Process for enhancing the optical purity of 2r-{1-hydroxy- 1-trifluoromethyl- 3-cyclopropylpropyn-2yl} -4-chloroaniline

摘要

A process for enhancing the purity of 2R-[1-hydroxy- 1-trifluoromethyl- 3-cyclopropylpropyn-2-yl] -4-chloroaniline comprising the formation of an acid addition salt which is capable of rejecting the racemate in the selected organic solvent.