benzyl (3S,6S,10aR)-6-(tert-butoxycarbonylamino)-5,8-dioxodecahydropyrrolo[1,2-a]azocine-3-carboxylate 、 benzyl (3S,6S,10aR)-6-(tert-butoxycarbonylamino)-5,9-dioxodecahydropyrrolo[1,2-a]azocine-3-carboxylate 在
硫酸 sodium cyanoborohydride 作用下,
以
甲醇 为溶剂,
以94%的产率得到benzyl (3S,6S,SR,10aR)-6-(tert-butoxycarbonylamino)-9-hydroxy-5-oxodecahydropyrrolo[1,2-a]azocine-3-carboxylate