ZrOCl 2. 8H 2 O/SiO 2: An efficient and recyclable catalyst for the preparation of coumarin derivatives by Pechmann condensation reaction

B Karami, M Kiani

Index: Karami, Bahador; Kiani, Mahtab Catalysis Communications, 2011 , vol. 14, # 1 p. 62 - 67

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Citation Number: 49

Abstract

Silica gel supported zirconyl chloride octahydrate was found to be an efficient and recyclable catalyst for the synthesis of a series of biologically important molecules in high turnover numbers and rates. Several substituted coumarins can be prepared in high yield and purity by direct reaction of β-keto esters and phenol derivatives in the presence of a catalytic amount of ZrOCl2. 8H2O/SiO2 as Lewis acid and at ambient temperature under ...