title: Reactions of alpha-ketols and other 21-hydroxy steroids with phosgene. IV. Formation of 20-chloro-17,20-cyclic carbonates from 17 alpha-hydroxy-20-ones.
mesh_terms: D002254:Carbonates / Q000138:chemical synthesis; D055598:Chemical Phenomena; D002621:Chemistry; D006914:Hydroxysteroids; D007664:Ketosteroids; D010705:Phosgene; D013258:Steroids, Chlorinated / Q000138:chemical synthesis
chemical_list: D002254:Carbonates; D006914:Hydroxysteroids; D007664:Ketosteroids; D013258:Steroids, Chlorinated; D010705:Phosgene