Methyltriphenoxyphosphonium iodide (MTPI); induced dehydration and dehydrohalogenation in aprotic solvents
作者:Charles W. Spangler、Douglas P. Kjell、Lori L. Wellander、Mary A. Kinsella
DOI:10.1039/p19810002287
日期:——
Methyltriphenoxyphosphonium iodide (MTPI) is an effective dehydration and dehydrohalogenation reagent under mild conditions when 1,3-dimethylimidazolidin-2-one is used as an aprotic solvent in place of the more normally used hexamethylphosphoric triamide (HMPT). Since previously suggested mechanisms had proposed alcohol–HMPT interaction as an important mechanistic step, this result coupled with comparative
当将1,3-二甲基咪唑啉-2--2-酮用作质子惰性溶剂代替更常用的六甲基磷三酰胺(HMPT)时,甲基三苯氧基碘化碘(MTPI)在温和条件下是一种有效的脱水和脱卤化氢试剂。由于先前提出的机制已将醇-HMPT相互作用作为重要的机理步骤提出,因此该结果与可比较的产物几何异构体分布以及共轭:非共轭三烯产物比率相结合得出的结论是,MTPI-醇与酚盐的置换相互作用是最重要的。反应的第一步。在二甲基亚砜(DMSO)中,DMSO-MTPI相互作用阻止了醇的脱水,从而生成了二甲基硫醚。