A Versatile Stereocontrolled Approach to Chiral Tetrahydrofuran and Tetrahydropyran Derivatives via Sequential Asymmetric Horner−Wadsworth−Emmons and Palladium-Catalyzed Ring Closure Reactions
作者:Lauri Vares、Tobias Rein
DOI:10.1021/ol006135r
日期:2000.8.1
[GRAPHICS]An approach to chiral tetrahydrofuran and tetrahydropyran derivatives Is reported which is based on the sequential use of an asymmetric Horner-Wadsworth-Emmons desymmetrization of a meso dialdehyde and a palladium-catalyzed intramolecular allylic substitution. The strategy is versatile in that either a cis- or a trans-relation between the stereocenters adjacent to the ring oxygen can be obtained.