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Zhu SS, Lv H, Yuan X, Guo K. Photocatalytic Tricyclization of Enediynes for the Synthesis of Chromenoquinolines in Continuous Flow. Org Lett 2024; 26:8910-8915. [PMID: 39373972 DOI: 10.1021/acs.orglett.4c03359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2024]
Abstract
A photocatalyzed radical-initiated tricyclization of enediynes was developed to synthesize a range of hitherto unknown sulfonated chromenoquinolines with moderate to excellent yields under continuous operational conditions. The reaction mechanism involves a complex series of steps including alkyl radical capture by sulfur dioxide (SO2), radical addition, 6-exo-dig/6-exo-dig/6-endo-trig tricyclization, and single electron transfer (SET). This cascade of reactions results in the direct formation of a pentacyclic framework structure, along with the creation of up to three new rings and five chemical bonds in a single step. This photocatalytic protocol exhibits a diverse substrate scope, remarkable tolerance to functional groups, and scalable adaptability.
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Affiliation(s)
- Shan-Shan Zhu
- Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Hao Lv
- Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Xin Yuan
- Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Kai Guo
- Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
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Deng KY, Xie ZZ, Yuan CP, Guan JP, Chen K, Xiang HY, Yang H. Photoinduced 1,5-HAT-enabled 1,7-hydrosulfonylation of allylic ethers and amides. Chem Commun (Camb) 2024; 60:11984-11987. [PMID: 39351683 DOI: 10.1039/d4cc03557g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2024]
Abstract
Herein, we report a photoinduced 1,7-hydrosulfonylation of allylic ethers and amides via a sequential Pd-mediated 1,5-HAT process and Pd-catalyzed allylic nucleophilic attack of arylsulfonates. This rationally designed synthetic protocol allows for facile construction of a series of structurally novel allylic sulfonated scaffolds, and features mild conditions, cheap and readily available raw materials and functional group compatibility.
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Affiliation(s)
- Ke-Yi Deng
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Zhen-Zhen Xie
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Chu-Ping Yuan
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Jian-Ping Guan
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Kai Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Hao-Yue Xiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Hua Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
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Mukherjee K, Cheung KPS, Gevorgyan V. Photoinduced Pd-Catalyzed Direct Sulfonylation of Allylic C-H Bonds. Angew Chem Int Ed Engl 2024:e202413646. [PMID: 39287933 DOI: 10.1002/anie.202413646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Revised: 09/12/2024] [Accepted: 09/16/2024] [Indexed: 09/19/2024]
Abstract
Allylic sulfones are valuable motifs due to their medicinal and biological significance and their versatile chemical reactivities. While direct allylic C-H sulfonylation represents a straightforward and desirable approach, these methods are primarily restricted to terminal alkenes, leaving the engagement of the internal counterparts a formidable challenge. Herein we report a photocatalytic approach that accommodates both cyclic and acyclic internal alkenes with diverse substitution patterns and electronic properties. Importantly, the obtained allylic sulfones can be readily diversified into a wide range of products, thus enabling formal alkene transposition and all-carbon quaternary center formation through the sequential C-H functionalization.
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Affiliation(s)
- Kallol Mukherjee
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas, 75080-3021, United States
| | - Kelvin Pak Shing Cheung
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas, 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas, 75080-3021, United States
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Huang H, Xu L, Zhang C, Cheng C, Chai Z, Yan H, Chen FE. Photoswitched Stereodivergent Synthesis of Allylic Sulfones. Org Lett 2024; 26:4916-4920. [PMID: 38821041 DOI: 10.1021/acs.orglett.4c01391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
The present Letter demonstrates a photoswitched stereodivergent synthesis of allylic sulfones from sodium sulfinates, triphenylvinylphosphonium chloride, and (hetero)aromatic aldehydes in a single step. Mechanistically, cis-allylic sulfones, generated from the unstabilized ylide intermediates and aldehydes in situ, could be finally converted to trans-allylic sulfones via photochemical isomerization in the presence of a catalytic amount of bis(2-thienyl) ketone.
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Affiliation(s)
- Huashan Huang
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou 362801, P. R. China
| | - Liuhui Xu
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou 362801, P. R. China
| | - Chunmei Zhang
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou 362801, P. R. China
| | - Changwu Cheng
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou 362801, P. R. China
| | - Zhi Chai
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
| | - Hong Yan
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou 362801, P. R. China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, P. R. China
| | - Fen-Er Chen
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou 362801, P. R. China
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
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Wang Y, Wu G, Yan K, Qin J, Liu R, Rong N, Tang Y, Loh TP, Xie P. Sulfination of Unactivated Allylic Alcohols via Sulfinate-Sulfone Rearrangement. Org Lett 2023. [PMID: 38059565 DOI: 10.1021/acs.orglett.3c03709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
A dehydrative cross-coupling of unactivated allylic alcohols with sulfinic acids was achieved under catalyst-free conditions. This reaction proceeded via allyl sulfination and concomitant allyl sulfinate-sulfone rearrangement. Various allylic sulfones could be obtained in good to excellent yields with water as the only byproduct. This study expands the synthetic toolbox for constructing allylic sulfone molecules.
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Affiliation(s)
- Yan Wang
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Guangming Wu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Kaiyu Yan
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jiaheng Qin
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Rui Liu
- Anhui JinTung Fine Chemical Co., Ltd, Cihu Economic & Technical Development Zone, Maanshan 243000, China
| | - Nannan Rong
- Anhui JinTung Fine Chemical Co., Ltd, Cihu Economic & Technical Development Zone, Maanshan 243000, China
| | - Yongming Tang
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology, Zhengzhou, 450001, China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Peizhong Xie
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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