Stereochimie de quelques reactions entre aldehydes et reactifs de Grignard satures et allyliques
作者:H. Felkin、Y. Gault、G. Roussi
DOI:10.1016/s0040-4020(01)92953-9
日期:1970.1
γ-dimethylallyl magnesium bromides) and secondary alkyl [s-butyl magnesium bromide and (1,2-dimethylpropyl) magnesium chloride] Grignard reagents to form pairs of diastereoisomeric alcohols R′—CHMeCHOH—R (R′ = CH2CH, CH2CMe, Et and iPr, respectively). The reactions involving the secondary alkyl Grignard reagents are not stereoselective; those involving the allylic Grignard reagents show some stereoselectivity
醛R-CHO(R = Me,Et,iPr,tBu)与烯丙基(巴豆基和β,γ-二甲基烯丙基溴化镁)和仲烷基[仲丁基溴化镁和(1,2-二甲基丙基)氯化镁]反应试剂以形成非对映异构的醇对R'-CHMeCHOH-R(R'= CH 2 = CH 3,CH 2 = CMe E,Et和iPr)。涉及二级烷基格氏试剂的反应不是立体选择性的;反之亦然。那些涉及烯丙基格利雅试剂的试剂显示出一定的立体选择性,其方向和大小取决于试剂和醛的结构。