Reaction of 2‐Imino‐2 H‐chromene‐3‐carboxamide with Phosphorus Isothiocyanates: First Synthesis of Novel Chromeno[2,3‐d]pyrimidinyl and Bis(chromeno[2,3‐d]pyrimidinyl)phosphines and Chromeno[2′,3′:4,5]pyrimido[2,1‐d][1,3,5,2]triazaphosphinine

Assiri, Mohammed A.; Ali, Tarik E.; Hassanin, Noha M.; Yahia, I. S.; Saker, Gamal;