首次通过CF 3 SO 3 H促进的苄醇与1,3-二羰基的偶联/环化反应,以中等至高收率实现了茚满衍生物的高效便捷的一锅合成。对于甲氧基或甲基取代的二芳基甲醇与1,3-二羰基的反应,需要2当量的CF 3 SO 3 H才能达到最佳效果。但是对于甲氧基取代的芳基乙醇与1,3-二羰基的反应,在较低温度下0.6当量的CF 3 SO 3 H能够促进反应的完成。
A simple and efficient FeCl3-catalyzed direct alkylation of active methylene compounds with benzylic and allylic alcohols under mild conditions
作者:Umasish Jana、Srijit Biswas、Sukhendu Maiti
DOI:10.1016/j.tetlet.2007.04.017
日期:2007.6
A highlyefficient FeCl3-catalyzed alkylation of various active methylene compounds with various benzylic or allylic alcohols under mild conditions has been developed. The reaction was carried out in the presence of a catalytic amount of anhydrous FeCl3 (10 mol %) under reflux in methylene chloride. High to excellent yields were obtained.