New 2,7-disubstituted 5-amino-6,8-dicyano-2,3-dihydro-3-oxo thiazolo[3,2-a]
pyridines have been prepared. Their cyclization with formamide, nitrous aci
d and triethylorthoformate afforded a series of polycyclic heterocycles con
taining condensed pyrimidine and triazine rings. Antifungal tests were also
performed. (C) 2000 Elsevier Science S.A. All rights reserved.