3-(5-{[tert-butoxycarbonyl-(4-cyano-phenyl)-amino]-methyl}-3-hydroxy-2-methyl-pyridin-4-yl)-propionic acid methyl ester 、
3-氰基苄基溴 以gave 3-[5-{[tert-butoxycarbonyl-(4-cyano-phenyl)-amino]-methyl}-3-(3-cyano-benzyloxy)-2-methyl-pyridin-4-yl]-propionic acid methyl ester (122) (162 mg, 68% yield for 2 steps)的产率得到3-[5-{[tert-butoxycarbonyl-(4-cyano-phenyl)-amino]-methyl}-3-(3-cyano-benzyloxy)-2-methyl-pyridin-4-yl]-propionic acid methyl ester