Synthesis of partially hydrogenated 1,2,4-triazoloquinazolines by condensation of 3,5-diamino-1,2,4-triazole with aromatic aldehydes and dimedone

Article abstract of DOI:10.1007/s11178-005-0131-0

Three-component condensation of 3,5-diamino-1,2,4-triazole with aromatic aldehydes and dimedone in dimethylformamide gives 2-amino-5-aryl-8,8-dimethyl-5, 6,7,8,9,10-hexahydro[1,2,4]triazolo[3,2-b]quinazolin-6-ones. The reaction of 3,5-diamino-1,2,4-triazole with dimedone in the absence of aldehyde involves dimethylformamide as one of the carbonyl components to afford 2-amino-8,8-dimethyl-6,7,8,9-tetrahydro[1,2,4]triazolo[2,3-a]quinazolin-6-one. 2005 Pleiades Publishing, Inc.