Opening of Substituted Oxetanes with H<sub>2</sub>O<sub>2</sub> and Alkyl Hydroperoxides: Stereoselective Approach to 3-Peroxyalcohols and 1,2,4-Trioxepanes
作者:Patrick H. Dussault、Tony K. Trullinger、Farhana Noor-e-Ain
DOI:10.1021/ol0265259
日期:2002.12.1
of oxetanes by hydrogen peroxide proceeds regioselectively and with good to moderate stereoselectivity to furnish enantiomericallyenriched 3-hydroperoxyalkanols. The corresponding opening using alkyl hydroperoxides furnishes 3-peroxyalkanols. The hydroperoxyalkanols are easily converted into enantiomericallyenriched 1,2,4-trioxepanes, building blocks for antimalarials.
Intramolecular Reactions of Hydroperoxides and Oxetanes: Stereoselective Synthesis of 1,2-Dioxolanes and 1,2-Dioxanes
作者:Peng Dai、Patrick H. Dussault
DOI:10.1021/ol051407h
日期:2005.9.1
[reactions: see text] The 5-exo openings of oxetanes by hydroperoxides proceed rapidly and stereospecifically to furnish 1,2-dioxolanes. The corresponding 6-exo cyclizations are slower and proceed with moderate stereoselectivity. In the case of hydroperoxy acetals, 5-exo nucleophilic transfer of alkoxide competes effectively with 6-exo attack by the hydroperoxide.