Sensitive nature of ligand coupling and pseudorotation to electronic effect of substituent---ligand coupling in the reactions of benzylic aryl sulfoxides with benzylic Grignard reagents
作者:Shoji Wakabayashi、Masahiro Ishida、Takashi Takeda、Shigeru Oae
DOI:10.1016/s0040-4039(00)80517-1
日期:1988.1
Unlike the reaction of benzylic 2-pyridyl sulfoxides with benzylic Grignard reagents, in the reaction of p-benzenesulfonylphenyl benzylic sulfoxides with benzylic Grignard reagents, benzylic groups bearing an electron-withdrawing group tends to couple with the aryl group preferentially. This change is considered to be due to a slight change of electronic environements which would effect on the ease
与苄基2-吡啶基亚砜与苄基格利雅试剂的反应不同,在对苯磺酰基苯基苄基亚砜与苄基格利雅试剂的反应中,带有吸电子基团的苄基倾向于优先与芳基偶联。该变化被认为是由于电子环境的轻微变化,这将影响反应过程中形成的初始σ-硫烷的假旋转的容易程度。