Preparation of polyhydroxyalkyl- and C-glycosylfuran derivatives from free sugars catalyzed by cerium(III) chloride in aqueous solution: an improvement of the Garcia González reaction
作者:Anup Kumar Misra、Geetanjali Agnihotri
DOI:10.1016/j.carres.2004.02.011
日期:2004.5
Unprotected aldose sugars react smoothly with 1,3-diones or beta-ketoesters in the presence of CeCl(3).7H(2)O in aqueous solution to produce polyhydroxylalkyl- and C-glycosylfuran derivatives in excellent yield. Operationally simple, mild neutral reaction conditions in aqueous solution is the key feature of this methodology.
An efficient method has been developed for the synthesis of Garcia Gonzalez polyhydroxyalkyl- and C-glycosylfurans in excellent yields from unprotected sugar aldoses with β-keto esters by Knoevenagel condensation in the presence of anhydrous iron(III) chloride. d-glucose - β-keto esters - Knoevenagel reaction - furans - carbohydrates