Cyclodextrin Ketones with the Catalytic Group at the Secondary Rim and Their Effectiveness in Enzyme-Like Epoxidation of Stilbenes
作者:Thomas Hauch Fenger、Lavinia G. Marinescu、Mikael Bols
DOI:10.1002/ejoc.201001696
日期:2011.4
Several new cyclodextrin ketones with a ketone attached to the secondary face of the cyclodextrin in the form of a 2,3-O-(2-oxopropane-1,3-diyl) or 2-oxo group are reported. These compounds and a selection of known cyclodextrin ketones having the ketone at the primary face were investigated as epoxidation catalysts for oxidation of stilbenes and styrene. A method for determination of k cat in these
报道了几种新的环糊精酮,其中酮以 2,3-O-(2-氧代丙烷-1,3-二基) 或 2-氧代基团的形式连接到环糊精的二级面上。这些化合物和精选的在主面具有酮的已知环糊精酮被研究作为二苯乙烯和苯乙烯氧化的环氧化催化剂。提出了一种确定这些环氧化中 k cat 的方法,该方法用于确定环糊精酮相对于背景反应的速率加速度。4-甲氧基-4'-硝基-反式-二苯乙烯环氧化获得的最高加速速率为221。获得的最高对映选择性为76%ee的(S)-氧化苯乙烯。