Synthesis of pure enantiomers of cis- and trans-3-(trifluoromethyl) pyroglutamic esters
作者:Detlef Gestmann、André J. Laurent、Eliane G. Laurent
DOI:10.1016/s0022-1139(96)03455-0
日期:1996.9
hydrolysis gives the cis/trans-3-(trifluoromethyl) pyroglutamates. The enantiomericallypure Schiff base, prepared from chiral 2-hydroxy-3-pinanone and t-butyl glycinate, reacts with trans-ethyl-4,4,4-trifluorocrotonate to produce four diastereoisomers which may be separated and hydrolysed to give enantiomericallypurecis- and trans-3-(trifluoromethyl)pyroglutamate.