We report the synthesis of acyl hydrazides from acylsilanes in the presence of visible light without the aid of additives or transition metals. Acylsilanes underwent [1,2]-Brook rearrangement to generate the nucleophilic siloxycarbenes which on further addition to N═N of azodicarboxylates produced the acyl hydrazides. Control experiments indicate that the reaction proceeds through the singlet carbene
<scp>Visible‐Light‐Mediated Photocatalyst‐Free</scp> Hydroacylation of Azodicarboxylic Acid Derivatives with <scp>4‐Acyl</scp>‐1,4‐dihydropyridines
作者:Li Liu、Jing Wang、Xiaoying Feng、Kun Xu、Wei Liu、Xia Peng、Hongguang Du、Jiajing Tan
DOI:10.1002/cjoc.202300726
日期:——
azodicarboxylic acidderivatives was described. This radical conjugate addition (RCA) protocol relied on the dual role of 4-acyl-1,4-dihydropyridine (acyl-DHP) reagents that besides being as radical reservoirs, they also enabled the conversion of radical adducts to anion intermediates viareduction. Under “catalyst-oxidant-additive free” conditions, a wide range of structurally different acyl hydrazide products