Research Article

A Facile Synthesis of Pyrido[ , :3,4]pyrazolo[1,5-a]pyrimidine and Pyrido[ , :3,4]pyrazolo[5,1-c][1,2,4]triazine Bearing a Thiophene Moiety

Scheme 2

Synthetic pathway to achieve pyrido[2′,3′:3,4]pyrazolo[1,5-a]pyrimidines 14, 15 and 17.
463515.sch.002