17.alpha.-hyroxy- and 17a.alpha.-hydroxy-D-homoetiocarboxylic acids of the formula ##STR1## wherein n is 1 or 2, A is ##STR2## and R.sub.1 is H or CH.sub.3 are prepared by hydrating the corresponding 17-nitriles with a mixture of a lower carboxylic acid and its anhydride in the presence of perchloric acid. The resultant 17.beta.-N-acylcarboxamide is then treated with an alkali metal hydroxide in a polyhydric alcohol at an elevated temperature. The product acids are intermediates, e.g., for the production of steroids having antiinflammatory activity.
该公式表示的17.alpha.-羟基和17a.alpha.-羟基-D-同型
硫代
羧酸,其中n为1或2,A为,R.sub.1为H或CH.sub.3,通过在
高氯酸存在下用混合物
水合对应的17-腈进行制备。然后,将产生的17.beta.-N-酰基羧酰胺在多元醇中用碱
金属氢氧化物在高温下进行处理。这些产物酸是中间体,例如用于生产具有抗炎活性的类
固醇。