Asymmetric Intramolecular Oxa-Michael Reactions to Tetrahydrofurans/2<i>H</i>-Pyrans Catalyzed by Primary–Secondary Diamines
作者:Yingpeng Lu、Gang Zou、Gang Zhao
DOI:10.1021/cs4002332
日期:2013.6.7
The asymmetric intramolecular oxa-Michael reactions of α,β-unsaturated ketones have been achieved by using readily accessible primary–secondary diamines as the organocatalysts, giving the synthetically useful tetrahydrofurans/2H-pyrans in good yields and with high enantioselectivities (up to 90% ee).
α,β-不饱和酮的不对称分子内oxa-Michael反应已通过使用易于获得的伯-仲二胺作为有机催化剂而实现,从而以高收率和高对映选择性(高达90的合成产率)提供了合成上有用的四氢呋喃/ 2 H-吡喃。 %ee)。