A method for preparing analogues of C1,C24-dihydroxy-vitamin D is disclosed. Especially the method for preparing calcipotriol and tacalcitol from a starting material of Vitamin D2 is disclosed here. Calcipotriol (compound 1(a)) and tacalcitol (compound 1(b)) can be synthesized by the method of the present invention. Moreover, only nine steps are needed for the synthesis of calcipotriol using the method. Likewise, only ten steps are needed for the synthesis of tacalcitol by the present method. Hence, the present method, with less process steps and higher yields, represents an improvement over the conventional methods.
揭示了一种制备C1,C24-二羟基
维生素D类似物的方法。特别是在这里揭示了从
维生素D2起始物质制备
钙醇和他卡尔西醇的方法。
钙醇(化合物1(a))和他卡尔西醇(化合物1(b))可以通过本发明的方法合成。此外,使用该方法合成
钙醇只需要九个步骤。同样,使用本方法合成他卡尔西醇只需要十个步骤。因此,本方法具有更少的工艺步骤和更高的产量,相对于传统方法而言,代表了一种改进。