TEMPO visible light photocatalysis: The selective aerobic oxidation of thiols to disulfides
作者:Hui Xu、Yu-Fei Zhang、Xianjun Lang
DOI:10.1016/j.cclet.2019.10.024
日期:2020.6
orangocatalysis that usually work in synergy with transition-metal catalysis or semiconductor photocatalysis. Here, TEMPO was turned into a visible light photocatalyst to conduct the selective aerobic oxidation of thiols into disulfides. With O2 as an oxidant, a mild and efficient protocol for the selective oxidation of thiols into disulfides including symmetrical and unsymmetrical ones with 5 mol% of TEPMO
摘要TEMPO(2,2,6,6-四甲基哌啶-1-氧基)在有机催化中已建立良好,通常与过渡金属催化或半导体光催化协同作用。在这里,TEMPO变成可见光光催化剂,将硫醇选择性好氧氧化为二硫化物。以O2为氧化剂,在室温下在460 nm蓝色LED的照射下,开发了一种温和而有效的方案,用于将硫醇选择性氧化为二硫化物,包括对称和不对称的硫醇,其中TEPMO为5 mol%。发现在TEMPO和硫醇之间形成的络合物加强了可见光活性,并且以非常高的分离产率获得了二硫化物。