Photoredox Catalyzed Dealkylative Aromatic Halogen Substitution with Tertiary Amines
作者:Dmitry L. Lipilin、Alexander E. Frumkin、Alexey Y. Tyurin、Vitalij V. Levin、Alexander D. Dilman
DOI:10.3390/molecules26113323
日期:——
A reaction of aromatichalides bearing electron-withdrawing groups with tertiary amines in the presence of an iridium catalyst under blue light irradiation is described. Products of the aromatic substitution of the halide by the dialkylamino fragment are obtained. The interaction of aryl radicals with tertiary amines to generate zwitterionic radical species is believed to be the key factor responsible
tertiary amines as temporary masked secondary amines to synthesize 5-dialkylamino 1,2,4-oxadiazoles via Ph3P-I2 mediated amination of 1,2,4-oxadiazol-5(4H)-ones was developed. A one-step N-dealkylative functionalization of tertiary amines with the 1,2,4-oxadiazole ring enables a convenient access to diverse 5-amino-1,2,4-oxadiazoles. Additionally, orthogonally functionalizedpiperazinederivatives can be