Nano crystalline ZnO catalyzed one pot three-component synthesis of 7-alkyl-6H,7H- naphtho[1',2':5,6]pyrano[3,2-c] chromen-6-ones under solvent-free conditions

M. J. Piltan, J. S. Ghomi
2016 Bulletin of the Chemical Society of Ethiopia  
In the present paper, an efficient one-pot synthesis of 7-alkyl-6H, 7H-naphtho[1',2':5,6]pyrano[3,2c]chromen-6-ones is described by three-component reaction of β-naphthol, aromatic aldehydes and 4hydroxycoumarin using ZnO nanoparticles under solvent-free conditions. The present method provides a novel and efficient procedure for the synthesis of chromene derivatives with some advantageous such as short reaction times, easy workup, high yields, wide range of products, reusability of the
more » ... ity of the catalyst, little catalyst loading and green conditions in the presence of ZnO nanoparticles (7 mol%) at 110 ºC.
doi:10.4314/bcse.v30i2.13 fatcat:a5qkuiltrbculmdsonkstajqq4