DABCO-catalysed one-pot synthesis of furo[3,2-c]coumarin from 3-halochromone
A highly efficient synthesis of furo[3,2-c]coumarins have been achieved by a DABCO-catalysed reaction of 3-halochromones with 4-hydroxycoumarin. DABCO was found to be the most efficient catalyst among the different bases used for this reaction.
Synthesis of furo[3,2-c]coumarin from the reaction of 3-halochromone and 2-aminochromone; 2-aminochromone as a masked 4-hydroxycoumarin
Synthesis of 2-(2-hydroxybenzoyl)-4H-furo[3,2-c]chromen-4-one has been accomplished by the reaction of 3-halochromone with 2-aminochromone. In this reaction, 2-aminochromone acts as a masked 4-hydroxycoumarin.