Asymmetric Allylic Alkylation in Combination with Ring-Closing Metathesis for the Preparation of Chiral N-Heterocycles
作者:Johannes F. Teichert、Suyan Zhang、Anthoni W. van Zijl、Jan Willem Slaa、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1021/ol101944j
日期:2010.10.15
Asymmetric copper-catalyzed allylic substitution with methylmagnesium bromide is employed in combination with ring-closing olefin metathesis or ene−yne metathesis to achieve the synthesis of chiral, unsaturated nitrogen heterocycles. The resulting six- to eight-membered chiral heterocycles are accessible in high yields and with excellent enantioselectivities.