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Zhu X, Li Y, Luo H, Li J, Hua Y, Liu G, Li L, Liu R. Propargylic Dialkyl Effect for Cyclobutene Formation through Ir(III)-Catalyzed Cycloisomerization of 1,6-Enynes. Org Lett 2024; 26:966-970. [PMID: 38270400 DOI: 10.1021/acs.orglett.3c04330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
The propargylic dialkyl effect (PDAE) has a significant impact on the cyclization reaction of enynes, partly reflected in changing the types of products. Herein, we described the influence of the propargylic dialkyl effect on the Ir(III)-catalyzed cycloisomerization of 1,6-enynes to provide strained cyclobutenes. A series of substituted 1,6-enynes were proved to be excellent substrate candidates in the presence of [Cp*IrCl2]2 in toluene. Mechanistic investigation, based on deuterium labeling experiments and control experiments, indicated that the propargylic dialkyl effect might boost C(sp)-H activation by preventing the coordination of active iridium species to the C(sp)≡C(sp) bond of enynes. This finding contributes to the fundamental understanding of enyne cyclization reactions and offers valuable insight into the propargylic dialkyl effect.
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Affiliation(s)
- Xuanyu Zhu
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Yi Li
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Hongtao Luo
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Jing Li
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Yuhui Hua
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Guohua Liu
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Lingling Li
- Instrumental Analysis Center of Shanghai Jiao Tong University, Shanghai 200240, China
| | - Rui Liu
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
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2
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Cao Y, Huang Y, He L. Sustainable Route Toward N-Boc Amines: AuCl 3 /CuI-Catalyzed N-tert-butyloxycarbonylation of Amines at Room Temperature. CHEMSUSCHEM 2022; 15:e202102400. [PMID: 34841655 DOI: 10.1002/cssc.202102400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/25/2021] [Indexed: 06/13/2023]
Abstract
N-tert-butoxycarbonyl (N-Boc) amines are useful intermediates in synthetic/medicinal chemistry. Traditionally, they are prepared via an indirect phosgene route with poor atom economy. Herein, a step- and atom-economic synthesis of N-Boc amines from amines, t-butanol, and CO was reported at room temperature. Notably, this N-tert-butyloxycarbonylation procedure utilized ready-made substrates, commercially available AuCl3 /CuI as catalysts, and O2 from air as the sole oxidant. This catalytic system provided unique selectivity for N-Boc amines in good yields. More significantly, gram-scale preparation of medicinally important N-Boc amine intermediates was successfully implement, which demonstrated a potential application prospect in industrial syntheses. Furthermore, this approach also showed good compatibility with tertiary and other useful alcohols. Investigations of the mechanisms revealed that gold catalyzed the reaction and copper acted as electron transfer mediator in the catalytic cycle.
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Affiliation(s)
- Yanwei Cao
- Department of Chemistry, Fudan University, Shanghai, 200438, P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation (OSSO), Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS), Lanzhou, 730000, P. R. China
| | - Yang Huang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation (OSSO), Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS), Lanzhou, 730000, P. R. China
| | - Lin He
- State Key Laboratory for Oxo Synthesis and Selective Oxidation (OSSO), Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS), Lanzhou, 730000, P. R. China
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Ge J, Wu H, Kong D, Huang G. Mechanism and Origins of Enantioselectivity of Cobalt-Catalyzed Intermolecular Hydroacylation/Cyclization of 1,6-Enynes with Aldehydes. Org Chem Front 2022. [DOI: 10.1039/d2qo00179a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory calculations were performed to investigate the cobalt-catalyzed intermolecular hydroacylation/cyclization of 1,6-enynes. The computations show that the initial oxidative cyclization constitutes the rate-determining step of the overall reaction....
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Wang G, Khan R, Liu H, Shen G, Yang F, Chen J, Zhou Y, Fan B. Cobalt-Catalyzed Ligand-Controlled Divergent Regioselective Reactions of 1,6-Enynes with Thiols. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00179] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gaowei Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Ruhima Khan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Haojie Liu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Guoli Shen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Fan Yang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Yongyun Zhou
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, China
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
| | - Baomin Fan
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, China
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, State Ethnic Affairs Commission & Ministry of Education, Kunming 650500, China
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Liu R, Chou Y, Lian B, Fang DC, Gao M, Cheng T, Liu G. Mechanistic Insights into the Ru(II)-Catalyzed Intramolecular Formal [3 + 2] Cycloaddition of ( E)-1,6-Enynes. Org Lett 2019; 21:6815-6820. [PMID: 31449425 DOI: 10.1021/acs.orglett.9b02446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Design of a unique reaction pathway in transition-metal-catalyzed 1,6-enynes cyclization to construct valuable synthetic motifs is a significant challenge in organic chemistry. Herein, we report a Ru(II)-catalyzed formal [3 + 2] cycloaddition as an efficient method to prepare unprecedented bicyclo[3.3.0]octenes from readily available (E)-1,6-enynes. Mechanistic studies based on the deuterium labeling experiments and the DFT calculation disclose a reasonable mechanistic pathway, where a ruthenacyclopentene generated by an ene-yne oxidative cyclization undergoes a sequential ß-hydride elimination and intramolecular hydroruthenation to form a ruthenacyclohexene, producing the desirable bicyclo[3.3.0]octenes.
