methyl 2-benzyl-5-<(N-benzyloxycarbonyl)-L-phenylalanyl>amino-2-methoxycarbonyl-4-oxopentanoate 在
palladium on activated charcoal
氢气 、 sodium cyanoborohydride 、 zinc(II) chloride 作用下,
生成
(4S,7R,8aR)-4,7-dibenzyl-7-methoxycarbonyl-3,6-dioxoperhydropyrrolo<1,2-a>pyrazine 、
4,7-dibenzyl-7-methoxycarbonyl-3,6-dioxoperhydropyrrolo<1,2-a>pyrazine 、 4,7-dibenzyl-7-methoxycarbonyl-3,6-dioxoperhydropyrrolo<1,2-a>pyrazine 、 4,7-dibenzyl-7-methoxycarbonyl-3,6-dioxoperhydropyrrolo<1,2-a>pyrazine