Synthesis of 6-Chromeno[4,3-]quinolin-7-ylphosphonates through Three Component Phosphonylation of Coumarin Carbaldehyde and Their Antimicrobial and Photophysical Properties.

Organophosphorylated coumarin derivatives were synthesized by a three-component reaction of 4-chloro-3-formylcoumarin, aromatic amines, and dialkyl phosphite in the presence of ZnCl. This process includes the formation of C(sp)-P and C(sp)-N bonds in one pot. The modular scope of the reaction allowed rapid access to a variety of 6-chromeno[4,3-]quinolin-7-ylphosphonate derivatives in good yields. Furthermore, photophysical studies of the products revealed their stimulating fluorescence properties.