Patent ID: 7626024

Claim:
A compound of the Formula IIa-2d having an enantiomeric purity higher than 95% enantiomeric excess, wherein R 1 is an alkyl, an alkenyl, an alkynyl, an aryl, or an aralkyl, each of which is unsubstituted or substituted with one or more substituents selected from the group consisting of halogen, alkyl, aryl, alkoxyl, aryloxy, thioalkoxyl, thioaryloxy, alkylamino, arylamino, cyano, pyridinyl, thiophenyl, furanyl, imidazolyl, morpholinyl, oxazolinyl, piperidinyl, piperazinyl, tetrahydropyranyl, pyrrolidinyl, and pyrrolidinonyl; Y is methylene or oxygen; and X is H, Cl or CF 3 .