Polar radicals XVIII. On the mechanism of chlorination by N-Chloroamines: Intermolecular and intramolecular abstraction
作者:Dennis D. Tanner、Richard Arhart、Christian P. Meintzer
DOI:10.1016/s0040-4020(01)97198-4
日期:1985.1
pronounced in the more polar protic solvent. The reagent, N-chlorodimethylamine, generated the dimethylamminium radical, whose reaction showed a polar sensitivity toward hydrogen abstraction similar to that of the chlorine atom, but exhibiting a much greater secondary/primary selectivity. Comparison of the isomer distributions obtained from the self photochlorination reactions of N-chloro--hexylmethylamine
使用六氯丙酮中的分子氯或15%CD 3 CO 2 D / 85%H 2 SO 4对-丁基,-戊基和-己基三甲基氯化铵进行光氯化描述了在酸性溶剂中使用N-氯二甲基胺或使用N-氯二甲基胺。铵基团对取代位点具有很强的极性导向作用。发现在极性更强的质子溶剂中这种作用更为明显。N-氯二甲基胺试剂生成了二甲基铵基团,其反应显示出对吸氢的极性敏感性与氯原子相似,但具有更高的仲/伯选择性。从N-氯代-己基甲胺和N-氯代-己胺的自光氯化反应获得的异构体分布的比较酸溶剂中的-戊基甲胺具有通过N-氯二甲基胺氯化铵盐而获得的分布模式,这表明N-氯胺的自氯化反应是通过先前提出的分子内氢提取机理进行的。