反应详情

The title compound was prepared from (E)-(S)-ethyl 2-ethoxy-3-{4-[3-(5′-chloro-2′-methoxy-biphenyl-4-yl)-but-2-enyloxy]-phenyl}-propionate (example 56) (0.47 g, 0.92 mmol) and sodium hydroxide (1M, 1.8 ml, 1.8 mmol) by a procedure analogous to that described in example 51, yielding (E)-(S)-3-{4-[3-(5′-chloro-2′-methoxy-biphenyl-4-yl)-but-2-enyloxy]-phenyl}-2-ethoxy-propionic acid as a colourless gum, which contained 0.2 mol equivalents of ethyl acetate; 0.43 g (98%).