A Rh(<scp>iii</scp>)-catalyzed cascade C–H functionalization/cyclization reaction of salicylaldehydes with diazomalonates for the synthesis of 4-hydroxycoumarin derivatives
作者:Guo-Dong Xu、Zhi-Zhen Huang
DOI:10.1039/c8nj04576c
日期:——
A cascadeC–H functionalization/cyclization reaction of salicylaldehydes with α-diazomalonates has been developed for the synthesis of 4-hydroxycoumarin derivatives under the catalysis of rhodium(III) and in the presence of acetic acid. A plausible mechanism involving aldehydic C(sp2)–H activation by rhodium(III) and rhodium(III) catalyzed carbene insertion is also proposed.