coupling of readily available aroylhydrazides with disulfides is developed, in which oxidative expulsion of N2 overcomes the activation barrier between the carboxylic acidderivatives and the products. The reaction produces various thioesters in good to excellent yields with good functional group tolerance. In the reaction, stable and easily available aroylhydrazides are used as acyl sources and the
通过易得的芳酰肼与二硫化物的铜催化的氧化偶联,开发了另一种硫酯化反应,其中N 2的氧化排出克服了羧酸衍生物和产物之间的活化障碍。该反应以良好的收率和优异的官能度耐受性产生了各种硫酯。在该反应中,将稳定且容易获得的芳酰基酰肼用作酰基源,并将相对无味的二硫化物用作S源。机理研究表明,铜盐与氧化剂(NH 4)2 S 2 O 8的反应 可以实现串联过程,包括去质子化,自由基介导的脱氮和CS键形成。
Nickel-catalyzed carbonylation of thioacetates with aryl iodides via CO insertion and C–S bond cleavage
作者:Wen-Peng Mai、Hong-Da Sui、Ming-Xiu Lv、Kui Lu
DOI:10.1177/17475198211028114
日期:2021.9
Aryl thioesters are synthesized via nickel-catalyzed carbonylation of thioacetates with aryliodides. Alkyl thioacetates undergo coupling with carbon monoxide and aryliodides to produce the desired aryl thioesters in moderate yields. This catalytic carbonylative coupling process provides a cost-effective and direct approach for the preparation of useful thioesters.
Synthesis of Thioesters by Simultaneous Activation of Carboxylic Acids and Alcohols Using PPh<sub>3</sub>/NBS with Benzyltriethylammonium Tetrathiomolybdate as the Sulfur Transfer Reagent
A new and simple route for the synthesis of thioesters starting from carboxylicacids and alcohols is reported by usingtetrathiomolybdate as the key sulfurtransferreagent. Triphenylphosphane and N-bromosuccinimide were used for the activation of the carboxylicacid and alcohol in the same pot followed by the transfer of sulfur from tetrathiomolybdate. Thioesters were obtained in good to moderate
Palladium-catalyzed convenient synthesis of thioesters from carboxylic acids and disulfides
作者:Yong-Mei Xiao、Yu Zhao、Jia-Qi Li、Jin-Wei Yuan、Liang-Ru Yang、Pu Mao、Wen-Peng Mai
DOI:10.1039/d3nj02972g
日期:——
A novel palladium-catalyzed convenientsynthesis of thioesters from various carboxylic acids and disulfides has been developed. Both aryl and alkyl carboxylic acids are capable of coupling with diaryl or dialkyl disulfides to afford the desirable thioesters in moderate to good yields. This methodology features easy accessibility of starting materials and a broad substrate scope, providing a practical
A solvent-free synthesis of (thio)ester derivatives using FeCl3 as a heterogeneous catalyst
作者:Sabry H.H. Younes、F. Hollmann
DOI:10.1016/j.tetlet.2023.154524
日期:2023.6
A simple, solvent-free method for the synthesis of (thio)esters from simple acid chlorides at room temperature is reported. Simple FeCl3 (5 mol%) enables facile, near complete conversion of equimolar starting materials in high selectivity. Recycling of the catalyst has been demonstrated.