A Scaleable Combined Resolution and Improved Dosage Form for Etodolac with Recycle of the Off-Isomer
作者:Martin Woods、Ulrich C. Dyer、John F. Andrews、C. Neil Morfitt、Roy Valentine、Joanne Sanderson
DOI:10.1021/op000014p
日期:2000.9.1
An efficient resolution process using N-methyl glucamine (meglumine) which directly provides (S)-etodolac as the meglumine salt is described. This salt is also a dosage form with improved absorption characteristics. The off-isomer is efficiently racemised via the ester, prepared by mild esterification, followed by hydrolysis affording rac-etodolac suitable for recycling.