Addition reactions of heterocyclic compounds. Part 70. Formation of quinolizines and indolizines from nicotine derivatives and acetylenic esters
Abstract
Cotinine and other nicotine derivatives have been converted to 9aH- and 4H-quinolizines by dimethyl acetylenedicarboxylate, while cotinine itself by a series of steps has yielded 6-(1-methyl-5-oxopyrrolidin-2-yl)indolizine.