(3aR,6R,6aS)-6-(1-Ethoxy-ethoxymethyl)-4-hydroxy-2-methyl-hexahydro-pyrrolo[3,4-d]isoxazole-5-carboxylic acid tert-butyl ester 在
吡啶 、 sodium cyanoborohydride 、
溶剂黄146 作用下,
反应 6.3h,
生成
(4R,7R,8S)-7-acetoxymethyl-6-tert-butoxycarbonyl-2-methyl-1-oxa-2,6-diazabicyclo[3.3.0]octane