methyl (E)-3-pyrrolidin-1-ylpent-2-enoate 、
2-(tert-Butyl-dimethyl-silanyloxy)-thiopropionic acid S-pyridin-2-yl ester 在
三乙基硼氢化锂 、
lithium diisopropyl amide 作用下,
生成 (5R,6R)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-5-methyl-4-pyrrolidin-1-yl-5,6-dihydro-pyran-2-one 、 (5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-5-methyl-4-pyrrolidin-1-yl-5,6-dihydro-pyran-2-one