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Li S, An Y, Wang L, Chen Y, Huang J, Li T, Wen B, Chen X. Ligand-Accelerated, Copper-Catalyzed Aerobic Oxidative Dehydrogenation of Primary Amines to Nitriles. ACS OMEGA 2025; 10:11454-11462. [PMID: 40160799 PMCID: PMC11947809 DOI: 10.1021/acsomega.4c11496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2024] [Revised: 03/04/2025] [Accepted: 03/07/2025] [Indexed: 04/02/2025]
Abstract
A highly efficient copper-catalyzed oxidative dehydrogenation of primary amines to access nitriles has been developed. We found that DMAP was an efficient ligand for copper-catalyzed oxidation and molecular oxygen was a green oxidizing agent. This reaction exhibited excellent functional group compatibility and a broad substrate scope. Various benzylic, allylic, and aliphatic amines were selectively and effectively oxidized to the corresponding nitriles in high yields (up to 100%). The ligand DMAP not only accelerated the reaction rate but also enhanced the stability of the catalyst. The practicality of the reaction was illustrated on a gram scale, even at a lower catalyst loading and/or under bubble air conditions.
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Affiliation(s)
- Shiyun Li
- College
of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
- Qingyuan
Innovation Laboratory, Quanzhou 362801, China
| | - Yan An
- College
of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Lulu Wang
- College
of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Yu Chen
- College
of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Jun Huang
- Qingyuan
Innovation Laboratory, Quanzhou 362801, China
| | - Tiesen Li
- College
of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Bin Wen
- Qingyuan
Innovation Laboratory, Quanzhou 362801, China
| | - Xingquan Chen
- Qingyuan
Innovation Laboratory, Quanzhou 362801, China
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2
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Li D, Yan H, Zong Y, Xiao R, Li S, Xia H, Zhang Y, Duan YN, Chen GQ, Zhang X. Convergent Total Synthesis of Ixabepilone and Its Analogues Enabled by Highly Efficient Asymmetric Hydrogenations. Chemistry 2025; 31:e202404643. [PMID: 39731264 DOI: 10.1002/chem.202404643] [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: 12/17/2024] [Revised: 12/24/2024] [Accepted: 12/27/2024] [Indexed: 12/29/2024]
Abstract
The convergent total synthesis of ixabepilone and its analogues in a 13-step longest linear sequence is reported. The crucial chiral centers at challenging C3-O, C8-C and C15-N positions on the scaffold of the ixabepilone were installed via highly efficient asymmetric hydrogenations (up to 95 % yield and up to 99 % e.e.) and all three fragments could be prepared on gram scale. The key aldol reaction bridges the aldehyde and keto fragments with high yield and exquisite diastereo control (8 : 1 d.r.). Finally, a novel RCM reaction conformationally controlled by a bulky silyl group was reported, which allows the facile synthesis of ixabepilone and its analogues.
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Affiliation(s)
- Dong Li
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, China
| | - Hao Yan
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, China
| | - Yan Zong
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, China
| | - Renwei Xiao
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, China
| | - Shuo Li
- Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, China
| | - Haidong Xia
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, China
| | - Yao Zhang
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, China
| | - Ya-Nan Duan
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, China
| | - Gen-Qiang Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, China
| | - Xumu Zhang
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, China
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, China
- Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, China
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3
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Hamada S, Kubozono S, Sakamoto K, Yano K, Tanaka Y, Kobayashi Y, Furuta T. One-Pot, Telescoped Aryl Nitrile Synthesis from Benzylic Silyl Ethers. J Org Chem 2025; 90:1597-1604. [PMID: 39840449 DOI: 10.1021/acs.joc.4c02624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2025]
Abstract
A one-pot, telescoped transformation of silyl ethers into cyanides that proceeds via silyl-ether oxidation mediated by nitroxyl-radical catalyst 1 and [bis(trifluoroacetoxy)iodo]benzene followed by an imine formation-oxidation sequence using iodine and aqueous ammonia is reported. This transformation is effective for the site-selective transformation of benzylic and allylic silyl ethers in the presence of other silyl ethers. Using an O-protected oxime and a catalytic amount of triflic acid instead of iodine/aqueous ammonia is also effective for cyanation.