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Affiliation(s)
- Rui Liu
- Laboratory of Resource Chemistry and Rare Earth Materials, Shanghai Normal University, Shanghai 200241, China
| | - Yajie Chou
- Laboratory of Resource Chemistry and Rare Earth Materials, Shanghai Normal University, Shanghai 200241, China
| | - Bing Lian
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - De-Cai Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ming Gao
- Laboratory of Resource Chemistry and Rare Earth Materials, Shanghai Normal University, Shanghai 200241, China
| | - Tanyu Cheng
- Laboratory of Resource Chemistry and Rare Earth Materials, Shanghai Normal University, Shanghai 200241, China
| | - Guohua Liu
- Laboratory of Resource Chemistry and Rare Earth Materials, Shanghai Normal University, Shanghai 200241, China
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Huang J, Hu X, Chen F, Gui J, Zeng W. Rhodium(i)-catalyzed vinylation/[2 + 1] carbocyclization of 1,6-enynes with α-diazocarbonyl compounds. Org Biomol Chem 2019; 17:7042-7054. [PMID: 31304502 DOI: 10.1039/c9ob01028a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sequential Rh(i)-catalyzed vinylation/[2 + 1]carbocyclization between enynes and diazo compounds has been developed. This transformation features a wide range of enynes and acceptor/acceptor diazo compounds, providing easy access to versatile vinyl-substituted azabicyclo[3.1.0]hexanes having a broad tolerance to functional groups.
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Affiliation(s)
- Junmin Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, Guangdong Engineering Research Center for Green Fine Chemicals, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
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Cabrera-Lobera N, Quirós MT, Buñuel E, Cárdenas DJ. Atom-economical regioselective Ni-catalyzed hydroborylative cyclization of enynes: development and mechanism. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02568a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We report a full study on the novel regioselective Ni-catalyzed hydroborylative cyclization of enynes using HBpin as the borylation agent.
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Affiliation(s)
- Natalia Cabrera-Lobera
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Institute for Advanced Research in Chemical Sciences (IAdChem)
- 28049-Madrid
| | - M. Teresa Quirós
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Institute for Advanced Research in Chemical Sciences (IAdChem)
- 28049-Madrid
| | - Elena Buñuel
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Institute for Advanced Research in Chemical Sciences (IAdChem)
- 28049-Madrid
| | - Diego J. Cárdenas
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Institute for Advanced Research in Chemical Sciences (IAdChem)
- 28049-Madrid
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Liu R, Tie Y, Zhao X, Zhu J, Zou J, Liu T. Mechanistic insight into the ruthenium-catalyzed cycloaddition of enynes with alkynes: A theoretical study. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Ying J, Wang H, Qi X, Peng JB, Wu XF. Gold-Catalyzed Regiospecific Hydration of N-Tosyl Propargylic Amines. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00549] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun Ying
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Hai Wang
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Xinxin Qi
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Jin-Bao Peng
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Straβe 29a, 18059 Rostock, Germany
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He T, Gao P, Fang S, Chi Y, Chen Y. Palladium-catalyzed cycloisomerisation reaction of 1,6-enyne acetic esters to form five-membered nitrogenated heterocyclic conjugated trienes. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.11.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Liu R, Giordano L, Tenaglia A. Ruthenium-Catalyzed [2+2+2] Cycloaddition of 1,6-Enynes and Unactivated Alkynes: Access to Ring-Fused Cyclohexadienes. Chem Asian J 2017. [PMID: 28628272 DOI: 10.1002/asia.201700642] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The [2+2+2] intermolecular carbocyclization reactions between 1,6-enynes and alkynes catalyzed by [RuCl(cod)(Cp*)] (cod=1,5-cyclooctadiene, Cp*=pentamethylcyclopentadienyl) are reported to provide bicyclohexa-1,3-dienes. The presented reaction conditions are compatible with internal and terminal alkynes and the chemo- and regioselectivity issues are controlled by the presence of substituents at the propargyl carbon center of the alkyne(s) partner(s).
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Affiliation(s)
- Rui Liu
- Aix-Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Laurent Giordano
- Aix-Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Alphonse Tenaglia
- Aix-Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
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Diao Y, Zuo Z, Wang H, Liu J, Luan X. Palladium(0)-catalyzed [2 + 2 + 1] cyclization of 1,6-enynes with vinyl bromides: a highly diastereoselective synthesis of tetrahydro-1H-cyclopenta[c]furans bearing two quaternary carbon centers. Org Biomol Chem 2017; 15:4601-4608. [PMID: 28509925 DOI: 10.1039/c7ob00768j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new cascade process has been accomplished for the synthesis of tetrahydro-1H-cyclopenta[c]furans through palladium-catalyzed [2 + 2 + 1] cyclization of 1,6-enynes with vinyl bromides. Notably, the key feature of this transformation is the use of vinyl bromides as the C1 building block. Various functionalized tetrahydro-1H-cyclopenta[c]furans bearing two quaternary carbon centers could be obtained in good yields with excellent diastereoselectivities.
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Affiliation(s)
- Yunxia Diao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127 China.
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