METHOD OF PREPARING ENANTIOMERICALLY-PURE 3-METHYL-5-(1-ALKYL-2(S)-PYRROLIDINYL)ISOXAZOLES

摘要

A novel process for preparing enantiomerically -pure 3-methyl-5-(1-(C1-C3-alkyl)-2-pyrrolidyl)isoxazole in high yield, wherein a protected pyrrolidine or 2-oxo-pyrrolidine starting material is reacted with a suitable organic anion and a resulting beta-keto oxime intermediate is cyclized and dehydrated, as well as intermediates useful in the preparation thereof.