Practical enantioselective synthesis of a COX-2 specific inhibitor
作者:Lushi Tan、Cheng-yi Chen、Weirong Chen、Lisa Frey、Anthony O King、Richard D Tillyer、Feng Xu、Dalian Zhao、Edward J.J Grabowski、Paul J Reider、Paul O'Shea、Philippe Dagneau、Xin Wang
DOI:10.1016/s0040-4020(02)00826-8
日期:2002.9
synthetic strategies to the COX-2 specific inhibitor 1 have been described that allowed its preparation in large quantities in 79% overall yield from (S)-2-hydroxy-2-methylbutyric acid. These studies have led to the identification of an efficient resolution of (±)-2-hydroxy-2-methylbutyric acid and a novel thionyl chloride aided formation of amide 11 from acid 6.