Chiral o-Methoxyaryldiazaphosphonamides − A New Class of Efficient Lewis Bases in the Catalytic Asymmetric Ring Opening of Cyclooctene Oxide with Silicon Tetrachloride
作者:Sébastien Reymond、Olivier Legrand、Jean Michel Brunel、Gérard Buono
DOI:10.1002/1099-0690(200108)2001:15<2819::aid-ejoc2819>3.0.co;2-r
日期:2001.8
The synthesis of a new class of chiral o-methoxydiazaphosphonamides (as Lewis bases) has been investigated, together with their use as catalysts in the asymmetric ring opening (ARO) of cyclooctene oxide with silicon tetrachloride. Enantiomeric excesses varying from 6 to 99% ee were observed, depending on the nature of the catalyst examined. On the basis of experimental considerations, a mechanistic
已经研究了一类新的手性邻甲氧基二氮杂膦酰胺(作为路易斯碱)的合成,以及它们在环辛烯氧化物与四氯化硅的不对称开环 (ARO) 中作为催化剂的用途。根据所检测的催化剂的性质,观察到了 6% 到 99% ee 的对映体过量。基于实验考虑,已经提出了涉及六配位硅物种的机械原理。