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Affiliation(s)
- Shohei Hamada
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa 920-1192, Japan
| | - Suzuka Kubozono
- Laboratory of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
| | - Kaori Sakamoto
- Laboratory of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
| | - Kyoko Yano
- Laboratory of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
| | - Yuka Tanaka
- Laboratory of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
| | - Yusuke Kobayashi
- Laboratory of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
| | - Takumi Furuta
- Laboratory of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
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4
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Arai S, Nakazawa K, Yang XF, Nakajima M, Harada S, Nishida A. Nickel-catalysed regio- and stereoselective hydrocyanation of alkynoates and its mechanistic insights proposed by DFT calculations. Org Biomol Chem 2024; 22:3606-3610. [PMID: 38629974 DOI: 10.1039/d4ob00380b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2024]
Abstract
We have developed a nickel-catalysed regio- and stereoselective hydrocyanation of alkynoates that gives syn-β-cyanoalkenes. DFT calculations suggest that a favored transition state promotes Cα-H bond formation for determining regio- and stereoselectivity of the products.
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Affiliation(s)
- Shigeru Arai
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
- Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Koichi Nakazawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
| | - Xiao-Fei Yang
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shinji Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
- Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
- Institute for Advanced Academic Research, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
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5
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Tian H, Ding CY, Liao RZ, Li M, Tang C. Cobalt-Catalyzed Acceptorless Dehydrogenation of Primary Amines to Nitriles. J Am Chem Soc 2024; 146:11801-11810. [PMID: 38626455 DOI: 10.1021/jacs.4c00493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
The direct double dehydrogenation from primary amines to nitriles without an oxidant or hydrogen acceptor is both intriguing and challenging. In this paper, we describe a non-noble metal catalyst capable of realizing such a transformation with high efficiency. A cobalt-centered N,N-bidentate complex was designed and employed as a metal-ligand cooperative dehydrogenation catalyst. Detailed kinetic studies, control experiments, and DFT calculations revealed the crucial hydride transfer, proton transfer, and hydrogen evolution processes. Finally, a tandem outer-sphere/inner-sphere mechanism was proposed for the dehydrogenation of amines to nitriles through an imine intermediate.
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Affiliation(s)
- Haitao Tian
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Cai-Yun Ding
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Rong-Zhen Liao
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Man Li
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Conghui Tang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
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Chen D, Xu L, Yu Y, Mo Q, Qi X, Liu C. Triflylpyridinium Enables Rapid and Scalable Controlled Reduction of Carboxylic Acids to Aldehydes using Pinacolborane. Angew Chem Int Ed Engl 2023; 62:e202215168. [PMID: 36378536 DOI: 10.1002/anie.202215168] [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: 10/15/2022] [Indexed: 11/16/2022]
Abstract
Building up new and efficient methods for the controlled conversion of carboxylic acids to aldehydes is important. Herein, we report a rapid, modular and scalable method for the conversion of carboxylic acids to aldehydes using pinacolborane at ambient temperature, in which a triflylpyridinium reagent is used. The conversion of carboxylic acid to intermediate acylpyridinium by triflylpyridinium is new. A binary pyridine-coordinated boronium complex is generated after reduction. The unprecedented reduction of the acylpyridinium by HBpin opens up a practically direct synthesis of aldehydes from carboxylic acids. Theoretical studies indicate that the reduction of acylpyridinium requires a lower activation free energy than that of the product aldehyde. The synthetic advantage of this protocol is further highlighted by the scalable synthesis of aldehyde via continuous flow process. Configuration retention for chiral acids are presented in those syntheses.
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Affiliation(s)
- Du Chen
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Liangxuan Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yi Yu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Qinliang Mo
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Xiaotian Qi
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
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7
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Xu J, Chen D, Liu C. Recent advances of aminoazanium salts as amination reagents in organic synthesis. Org Biomol Chem 2022; 20:8353-8365. [DOI: 10.1039/d2ob01312f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review summarizes the utilization of aminoazaniums as amination reagents in organic synthesis, including the amination of aldehydes, boronic esters, olefins, etc.
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Affiliation(s)
- Jianeng Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Du Chen
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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