Sa. Petrich et al., THE APPLICATION OF UNSYMMETRICAL VINYLOGOUS IMINIUM SALTS AND RELATEDSYNTHONS TO THE PREPARATION OF MONOSUBSTITUTED TRIAZOLO[1,5-A]PYRIMIDINES, Tetrahedron, 50(42), 1994, pp. 12113-12124
The reaction of vinylogous iminium salts and related analogs with 3-am
ino-1,2,4-triazole to yield 7-substituted and 5-substituted triazolo[1
,5-a]pyrimidines is described.