Synthesis and characterization of 2-(methylthio)-6-oxo-6H-chromeno[3,4-e]pyrazolo[1,5-a]pyrimidine-3-carbonitrile derivatives
ABSTRACT Some new 2-(methylthio)-6-oxo-6H-chromenopyrazolopyrimidine-3-carbonitrile derivatives Having coumarine nucleus were synthesized by novel synthetic rout from 4-chloro 3-carbaldehyde coumarine derivatives and ...
