Described is a new process for preparing 3-oxo-4-aza-androst-1-ene 17β-ketones. The process involves converting the corresponding 17β-alkyl carboxylate to the N-methoxy-N-methyl carboxamide and reacting this with an appropriate Grignard reagent to form the desired ketone. The reaction can be conducted in "one pot", thus eliminating isolation of intermediates and avoiding the use of less stable intermediates, e.g., acid chlorides, acyl imidazolides and the like.
描述了一种制备 3-氧代-4-氮杂雄甾-1-烯 17β 酮的新工艺。该工艺包括将相应的 17β- 烷基
羧酸酯转化为 N-甲氧基-N-甲基羧酰胺,并与适当的
格氏试剂反应生成所需的酮。反应可在 "一锅 "中进行,从而避免了中间产物的分离,也避免了使用稳定性较差的中间产物,如酸
氯化物、酰基
咪唑化物等。