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