异丙醇 、
(2S,3S,4S,5R)-5-[(2S,3R)-3-Methoxy-1-(4-methoxy-phenyl)-4-oxo-azetidin-2-yl]-pyrrolidine-2,3,4-tricarboxylic acid trimethyl ester 在
盐酸 作用下,
反应 36.0h,
以57%的产率得到(2aS,3S,4S,6R,6aS,6bR)-6-Methoxy-1-(4-methoxy-phenyl)-2,5-dioxo-octahydro-1,4a-diaza-cyclopenta[cd]pentalene-3,4-dicarboxylic acid 4-isopropyl ester 3-methyl ester