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以来源丰富的猪去氧胆酸甲酯(Ⅳ)为原料,经选择性氧化得C_6—酮(V),产率64％.将C_6—酮与水合肼反应成腙后加入18—冠—6和KOH分解腙,制得了胆石酸(Ⅶ),产率70％.
(Ⅳ) as raw material, and the yield was 64% by selective oxidation of C_6-ketone (V) .The reaction of C_6-ketone and hydrazine hydrate to hydrazone was followed by the addition of 18-crown-6 And KOH decomposed hydrazone, the tartaric acid (Ⅶ) was obtained in 70% yield.