Pd-Catalyzed C–S Activation/Isocyanide Insertion/Hydrogenation Enables a Selective Aerobic Oxidation/Cyclization
作者:Jian Chang、Bangyu Liu、Yang Yang、Mang Wang
DOI:10.1021/acs.orglett.6b01780
日期:2016.8.19
isocyanides endows an unprecedented aerobic oxidation process. Catalyzed by Pd(Ph3P)2Cl2 in the presence of Ph3SiH under N2 then upon exposure to air, a wide range of α-acyl ketene dithioacetals react with isocyanides to afford 5-hydroxy-α,β-unsaturated γ-lactams via a C–S bond activation, isocyanide migratory insertion, hydrogenation, selective aerobic oxidation, and intramolecular nucleophilic addition
硫有机物与异氰酸酯的独特亚氨基化赋予了前所未有的好氧氧化过程。在N 2下,在Ph 3 SiH存在下,通过Pd(Ph 3 P)2 Cl 2催化,然后暴露于空气中,各种α-酰基烯酮二硫缩醛与异氰酸酯反应生成5-羟基-α,β-不饱和键γ-内酰胺通过C–S键活化,异氰酸酯迁移插入,氢化,选择性好氧氧化和分子内亲核加成序列。