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。
enzene. Acid fluorides were converted into acylphosphine sulfides and thioesters using diphosphine disulfides and disulfides/triphenylphosphine, respectively. Aryl esters were obtained fromacid fluorides and phenols in the presence of triphenylsilane. Aryl esters, acylphosphine sulfides, and thioesters were also interconverted in the presence of rhodium complexes. These rhodium-catalyzed acyl transfer
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