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US5559242A Method of preparing enantiomerically-pure 3-methyl-5-(1-alkyl-2(S)-pyrrolidinyl) isoxazoles 失效
制备对映体纯的3-甲基-5-(1-烷基-2(S) - 吡咯烷基)异恶唑的方法

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-(C.sub.1 -C.sub.3 -alkyl)-2-pyrrolidinyl)isoxazole in high yield, wherein a protected 2-oxo-pyrrolidine starting material is reacted with a suitable organic anion and a resulting beta-keto oxime intermediate is cyclized and dehydrated.
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