(17R)-Spiro-[androstane-17,1'-cyclobutan]-2'-ones are prepared by the reaction of a 17-oxo androstane, wherein all other ketones are blocked, with a cyclopropylarylsulfide or with a cyclopropylarylsulfonium salt having a non-nucleophilic anion, in an organic solvent together with a strong base, followed by reaction in situ of the intermediate thereby formed with aqueous acid or water. Some (17R)-spiro-[androstan-17,1'-cyclobutan]-2'-ones are useful as intermediates in preparing (17R)-spiro-[3-oxo-4-androstene-17,1'-cyclobutan]-2'-ones which are aldosterone antagonists. Additionally, (17R)-spiro-[androstane-17,1'-cyclobutan]-2'-ones are useful as intermediates in preparing known 17.alpha.-pregnane-21,17.beta.-carbolactones, valuable aldosterone blocking agents.
(17R)-spiro-[
雄甾烷-17,1'-
环丁基]-2'-酮是通过将17-酮
雄甾烷(其中所有其他酮被阻断)与环丙基芳基
硫醚或具有非亲核阴离子的环丙基芳基
硫鎓盐在有机溶剂中与强碱反应,随后与
水溶酸或
水原位反应而制备的。一些(17R)-spiro-[
雄甾烷-17,1'-
环丁基]-2'-酮可用作制备(17R)-spiro-[3-氧代-4-雄烷烯-17,1'-
环丁基]-2'-酮的中间体,后者是
醛固酮拮抗剂。此外,(17R)-spiro-[
雄甾烷-17,1'-
环丁基]-2'-酮可用作制备已知的17α-孕烷-21,17β-羧内酯,这是有价值的
醛固酮阻滞剂的中间体。