J. Chem. Soc., Perkin Trans. 1

Simple synthesis of allobetulin, 28-oxyallobetulin and related biomarkers from betulin and betulinic acid catalysed by solid acids

TS Li, JX Wang, XJ Zheng

文献索引：Li, Tong-Shuang; Wang, Jian-Xin; Zheng, Xue-Jing Journal of the Chemical Society - Perkin Transactions 1, 1998 , # 23 p. 3957 - 3965

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被引用次数: 55

摘要

Allobetulin (3a) and allobetulin acetate (3b) were efficiently prepared in excellent yield from betulin (2a) and betulin 3-acetate (2b) catalysed by a number of solid acids in refluxing dichloromethane. Sulfuric acid on silica, montmorillonite clays (both K10 and KSF), kaolinite, bleaching clay and toluene--sulfoni