title: Catalytic cycloalumination in steroid chemistry: the introduction of a spirotetrahydrofuran or spirotetrahydroselenophene moiety into a 3'-methylene-(5α)-spirocholestane-3,1'-cyclobutane molecule.
abstract: Cycloalumination of 3'-methylene-(5α)-spirocholestane-3,1'-cyclobutane with triethylaluminum catalyzed by Cp(2)ZrCl(2) was accomplished for the first time to give (5α)-spirocholestane-3,1'-(6'-ethyl-6'-aluminaspiro [3.4] octane) in 89%. The latter, without isolation, was converted into spirotetrahydroselenophene or spirotetrahydrofuran.
authors.affiliation: Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Ufa, Russian Federation. DyakonovVA@rambler.ru
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: D'yakonov
authors.forename: Regina A
authors.initials: RA
authors.lastname: Tuktarova
authors.forename: Ilgiz I
authors.initials: II
authors.lastname: Islamov
authors.forename: Leonard M
authors.initials: LM
authors.lastname: Khalilov
authors.forename: Usein M
authors.initials: UM
authors.lastname: Dzhemilev
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D002776:Cholestanes / Q000138:chemical synthesis / Q000737:chemistry*; D005663:Furans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D016566:Organoselenium Compounds / Q000737:chemistry*; D013141:Spiro Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry*
chemical_list: D002776:Cholestanes; D005663:Furans; D016566:Organoselenium Compounds; D013141:Spiro Compounds; D013256:Steroids; D000537:Aluminum Oxide