Preparation process of deoxycholic acid key intermediate

The invention provides a preparation process of a deoxycholic acid key intermediate. Compared with the prior art, the preparation process provided by the invention has the advantages of higher reaction selectivity, high conversion rate, high yield, simplicity and convenience in post-treatment operation, fewer impurities, high product purity, lower industrial cost and better large-scale application prospect. 本发明提供一种脱氧胆酸关键中间体的制备工艺。与现有技术相比，本发明提供的制备工艺有较高的反应选择性，转化率高，收率高，后处理操作简便，杂质较少，产品纯度高，工业化成本较低，具有较好的规模化应用前景。