benzyl (4R)-4-[(E)-5-ethoxy-4-[(2-methylpropan-2-yl)oxycarbonylamino]-3,5-dioxopent-1-enyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate 在
palladium on activated charcoal
盐酸 、
氢气 作用下,
以
乙醇 为溶剂,
生成 tert-Butoxycarbonylamino-[(S)-5-hydroxymethyl-pyrrolidin-(2E)-ylidene]-acetic acid ethyl ester 、
tert-Butoxycarbonylamino-[(R)-5-hydroxymethyl-pyrrolidin-(2E)-ylidene]-acetic acid ethyl ester 、 tert-Butoxycarbonylamino-[(S)-5-hydroxymethyl-pyrrolidin-(2Z)-ylidene]-acetic acid ethyl ester 、 ethyl (R)-2-(tert-butoxycarbonylamino)-2-(5-hydroxymethylpyrrolidin-2-ylidene)acetate