The reactivity of 2-vinylindoles with dimethyl acetylenedicarboxylate
作者:R. Alan Jones、Pilar Martinez Fresneda、Teresa Aznar Saliente、José Sepúlveda Arques
DOI:10.1016/s0040-4020(01)91317-1
日期:1984.1
nes with dimethylacetylenedicarboxylate are considerably lower than those of the corresponding 2-vinyl- pyrroles. Steric interaction between the N-methyl group on the indole ring and the 1-substituent on the ethenyl group prevents the diene system adopting a coplanar configuration and, thereby, inhibits the π4 + π2 cycloaddition reaction of the system with dimethylacetylenedicarboxylate. Under such