Collect. Czech. Chem. Commun. 2011, 76, 1791-1797
Published online 2012-01-19 10:31:48

FeCl3–SiO2 as heterogeneous catalysts for the preparation of dihydropyrano[3,2-b]chromenediones

Wei-Lin Lia,*, Jin-Ying Lianga, Tian-Bao Wangb and Ya-Qin Yangb

a School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
b The First Affiliated Hospital, Xinxiang Medical University, Henan 453003, P. R. China


FeCl3–SiO2 is environment-friendly heterogeneous catalyst for the condensation of kojic acid and aldehydes with dimedone to afford dihydropyrano[3,2-b]chromenediones. The solid acid catalyst is stable and can be easily recovered and reused without appreciable change in its efficiency.

Keywords: Dihydropyrano[3,2-b]chromenediones; Kojic acid; FeCl3–SiO2; Aldehydes; Heterogeneous catalysis; Synthetic methods.

References: 20 live references.