Dual Stereochemical Control in Reaction of Di- and Trialkyl Phosphites with Aldimines
作者:G. A. Kachkovskii、N. V. Andrushko、S. Yu. Sheiko、O. I. Kolodyazhnyi
DOI:10.1007/s11176-005-0502-9
日期:2005.11
and trialkyl phosphites to C=N compounds was investigated. Reactions of achiral dialkyl phosphites with chiral aldimines as well as that of chiral di-(1 R ,2 S ,5 R )-menthyl phosphite with achiral aldimines result in low diastereomeric enrichment of the addition compound. Reaction stereoselectivity increased when supplementary chiral inductor was introduced to the reaction system. Reaction of di-(1 R
研究了将亚磷酸二烷基酯和亚磷酸三烷基酯添加到C = N化合物中的立体化学。非手性亚磷酸二烷基酯与手性醛亚胺的反应以及手性二-(1 R ,2 S ,5 R )-薄荷基亚磷酸酯与非手性醛亚胺的反应导致加成化合物的非对映异构体富集度低。当将补充手性诱导剂引入反应体系时,反应立体选择性增加。亚磷酸二(1 R ,2 S ,5 R )-薄荷基亚磷酸酯与( S )-α-甲基苄基苯甲二胺以一致的不对称诱导进行,形成了一种实际上是N-取代的氨基膦酸的非对映异构体。然而,二- (1反应 - [R ,2 小号 ,5 - [R )-薄荷基酯与( [R )-α-methylbenzylbenzaldimine进行不一致不对称诱导,并且产物的非对映体富集低。通过化学推断,确定了所形成化合物的绝对构型。三((1 R ,2 S ,5 R 亚磷酸薄荷基酯在三氟化硼醚化物的存在下与C = N化合物反应形成氨基膦酸衍生物,其绝对构型与二亚磷酸(1