(4S,1'S,2'S,3'R)-3-[N-(tert-butoxycarbonyl)]-2,2-dimethyl-4-[2'-(methoxycarbonyl)-3'-methylcyclopropyl]-1,3-oxazolidine 在
camphor-10-sulfonic acid 作用下,
以
甲醇 为溶剂,
以91%的产率得到methyl (1S,2S,3R,1'S)-2-[1'-[N-(tert-butoxycarbonyl)amino]-2'-hydroxyethyl]-3-methyl-1-cyclopropanecarboxylate