3-(4-{3-[3-methoxy-4-(3-o-tolyl-ureido)-phenyl]-2-oxo-2H-pyridin-1-ylmethyl}-phenyl)-butyric acid methyl ester 在
lithium hydroxide 作用下,
以
四氢呋喃 为溶剂,
以89%的产率得到(3R)-3-(4-{[3-(3-methoxy-4-{[(2-methylphenyl)carbamoyl]amino}phenyl)-2-oxo-1,2-dihydropyridin-1-yl]methyl}phenyl)butanoic acid