C(sp<sup>3</sup>
)−H Cyanation Promoted by Visible-Light Photoredox/Phosphate Hybrid Catalysis
作者:Takayuki Wakaki、Kentaro Sakai、Takafumi Enomoto、Mio Kondo、Shigeyuki Masaoka、Kounosuke Oisaki、Motomu Kanai
DOI:10.1002/chem.201801746
日期:2018.6.7
reaction mechanism of photo‐induced DNA cleavage in nature, a C(sp3)−H cyanation reaction promoted by visible‐light photoredox/phosphate hybrid catalysis was developed. Phosphate radicals, generated by one‐electron photooxidation of phosphate salt, functioned as a hydrogen‐atom‐transfer catalyst to produce nucleophilic carbon radicals from C(sp3)−H bonds with a high bond‐dissociation energy. The resulting
受自然界中光诱导的DNA裂解反应机制的启发,开发了由可见光光氧化还原/磷酸盐混合催化促进的C(sp 3)-H氰化反应。磷酸根盐的单电子光氧化产生的磷酸根基团起着氢原子转移催化剂的作用,从具有高键解离能的C(sp 3)-H键产生亲核碳根基。产生的碳自由基被氰基自由基源(TsCN)捕获,生成CH氰化产物。由于氰基的高功能基团耐受性和多功能性,该反应对于实现简化的构建基合成和药物样分子的后期功能化非常有用。