Bicyclo[3.2.1]octanone catalysts for asymmetric alkene epoxidation: the effect of disubstitution
作者:Alan Armstrong、Belen Dominguez-Fernandez、Tomoki Tsuchiya
DOI:10.1016/j.tet.2005.12.073
日期:2006.7
A series of 2-fluoro-8-oxabicyclo[3.2.1]octan-3-ones are prepared and tested as catalysts for alkene epoxidation with Oxone®. These catalysts provide trans-stilbene oxide with up to 83% ee, but the highest ee value is obtained with the monofluorinated ketone 2: both 2,2- and 2,4-disubstituted catalysts afford epoxide of lower ee.
一系列2-氟-8-氧杂双环[3.2.1]辛-3-酮制备并与过硫酸氢钾的催化剂的烯烃环氧化的测试®。这些催化剂可提供高达83%ee的反式-氧化二苯乙烯,但单氟化酮2可获得最高ee值:2,2-和2,4-二取代的催化剂均可提供较低ee的环氧化物。