1,1-dimethylethyl (3S)-3-{[(2-aminophenyl)amino]methyl}-1-piperidinecarboxylate 、
1,1-dimethylethyl (3R)-3-{[2-(chloromethyl)-1H-benzimidazol-1-yl]-methyl}-1-piperidinecarboxylate 以afforded 2.37 g (85%) of 1,1-dimethylethyl (3S)-3-{[2-(chloromethyl)-1H-benzimidazol-1-yl]methyl}-1-piperidinecarboxylate as a light pinkish-brown foam的产率得到1,1-dimethylethyl (3S)-3-{[2-(chloromethyl)-1H-benzimidazol-1-yl]methyl}-1-piperidinecarboxylate