title: Acetylenic bond participation in biogenetic-like olefinic cyclizations in nitroalkane solvents. Synthesis of the 17-hydroxy-5 beta-pregnan-20-one system.
mesh_terms: D000085:Acetates; D000473:Alkanes; D003500:Cyclization; D004988:Ethers, Cyclic / Q000138:chemical synthesis; D006914:Hydroxysteroids / Q000138:chemical synthesis; D008722:Methods; D009574:Nitro Compounds; D010091:Oximes / Q000138:chemical synthesis; D011278:Pregnanes / Q000138:chemical synthesis*; D012997:Solvents
chemical_list: D000085:Acetates; D000473:Alkanes; D004988:Ethers, Cyclic; D006914:Hydroxysteroids; D009574:Nitro Compounds; D010091:Oximes; D011278:Pregnanes; D012997:Solvents