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Duan Y, Zhang K, Xing T, Bai Y, Li J, Yang X, Zhao Y, Zhang Q. Metal-free photoinduced generation and alkynylation of carbamoyl radicals: a facile synthesis of alkynyl amides. Chem Commun (Camb) 2024. [PMID: 39140217 DOI: 10.1039/d4cc01619j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
A metal-free photoinduced alkynylation of carbamoyl radicals with hypervalent iodine(III) reagents for a facile synthesis of alkynyl amides is described. This protocol features good functional group tolerance and a broad substrate scope for direct synthesis of alkynyl amide derivatives in good to excellent yields under mild and redox-neutral reaction conditions. The synthetic application is demonstrated by the late-stage installation of alkynyl amides into natural products and active pharmaceutical relevant molecules. The mechanistic studies indicated the simultaneous existence of photoredox catalytic and direct photoexcited processes, and the quantum yields confirmed the occurrence of the radical chain propagation process.
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Affiliation(s)
- Yurong Duan
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
| | - Kai Zhang
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Tongtong Xing
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
| | - Yubin Bai
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
| | - Jinfeng Li
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
| | - Xiaojun Yang
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
| | - Yu Zhao
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
- Xi'an Key Laboratory of Functional Organic Porous Materials, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Qiuyu Zhang
- Xi'an Key Laboratory of Functional Organic Porous Materials, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, China
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Arango-Daza JC, Cabrero-Antonino JR, Adam R. A General and Highly Versatile Heterogeneous Pd-Catalyzed Oxidative Aminocarbonylation of Alkynes with Aromatic and Aliphatic Amines. CHEMSUSCHEM 2024; 17:e202400331. [PMID: 38695852 DOI: 10.1002/cssc.202400331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/15/2024] [Indexed: 06/12/2024]
Abstract
An efficient heterogeneous catalytic system for the oxidative aminocarbonylation of alkynes and amines in the presence of CO/O2 to afford substituted propiolamides has been developed. The active nanocatalyst, [Pd/Mg3Al-LDH]-300(D), is composed by Pd nanoaggregates (2-3 nm average particle size) stabilized over a partially dehydrated [Mg3Al-LDH] matrix. The methodology has resulted widely applicable, being the first catalytic system, either homogeneous or heterogeneous, able to activate not only aliphatic amines but also poorly-nucleophilic aromatic amines. In fact, >60 substituted propiolamides have been synthesized in good to excellent isolated yields through this methodology, being 27 novel compounds. An important characterization effort (XRD, 27Al MAS NMR, TGA, TPD-CO2, BET area, XPS, HAADF-HRSTEM and HRTEM) and optimization of the synthesis conditions of the optimal catalyst has been performed. This study, together with a series of kinetic and mechanistic essays, indicates that the optimal catalyst is composed by Pd(0) species stabilized in a partially dehydrated/dehydroxylated LDH material with a Mg/Al molar ratio of 3 and a small crystallite size. All the experimental data indicates that the in situ formation of [PdI2] active species in the material surface together with the presence of a matrix with the optimal acid/base properties are key aspects of this process.
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Affiliation(s)
- Juan Camilo Arango-Daza
- Instituto de Tecnología Química, Universitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, València, Spain
| | - Jose R Cabrero-Antonino
- Instituto de Tecnología Química, Universitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, València, Spain
| | - Rosa Adam
- Departament de Química Orgànica, Facultat de Farmàcia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100, Burjassot, València, Spain
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Suga M, Fukushima S, Makino K, Nakamura K, Tabata H, Oshitari T, Natsugari H, Kuroda N, Kanemaru K, Oda Y, Takahashi H. Isomerization of E-Cinnamamides into Z-Cinnamamides Using a Recycling Photoreactor. J Org Chem 2024; 89:8836-8844. [PMID: 38836790 PMCID: PMC11197087 DOI: 10.1021/acs.joc.4c00721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/10/2024] [Accepted: 05/21/2024] [Indexed: 06/06/2024]
Abstract
The photocatalytic synthesis of thermodynamically less-stable Z-alkenes has received considerable research attention in recent years. In this study, a recycling photoreactor was applied to the photoisomerization of E-alkenes (cinnamamide and Weinreb amide derivatives) to produce Z-alkenes. The closed-loop recycling system comprises an immobilized photosensitizer to achieve rapid photoisomerization and a high-performance liquid chromatography instrument for separation of the Z/E diastereomers. After 4-10 cycles, the desired pure Z-alkenes were obtained efficiently. In the photoreactor system, a photosensitizer (thioxanthone) was covalently immobilized on silica gel via amide bonding, which led to an enhanced photocatalytic activity compared to the parent thioxanthone. This recycling photoreactor shows promise as an alternative system for the production of Z-alkenes.
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Affiliation(s)
- Mayuko Suga
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Saki Fukushima
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Kosho Makino
- Research
Institute of Pharmaceutical Sciences, Musashino
University, Nishitokyo, Tokyo 202-8585, Japan
| | - Kayo Nakamura
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Hidetsugu Tabata
- Faculty
of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Tetsuta Oshitari
- Faculty
of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Hideaki Natsugari
- Graduate
School of Pharmaceutical Science, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Noritaka Kuroda
- YMC
Company Limited, 284 Daigo, Karasuma Nishiiru Gojo-dori, Shimogyo-ku, Kyoto 600-8106, Japan
| | - Kunio Kanemaru
- IWASAKI
Electric Company Limited, 1-1, Ichiriyama-cho, Gyoda-shi, Saitama 361-8505, Japan
| | - Yuji Oda
- IWASAKI
Electric Company Limited, 1-1, Ichiriyama-cho, Gyoda-shi, Saitama 361-8505, Japan
| | - Hideyo Takahashi
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
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Gregori BJ, Schmotz MWS, Jacobi von Wangelin A. Stereoselective Semi-Hydrogenations of Alkynes by First-Row (3d) Transition Metal Catalysts. ChemCatChem 2022; 14:e202200886. [PMID: 36632425 PMCID: PMC9825939 DOI: 10.1002/cctc.202200886] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/25/2022] [Indexed: 01/14/2023]
Abstract
The chemo- and stereoselective semi-hydrogenation of alkynes to alkenes is a fundamental transformation in synthetic chemistry, for which the use of precious 4d or 5d metal catalysts is well-established. In mankind's unwavering quest for sustainability, research focus has considerably veered towards the 3d metals. Given their high abundancy and availability as well as lower toxicity and noxiousness, they are undoubtedly attractive from both an economic and an environmental perspective. Herein, we wish to present noteworthy and groundbreaking examples for the use of 3d metal catalysts for diastereoselective alkyne semi-hydrogenation as we embark on a journey through the first-row transition metals.
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Affiliation(s)
- Bernhard J. Gregori
- Dept. of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
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Nakano T, Liu Y, Wang XF, Tamiaki H. Synthesis of chlorophyll-a derivative inserting an ethynylene group between the carboxylic acid moiety and chlorin π-skeleton and its photosensitizing efficiency in dye-sensitized solar cell. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Torres-Calis A, García JJ. Manganese-catalyzed transfer semihydrogenation of internal alkynes to E-alkenes with iPrOH as hydrogen source. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00246a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The Mn-catalyzed transfer semihydrogenation of internal alkynes to E-alkenes is reported herein, along with Mn-catalyzed hydration of α-keto alkynes. Mechanistic studies displayed an asymmetrical Mn-hydride species performing the catalytic turnover.
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Affiliation(s)
- Antonio Torres-Calis
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
| | - Juventino J. García
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
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