(R)-6-<(R)-<2-<3,4-bis(benzyloxy)phenyl>-2-hydroxyethyl>amino>heptanoic acid 在
5% Pd on active carbon
氢气 、
三乙胺 、
氯甲酸异丁酯 作用下,
以
甲醇 为溶剂,
反应 21.5h,
生成 tert-butyl N-<(S)<<4-<(R)-6-<(R)-<2-(3,4-dyhydroxyphenyl)-2-hydroxyethyl>amino>heptanamido>-phenyl>methyl><<(N-methylcarbamoyl)methyl>carbamoyl>methyl>carbamate (1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo<2.2.1>heptane-1-carboxylate camphanic acid salt