(2R,3R,4R,5S)-5-[(2S,3R)-3-Methoxy-1-(4-methoxy-phenyl)-4-oxo-azetidin-2-yl]-2-methyl-pyrrolidine-2,3,4-tricarboxylic acid trimethyl ester 在
盐酸 作用下,
以
异丙醇 为溶剂,
反应 36.0h,
以73%的产率得到(1R,2R,3R,6R,7S,7aS)-6-Methoxy-7-(4-methoxy-phenylamino)-3-methyl-5-oxo-hexahydro-pyrrolizine-1,2,3-tricarboxylic acid trimethyl ester