methyl 4-phenyl-D-phenylglycinate 、
2,5-{[(tert-butoxy)carbonyl]imino}-2,5-dideoxy-3,4-O-isopropylidene-L-ribose 在
三乙酰氧基硼氢化钠 作用下,
以
1,2-二氯乙烷 为溶剂,
以49%的产率得到tert-butyl(3aR,4R,6aS)-4-{{[(1R)-1-biphenyl-4-yl-2-methoxy-2-oxoethyl]amino}methyl}-2,2-dimethyltetrahydro-5H-[1,3]dioxolo[4,5-c]pyrrole-5-carboxylate