Analysis of the enantioselectivities and initial rates of the hydrosilylation of acetophenone catalyzed by [Rh(cod)Cl]2/(chiral diphosphine). The quantitative analysis of ligand effects
作者:Clementina Reyes、Alfred Prock、Warren P. Giering
DOI:10.1016/s0022-328x(02)02221-0
日期:2003.4
Through the application of the quantitative analysis of ligand effects (QALE) method to the study of the hydrosilylation of acetophenone, we have shown, for the first time, that the initial rate and enantioselectivity of a complicated catalytic system responds in a rational manner to the variations in the stereoelectronic properties of the silane. The reactions (in benzene-d6 at 63 °C) were catalyzed
通过将配体效应定量分析(QALE)方法用于对苯乙酮的氢化硅烷化研究,我们首次表明,复杂催化体系的初始速率和对映选择性以合理的方式响应于苯乙酮。硅烷的立体电子性质的变化。该反应(在63°C的苯-d 6中)通过[Rh(cod)Cl] 2 /(手性二膦)(手性二膦=(R)-BINAP [(R)-(+)-2.2'-双(二苯基膦基)-1,1'-联萘基],(R,R)-甲苯基-BINAP [(R)-(+)-2,2'-双(二-对甲苯基膦基)-1,1'-联萘基],(R,R)-Me-DUPHOS [(R,R)-(-)-1,2-Bis-2,5-二甲基膦酰基苯),(R,R)-DIOP [(R,R)-(-) -2,3- ø -isopropylidine -2,3-二羟基-1,4-双(二苯基膦基)丁烷],和(- [R)-QUINAP [([R )- (+) - 1-(2-二苯基膦基-1-萘基)。氢化硅烷化产物(CH