Stereoselective Addition of Grignard Reagents to New P-Chirogenic N-Phosphinoylbenzaldimines: Effect of the Phosphorus Substituents on the Stereoselectivity
作者:Irene Notar Francesco、Coraline Egloff、Alain Wagner、Françoise Colobert
DOI:10.1002/ejoc.201100380
日期:2011.7
give both diastereoisomers in high yields and with promising diastereomeric ratios. Then N-[(tert-butyl)(phenyl)phosphinoyl]benzaldimine, which displayed the best results, was subjected to the 1,2-addition of various Grignard reagents to evaluate the best chiral induction due to the stereogenic phosphorus atom. The corresponding adducts were obtained in excellent yields and with moderate to excellent diastereoisomeric
通过从合适的氧化膦开始,通过五个步骤合成了几种膦亚胺,然后用甲基溴化镁处理,以高产率和有希望的非对映异构体比例得到两种非对映异构体。然后将显示出最佳结果的 N-[(叔丁基)(苯基)膦酰基]苯扎二亚胺进行各种格氏试剂的 1,2-加成,以评估由于立体磷原子引起的最佳手性诱导。以极好的收率和中等至极好的非对映异构体比率获得了相应的加合物。