A facile one-pot synthesis of novel substituted 1,2,3,4-tetrahydropyrimidines part 5: Synthesis of bis[(1-alkyl/aralkyl)-5-benzoyl-6-methylthio-1,2,3,4-tetrahydropyrimidinyl]alkane and benzene, bis[3-phenyl-7-mehtyl-4,5,6,7-tetrahydropyrazolo[3,4-d]-

摘要

Bis-1,2,3,4-tetrahydropyrimidinylalkanes/benzenes 2a-f have been synthesized by the reaction of N,S-acetals with formaldehyde and diamines. Reaction of pyrazoles 3a and 3b with diamines and formaldehyde yield bis-4,5,6,7-tetrahydropyrazolo[3,4-d]pyrimidinylalkanes 4a-b and bis-1,2,3,4-tetrahydropyrazolo[1,5a]triazinylalkanes and benzene 5a-c respectively in good yields.