(S)-2-[3-ethoxycarbonyl-2-(4-methoxy-phenoxy)-allylamino]-4-methyl-pentanoic acid methyl ester 在
ethyl acetate hexanes 作用下,
以
四氢呋喃 为溶剂,
反应 24.0h,
以afforded (S)-2-[4-(4-methoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid methyl ester (0.39 g, 46%) as a yellow oil的产率得到(S)-2-[4-(4-methoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid methyl ester