(RS)-4-[3-(Carboxy-methoxy-methyl)-5-ethoxy-2-fluoro-phenoxy]-piperidine-1-carboxylic acid tert-butyl ester 、
对氰基苄胺 以to give (RS)-4-{3-[(4-cyano-benzylcarbamoyl)-methoxy-methyl]-5-ethoxy-2-fluoro-phenoxy}-piperidine-1-carboxylic acid tert-butyl ester according to general procedure B的产率得到(RS)-4-{3-[(4-cyano-benzylcarbamoyl)-methoxy-methyl]-5-ethoxy-2-fluoro-phenoxy}-piperidin-1-carboxylic acid tert-butyl ester