Jt. Gupton et al., THE PREPARATION OF HETEROCYCLIC APPENDED VINYLOGOUS IMINIUM SALTS ANDTHEIR APPLICATION TO THE REGIOSELECTIVE PREPARATION OF BIHETEROCYCLICSYSTEMS, Heterocycles, 47(2), 1998, pp. 689-702
The synthesis of heterocyclic appended vinylogous iminium salts is des
cribed along with their conversion to heterocyclic appended pyrimidine
s, triazolopyrimidines, and pyrroles.