The Cu-catalyzed aerobic oxidative esterification of simple ketones via C-C bond cleavage has been developed. Varieties of common ketones, even inactive aryl long-chain alkyl ketones, are selectively converted into esters. The reaction tolerates a wide range of alcohols, including primary and secondary alcohols, chiral alcohols with retention of the configuration, electron-deficient phenols, as well
已经开发了通过 CC 键裂解的 Cu 催化的简单酮的有氧氧化酯化。各种常见的酮,甚至是惰性的芳基长链烷基酮,都被选择性地转化为酯。该反应耐受多种醇,包括伯醇和仲醇、保留构型的手性醇、缺电子酚以及各种天然醇。使用廉价的铜催化剂、广泛的基材范围以及中性和露天条件使该协议非常实用。(18)O 标记实验表明,在这种转化过程中发生了氧化作用。初步机制研究表明,该过程主要涉及两条新途径。
Brønsted Acid Mediated Nucleophilic Functionalization of Amides through Stable Amide C−N Bond Cleavage; One‐Step Synthesis of 2‐Substituted Benzothiazoles
作者:Srabani Maity、Arnab Roy、Surajit Duari、Subrata Biswas、Asma M. Elsharif、Srijit Biswas
DOI:10.1002/ejoc.202100645
日期:2021.7.7
A TFA mediated general and simple synthetic protocol to directly cleave stable amide C−N bonds by a variety of alcohol and amine nucleophiles has been developed. Natural alcohols such as menthol and cholesterol took part in the reaction under the present reaction conditions to generate the desired esters. Structurally important 2-substituted benzothiazole derivatives have been synthesized in one pot
Cu(<scp>ii</scp>)-catalyzed esterification reaction via aerobic oxidative cleavage of C(CO)–C(alkyl) bonds
作者:Ran Ma、Liang-Nian He、An-Hua Liu、Qing-Wen Song
DOI:10.1039/c5cc09146b
日期:——
Novel Cu(II)-catalyzed aerobic oxidative esterification of simple ketones for the synthesis of esters has been developed with wide functional group tolerance. This process is assumed to go through a tandem...
Cu-Catalyzed Esterification Reaction via Aerobic Oxygenation and C–C Bond Cleavage: An Approach to α-Ketoesters
作者:Chun Zhang、Peng Feng、Ning Jiao
DOI:10.1021/ja4085463
日期:2013.10.9
The Cu-catalyzed novel aerobic oxidativeesterification reaction of 1,3-diones for the synthesis of α-ketoesters has been developed. This method combines C-C σ-bond cleavage, dioxygen activation and oxidative C-H bond functionalization, as well as provides a practical, neutral, and mild synthetic approach to α-ketoesters which are important units in many biologically active compounds and useful precursors
已开发出用于合成 α-酮酯的 Cu 催化的新型 1,3-二酮有氧氧化酯化反应。该方法结合了 CC σ-键裂解、双氧活化和氧化 CH 键功能化,并为 α-酮酯提供了一种实用、中性和温和的合成方法,α-酮酯是许多生物活性化合物中的重要单元和各种有用的前体。功能组转换。在机理研究的基础上提出了一个合理的激进过程。
Sodium cyanide‐promoted copper‐catalysed aerobic oxidative synthesis of esters from aldehydes
作者:Najmeh Nowrouzi、Mohammad Abbasi、Maryam Bagheri
DOI:10.1002/aoc.3766
日期:2017.11
A simple and efficient copper‐catalysed procedure for oxidativeesterification of aldehydes with alcohols and phenols mediated by sodium cyanide, using air as a clean oxidant, is described. A variety of aromaticaldehydes and structurally different alcohols and phenols reacted efficiently, and the product esters were obtained in good to excellent yields under normal atmospheric and solvent‐free conditions