C2-Symmetric Chiral Disulfoxide Ligands in Rhodium-Catalyzed 1,4-Addition: From Ligand Synthesis to the Enantioselection Pathway
作者:Ronaldo Mariz、Albert Poater、Michele Gatti、Emma Drinkel、Justus J. Bürgi、Xinjun Luan、Sascha Blumentritt、Anthony Linden、Luigi Cavallo、Reto Dorta
DOI:10.1002/chem.201001749
日期:2010.12.27
Their synthesis, optical purity, electronic properties, and catalytic behavior in the prototypical rhodium‐catalyzed 1,4‐addition of phenylboronic acid to 2‐cyclohexen‐1‐one are presented through an in depth study of this ligand class. Density functional theory calculations on the step of the catalytic cycle that determines the enantioselectivity are presented and reinforce the first hypothetical explanations
通过使用Andersen方法合成了具有联芳基阻转异构体骨架的手性C 2对称二亚砜配体家族。完整的表征包括对所有配体及其某些铑配合物的X射线晶体学研究。通过对该配体类别的深入研究,介绍了它们的合成,光学纯度,电子性质以及在典型的铑催化的苯基硼酸向2-环己烯-1-酮的1,4加成中的催化行为。提出了确定对映选择性的催化循环步骤的密度泛函理论计算,并加强了观察到的高水平不对称诱导的第一个假设解释。