Via an imine-protection strategy, we herein present an unprecedented copper-catalyzed oxidative multicomponent annulation reaction for directsynthesis of quinazolinones. The construction of various products is achieved via formation of three C–N and one C–C bonds in conjunction with the benzylic functionalization. The merits of easily available feedstocks, naturally abundant catalyst, good functional
Pd/C as an efficient heterogeneous catalyst for carbonylative four-component synthesis of 4(3H)-quinazolinones
作者:Kishore Natte、Helfried Neumann、Xiao-Feng Wu
DOI:10.1039/c5cy00907c
日期:——
activated charcoal (Pd/C) as a heterogeneous catalyst was investigated for the carbonylation of 2-iodoanilines with trimethyl orthoformate and amines via a multicomponent reaction approach, which provided excellent yields of 4(3H)-quinazolinones. It avoids the use of expensive phosphine ligands with an additional advantage of catalyst recovery. Furthermore, >5 new quinazolinone scaffolds containing the trifluoroethyl