An efficient ZrCl4 catalyzed one-pot solvent free protocol for the synthesis of 4-substituted coumarins
摘要:
A versatile and efficient route to 4-substituted cournarins via a Pechmann reaction using ZrCl4 as the catalyst (10 mol %) is described. This method provides several advantages over alternative procedures such as mild, solvent-free conditions at ambient temperature, and direct isolation of the products in high yields. (c) 2005 Published by Elsevier Ltd.
Synthesis of pyrano[2,3-f]chromen-2,8-diones and pyrano[3,2-g]chromen-2,8-diones based on o-hydroxyformyl(acyl)neoflavonoids
作者:V. S. Moskvina、V. P. Khilya
DOI:10.1007/s10600-008-0006-z
日期:2008.1
Novel pyrano[2,3-f]chromen-2,8-diones and pyrano[3,2-g]chromen-2,8-diones were prepared based on modified analogs of natural o-hydroxyformyl(acyl)neoflavonoids.
A versatile and efficient route to 4-substituted cournarins via a Pechmann reaction using ZrCl4 as the catalyst (10 mol %) is described. This method provides several advantages over alternative procedures such as mild, solvent-free conditions at ambient temperature, and direct isolation of the products in high yields. (c) 2005 Published by Elsevier Ltd.