View of 2,2â-Bipyridine: An efficient organo-catalyst for the synthesis of pyrano[2,3-d]pyrimidine and pyrido[2,3-d]pyrimidine derivatives | Iranian Journal of Catalysis

2,2â-Bipyridine: An efficient organo-catalyst for the synthesis of pyrano[2,3-d]pyrimidine and pyrido[2,3-d]pyrimidine derivatives