Two processes are disclosed (one-pot and two-pot) for the transformation of a 6.beta.-fluoro-.DELTA..sup.1,4 -3-keto steroid (IV) to a 6.alpha.-fluoro-.DELTA..sup.1,4 -3-keto steroid (VI). These processes permit the introduction of a fluorine atom at the 6.alpha. position of a .DELTA..sup.1,4 -3-keto steroid where previously the .DELTA..sup.1 double bond could not be introduced until after the 6.alpha.-fluorine atom was present. The 6.alpha.-fluoro-.DELTA..sup.1,4 -3-keto steroids (VI) are intermediates useful in the production of pharmacologically active steroids.
本文介绍了一种转化6.beTA.-fluoro-.DELTA..sup.1,4 -3-keto类
固醇(IV)为6.alpha.-fluoro-.DELTA..sup.1,4 -3-keto类
固醇(VI)的两种方法(一锅法和两锅法)。这些方法允许在以前无法在6.alpha.位置引入双键的.DELTA..sup.1,4 -3-keto类
固醇中引入
氟原子,直到6.alpha.-fluorine原子出现之后。6.alpha.-fluoro-.DELTA..sup.1,4 -3-keto类
固醇(VI)是制造药理活性类
固醇的有用中间体。