An efficient methodology for the synthesis of 3-styryl coumarins

Abstract

Regioselective and highly efficient Heck arylation of 3-vinyl-6,7- dimethoxycoumarin has been developed to afford 3-styryl coumarins in good to very high yields. The increase in conjugation reflects on the absorbance of the synthesized compounds revealing all pronounced bathochromic shifts and hyperchromic effects. © 2012 Sociedade Brasileira de Química.