The endocyclic restriction test: determination of the transition-structure geometry for the transfer of oxygen from N,N-dialkylhydroxylamines to triarylphosphines
作者:Mitchell L. Kurtzweil、Dekai Loo、Peter Beak
DOI:10.1021/ja00055a009
日期:1993.1
The transfers of oxygen from nitrogen to phosphorus in the conversions of 1 to 2 and 3 to 4 are shown by kinetic, solvent-labeling, and double-labeling criteria to be intramolecular reactions. This information in conjunction with the stabilities of 13 and 14 is taken to rule out the mechanisms of classic linear S N 2 substitutions at oxygen or nitrogen, biphilic insertion, or a radical chain reaction
在 1 到 2 和 3 到 4 的转化中,氧从氮到磷的转移通过动力学、溶剂标记和双标记标准显示为分子内反应。该信息与 13 和 14 的稳定性一起被用来排除经典线性 SN 2 氧或氮取代、双亲插入或自由基链反应的机制,并有利于通过 10-P-5 物种的反应( 18)。结果似乎提供了第一个实验证明,氧气可以以斜角转移