Synthesis and Transformations of Some Pyridopyrimidines

Article abstract of DOI:10.1007/BF00809951

A new synthetic approach for pyrido<2,3-d>pyrimidine 3-oxides and other pyrido<2,3-d>pyrimidines has been developed.This bicyclic system readily undergoes ring opening to give a variety of products, depending on the reagent and reaction conditions. - Keywords: Cyclization with C-N or C-O bond formation; Ring opening; Substituted pyridines; Substituted 1,2,4-oxadiazoles