Catalyst-free electrochemical sulfonylation of amines with sulfonyl hydrazide in aqueous medium
作者:Wei Chen、Haojian Xu、Run Wu、Yang Chen、Pingbing Yu、Yanxi Jin
DOI:10.1039/d3ob00690e
日期:——
with sulfonyl hydrazides under exogenous-oxidant-free and catalyst-free conditions in aqueous medium was developed. A wide variety of sulfonamides were prepared via a simple electrochemical process from various cyclic or acyclic secondary amines, as well as more challenging free primary amines with equivalent amount of aryl/heteroaryl hydrazides in air under mild conditions. This protocol was found
开发了一种在水介质中、无外源氧化剂和无催化剂条件下,胺与磺酰肼的高效电化学磺酰化反应。在温和条件下,通过简单的电化学过程,由各种环状或无环仲胺以及更具挑战性的游离伯胺与等量的芳基/杂芳基酰肼在空气中制备了多种磺酰胺。该方案被发现在易于放大方面非常出色,并且在生物活性化合物的修饰/合成方面显示出巨大的潜力。通过一系列对照实验和CV研究对反应机理进行了研究,表明该反应可能经历了自由基途径。另外,n -Bu 4NBr 既作为支持电解质又作为氧化还原剂,从磺酰肼中产生磺酰自由基和磺酰阳离子。