1-O-tert-butyl 2-O-methyl (2R,3S)-3-[(3-formyl-6-methoxycarbonyl-4-phenylmethoxyindol-1-yl)methyl]aziridine-1,2-dicarboxylate 在
lithium hydroxide 作用下,
以96%的产率得到(2R,3S)-3-[(3-formyl-6-methoxycarbonyl-4-phenylmethoxyindol-1-yl)methyl]-1-[(2-methylpropan-2-yl)oxycarbonyl]aziridine-2-carboxylic acid