1
|
Yuan M, Lou M, Li G, Qi X. Triflic Anhydride Promoted Decarboxylative Functionalization of α-Amino Acids. Org Lett 2024; 26:7382-7386. [PMID: 39177205 DOI: 10.1021/acs.orglett.4c02589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
The decarboxylation of naturally abundant amino acids, followed by subsequent inter- or intramolecular reaction cascades, enables the rapid synthesis of a variety of diverse and high-value amine derivatives. Previous methods have relied heavily on transition metals, involved tedious procedures, or required harsh conditions. Herein, we present a novel reaction cascade for the decarboxylation and nucleophilic functionalization of α-amino acids. This method is characterized by being transition-metal-free, convenient to operate, environmentally friendly and having mild conditions.
Collapse
Affiliation(s)
- Mingyue Yuan
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, People's Republic of China
- National Institute of Biological Sciences, Beijing 102206, People's Republic of China
| | - Mingliang Lou
- National Institute of Biological Sciences, Beijing 102206, People's Republic of China
| | - Gen Li
- National Institute of Biological Sciences, Beijing 102206, People's Republic of China
| | - Xiangbing Qi
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, People's Republic of China
- National Institute of Biological Sciences, Beijing 102206, People's Republic of China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 100084, People's Republic of China
| |
Collapse
|
2
|
Kataoka K, Wachi K, Jin X, Suzuki K, Sasano Y, Iwabuchi Y, Hasegawa JY, Mizuno N, Yamaguchi K. CuCl/TMEDA/nor-AZADO-catalyzed aerobic oxidative acylation of amides with alcohols to produce imides. Chem Sci 2018; 9:4756-4768. [PMID: 29910926 PMCID: PMC5982222 DOI: 10.1039/c8sc01410h] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/05/2018] [Indexed: 01/25/2023] Open
Abstract
Although aerobic oxidative acylation of amides with alcohols would be a good complement to classical synthetic methods for imides (e.g., acylation of amides with activated forms of carboxylic acids), to date, there have been no reports on oxidative acylation to produce imides. In this study, we successfully developed, for the first time, an efficient method for the synthesis of imides through aerobic oxidative acylation of amides with alcohols by employing a CuCl/TMEDA/nor-AZADO catalyst system (TMEDA = teramethylethylendiamine; nor-AZADO = 9-azanoradamantane N-oxyl). The proposed acylation proceeds through the following sequential reactions: aerobic oxidation of alcohols to aldehydes, nucleophilic addition of amides to the aldehydes to form hemiamidal intermediates, and aerobic oxidation of the hemiamidal intermediates to give the corresponding imides. This catalytic system utilizes O2 as the terminal oxidant and produces water as the sole by-product. An important point for realizing this efficient acylation system is the utilization of a TMEDA ligand, which, to the best of our knowledge, has not been employed in previously reported Cu/ligand/N-oxyl systems. Based on experimental evidence, we consider that plausible roles of TMEDA involve the promotion of both hemiamidal oxidation and regeneration of an active CuII-OH species from a CuI species. Here promotion of hemiamidal oxidation is particularly important. Employing the proposed system, various types of structurally diverse imides could be synthesized from various combinations of alcohols and amides, and gram-scale acylation was also successful. In addition, the proposed system was further applicable to the synthesis of α-ketocarbonyl compounds (i.e., α-ketoimides, α-ketoamides, and α-ketoesters) from 1,2-diols and nucleophiles (i.e., amides, amines, and alcohols).
Collapse
Affiliation(s)
- Kengo Kataoka
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan .
| | - Keiju Wachi
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan .
| | - Xiongjie Jin
- Department of Chemistry and Biotechnology , School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan .
| | - Kosuke Suzuki
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan .
| | - Yusuke Sasano
- Department of Organic Chemistry , Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-Aoba, Aramaki, Aoba-ku , Sendai 980-8578 , Japan
| | - Yoshiharu Iwabuchi
- Department of Organic Chemistry , Graduate School of Pharmaceutical Sciences , Tohoku University , 6-3 Aza-Aoba, Aramaki, Aoba-ku , Sendai 980-8578 , Japan
| | - Jun-Ya Hasegawa
- Institute for Catalysis , Hokkaido University , Kita 21 Nishi 10 , Kita-ku , Sapporo 001-0021 , Japan
| | - Noritaka Mizuno
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan .
| | - Kazuya Yamaguchi
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan .
| |
Collapse
|