作者:Carla D. Nunes、Pedro D. Vaz、Vítor Félix、Luis F. Veiros、Tânia Moniz、Maria Rangel、Sara Realista、Ana C. Mourato、Maria José Calhorda
DOI:10.1039/c4dt03174a
日期:——
styrene epoxidation promoted by complex 3 with H2O2 (290 mol mol−1V h−1) and for cis-cyclooctene epoxidation by 2 with tbhp (248 mol mol−1V h−1) are particularly good. Conversions reached 90% for several systems with tbhp, and were lower with H2O2. A preference for the internal CC bond, rather than the terminal one, was found for limonene. Kinetic data indicate an associative process as the first step
三个新单核氧钒(IV)配合物[VO(ACAC)(R-卞)] Cl(上边= 1,2-双(R -苯基)亚氨基}苊,R = H,1 ; CH 3,2 ;氯,3)的制备和表征。他们促进了tbhp(叔丁基氢过氧化物)和H 2 O 2的烯烃,如环己烯,顺式-环辛烯和苯乙烯的催化氧化,以及对映纯烯烃(S(-)-和R(+)- pine烯)的催化氧化。S(-)-和R(+)-柠檬烯)选择性地氧化成其环氧化物,并以tbhp作为氧化剂。由配合物3与H 2 O 2(290 mol mol -1 V h -1)促进的苯乙烯环氧化的TOF和与tbhp(248 mol mol -1 V h -1)的2对顺式环辛烯环氧化的TOF特别好。几个tbhp的系统的转化率达到90%,而使用H 2 O 2的转化率则更低。对内部C的偏好发现柠檬烯是C键而不是末端的C键。动力学数据表明,缔合过程是反应的第一步,将tbhp加入1后,在FT