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Piñeiro-Suárez M, Álvarez-Constantino AM, Fañanás-Mastral M. Copper-Catalyzed Enantioselective Borylative Allyl-Allyl Coupling of Allenes and Allylic gem-Dichlorides. ACS Catal 2023; 13:5578-5583. [PMID: 37123595 PMCID: PMC10127276 DOI: 10.1021/acscatal.3c00536] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/03/2023] [Indexed: 05/02/2023]
Abstract
A catalytic asymmetric reaction between allenes, bis(pinacolato)diboron, and allylic gem-dichlorides is reported. The method involves the coupling of a catalytically generated allyl copper species with the allylic gem-dichloride and provides chiral internal 1,5-dienes featuring (Z)-configured alkenyl boronate and alkenyl chloride units with high levels of chemo-, regio-, enantio-, and diastereoselectivity. The synthetic utility of the products is demonstrated with the synthesis of a range of optically active compounds. DFT calculations reveal key noncovalent substrate-ligand interactions that account for the enantioselectivity outcome and the diastereoselective formation of the (Z)-alkenyl chloride.
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Jung Y, Yoo SY, Jin Y, You J, Han S, Yu J, Park Y, Cho SH. Iridium-Catalyzed Chemo-, Diastereo-, and Enantioselective Allyl-Allyl Coupling: Accessing All Four Stereoisomers of (E)-1-Boryl-Substituted 1,5-Dienes by Chirality Pairing. Angew Chem Int Ed Engl 2023; 62:e202218794. [PMID: 36718077 DOI: 10.1002/anie.202218794] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/29/2023] [Accepted: 01/30/2023] [Indexed: 02/01/2023]
Abstract
Here, we report a highly chemo-, diastereo-, and enantioselective allyl-allyl coupling between branched allyl alcohols and α-silyl-substituted allylboronate esters, catalyzed by a chiral iridium complex. The α-silyl-substituted allylboronate esters can be chemoselectively coupled with allyl electrophiles, affording a diverse set of enantioenriched (E)-1-boryl-substituted 1,5-dienes in good yields, with excellent stereoselectivity. By permuting the chiral iridium catalysts and the substrates, we efficiently and selectively obtained all four stereoisomers bearing two consecutive chiral centers. Mechanistic studies via density functional theory calculations revealed the origins of the diastereo- and chemoselectivities, indicating the pivotal roles of the steric interaction, the β-silicon effect, and a rapid desilylation process. Additional synthetic modifications for preparing a variety of enantioenriched compounds containing contiguous chiral centers are also included.
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Affiliation(s)
- Yongsuk Jung
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Seok Yeol Yoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea
| | - Yonghoon Jin
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Jaehyun You
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea
| | - Seungcheol Han
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Jeongwoo Yu
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Yoonsu Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea
| | - Seung Hwan Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
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Lv L, Qian H. Developments and applications of allyl-(aza)allyl coupling reactions. GREEN SYNTHESIS AND CATALYSIS 2023. [DOI: 10.1016/j.gresc.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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Zeng Y, Yang H, Du J, Huang Q, Huang G, Xia Y. Rh-catalyzed regio-switchable cross-coupling of gem-difluorinated cyclopropanes with allylboronates to structurally diverse fluorinated dienes. Chem Sci 2022; 13:12419-12425. [PMID: 36382270 PMCID: PMC9629036 DOI: 10.1039/d2sc04118a] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 10/04/2022] [Indexed: 09/23/2023] Open
Abstract
The control of linear/branched selectivity is one of the major focuses in transition-metal catalyzed allyl-allyl cross-coupling reactions, in which bond connection occurs at the terminal site of both the allyl fragments forming different types of 1,5-dienes. Herein, terminal/internal regioselectivity is investigated and found to be switchable in allyl-allyl cross-coupling reactions between gem-difluorinated cyclopropanes and allylboronates. The controlled terminal/internal regioselectivity arises from the fine-tuning of the rhodium catalytic system. Fluorinated 1,3-dienes, 1,4-dienes and 1,5-dienes are therefore produced in good yields with respectively isomerized terminal, internal, and terminal regioselectivity.
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Affiliation(s)
- Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
| | - Hui Yang
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
| | - Jiayi Du
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
| | - Qin Huang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University Beijing 100084 China
| | - Guoliang Huang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University Beijing 100084 China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
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Chauhan ANS, Mali G, Erande RD. Regioselectivity Switch Towards the Development of Innovative Diels‐Alder Cycloaddition and Productive Applications in Organic Synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Amar Nath Singh Chauhan
- IIT Jodhpur: Indian Institute of Technology Jodhpur Chemistry Chemistry departmentIIT Jodhpur 342037 Jodhpur INDIA
| | - Ghanshyam Mali
- IIT Jodhpur: Indian Institute of Technology Jodhpur chemistry Chemistry departmentIIT Jodhpur 342037 Jodhpur INDIA
| | - Rohan D. Erande
- Indian Institute of Technology Jodhpur Chemistry Office 103, Department of Chemistry, IIT Jodhpur, N.H. 62, Nagaur Road, Karwar 342037 Jodhpur INDIA
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