反应详情

The title compound was prepared from (E)-(S)-ethyl 2-ethoxy-3-{4-[3-(5′-isopropyl-2′-methoxy-biphenyl-4-yl)-but-2-enyloxy]-phenyl}-propionate (example 54) (0.50 g, 0.968 mmol) and sodium hydroxide (1M, 1.93 ml, 1.93 mmol) by a procedure analogous to that described in example 51, yielding (E)-(S)-2-ethoxy-3-{4-[3-(5′-isopropyl-2′-methoxy-biphenyl-4-yl)-but-2-enyloxy]-phenyl}-propionic acid as a colourless gum, which contained 0.44 mol equivalents of ethyl acetate; 0.48 g (94%).