Synthesis of N-Heteroaryl(trifluoromethyl)hydroxyalkanoic Acid Esters by Highly Efficient Solid Acid-Catalyzed Hydroxyalkylation of Indoles and Pyrroles with Activated Trifluoromethyl Ketones
作者:Mohammed Abid、Béla Török
DOI:10.1002/adsc.200505117
日期:2005.11
The synthesis of N-heteroaryl(trifluoromethyl)hydroxyalkanoicacidesters by solidacid-catalyzed Friedel–Crafts hydroxyalkylation of indoles and pyrroles with ethyl 3,3,3-trifluoropyruvate and ethyl 4,4,4-trifluoroacetoacetate is described. The inexpensive and readily available K-10 montmorillonite is found to be an efficient catalyst for the synthesis of a wide variety of trifluoromethylated indol-3-yl-