Directed oxidative cyclization of 5-hydroxyalkenes with rhenium oxide
摘要:
5-Hydroxyalkenes react with rhenium(VII) oxide (Re2O7) to provide 2-hydroxymethyltetrahydrofurans. Oxidative cyclization occurs with overall syn addition to the alkenes in moderate yields with little tendency toward oxidation of alcohols to carbonyl compounds.
Oxidative cyclization of 5-hydroxyalkenes with rhenium oxide, utilizing a co-oxidant. IV
作者:Suhan Tang、Robert M. Kennedy
DOI:10.1016/s0040-4039(00)79078-2
日期:1992.9
5-Hydroxylalkenes react with rhenium(VII) oxide in the presence of another oxidant, H5IO6, to provide substituted tetrahydrofurans. The yield and stereoselectivity are comparable to stoichiometric results.
Enantioselective Bromocyclization of Olefins Catalyzed by Chiral Phosphoric Acid
作者:Deshun Huang、Haining Wang、Fazhen Xue、Huan Guan、Lijun Li、Xianyou Peng、Yian Shi
DOI:10.1021/ol202527g
日期:2011.12.16
A chiral phosphoric acid catalyzed enantioselective bromocyclization of olefins is described. Various cis-, trans-, or trisubstituted γ-hydroxy-alkenes and γ-amino-alkenes can cyclize under the reaction conditions to give optically active 2-substituted tetrahydrofurans and tetrahydropyrroles in up to 91% ee.
Directed oxidative cyclization of 5-hydroxyalkenes with rhenium oxide
作者:Robert M. Kennedy、Suhan Tang
DOI:10.1016/0040-4039(92)80010-h
日期:1992.6
5-Hydroxyalkenes react with rhenium(VII) oxide (Re2O7) to provide 2-hydroxymethyltetrahydrofurans. Oxidative cyclization occurs with overall syn addition to the alkenes in moderate yields with little tendency toward oxidation of alcohols to carbonyl compounds.