-ene reactions with cyclohexyne have later transition states due to their higher distortion energies in the transition states than those in benzyne reactions, which lead to enhanced Pauli repulsion as the decisive factor in the interaction energy accompanied with enlarged energy gap between two types of ene reactions. Therefore, excellent chemoselectivity was disclosed in the cyclohexyne-ene reaction.
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Affiliation(s)
- Lianggui Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng St., Chongqing, 400030, P. R. China
| | - Chunhui Shan
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng St., Chongqing, 400030, P. R. China.,College of Chemistry, Chongqing Normal University, Chongqing, 401331, P. R. China
| | - Jiarong Shi
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng St., Chongqing, 400030, P. R. China
| | - Wensheng Li
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, P. R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng St., Chongqing, 400030, P. R. China.,Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Yang Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng St., Chongqing, 400030, P. R. China.,College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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Li L, Shan C, Shi J, Li W, Lan Y, Li Y. The Stannum–Ene Reactions of Benzyne and Cyclohexyne with Superb Chemoselectivity for Cyclohexyne. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lianggui Li
- School of Chemistry and Chemical Engineering Chongqing University 174 Shazheng St. Chongqing 400030 P. R. China
| | - Chunhui Shan
- School of Chemistry and Chemical Engineering Chongqing University 174 Shazheng St. Chongqing 400030 P. R. China
- College of Chemistry Chongqing Normal University Chongqing 401331 P. R. China
| | - Jiarong Shi
- School of Chemistry and Chemical Engineering Chongqing University 174 Shazheng St. Chongqing 400030 P. R. China
| | - Wensheng Li
- College of Chemistry and Chemical Engineering Chongqing University of Technology Chongqing 400054 P. R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering Chongqing University 174 Shazheng St. Chongqing 400030 P. R. China
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan 450001 P. R. China
| | - Yang Li
- School of Chemistry and Chemical Engineering Chongqing University 174 Shazheng St. Chongqing 400030 P. R. China
- College of Chemistry Jilin University Changchun 130012 P. R. China
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Cho S, McLaren EJ, Wang Q. Three‐Component Difunctionalization of Cyclohexenyl Triflates: Direct Access to Versatile Cyclohexenes via Cyclohexynes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109482] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Seoyoung Cho
- Department of Chemistry Duke University Durham NC 27708 USA
| | - E. J. McLaren
- Department of Chemistry Duke University Durham NC 27708 USA
| | - Qiu Wang
- Department of Chemistry Duke University Durham NC 27708 USA
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Cho S, McLaren EJ, Wang Q. Three-Component Difunctionalization of Cyclohexenyl Triflates: Direct Access to Versatile Cyclohexenes via Cyclohexynes. Angew Chem Int Ed Engl 2021; 60:26332-26336. [PMID: 34644004 DOI: 10.1002/anie.202109482] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/27/2021] [Indexed: 11/06/2022]
Abstract
Difunctionalization of strained cyclic alkynes presents a powerful strategy to build richly functionalized cyclic alkenes in an expedient fashion. Herein we disclose an efficient and flexible approach to achieve carbohalogenation, dicarbofunctionalization, aminohalogenation and aminocarbonation of readily available cyclohexenyl triflates. We have demonstrated the novel use of zincate base/nucleophile system for effective formation of key cyclohexyne intermediates and selective addition of various carbon and nitrogen nucleophiles. Importantly, leveraging the resulting organozincates enables the incorporation of a broad range of electrophilic partners to deliver structurally diverse cyclohexene motifs. The importance and utility of this method is also exemplified by the modularity of this approach and the ease in which even highly complex polycyclic scaffolds can be accessed in one step.
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Affiliation(s)
- Seoyoung Cho
- Department of Chemistry, Duke University, Durham, NC, 27708, USA
| | - E J McLaren
- Department of Chemistry, Duke University, Durham, NC, 27708, USA
| | - Qiu Wang
- Department of Chemistry, Duke University, Durham, NC, 27708, USA
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