The quest for sulfoquinone imine intermediates in the reaction of sulfanilic acid derivatives with nucleophiles
作者:Sergio Thea、Daniele Vigo、Giorgio Cevasco
DOI:10.1039/b108215a
日期:2002.2.25
of the common associative, SN2 mechanism, the former shows somewhat different features suggesting the incursion of a mechanism of the dissociative type involving a sulfoquinone imine species as a reaction intermediate. The alkaline hydrolyses of the corresponding sulfonyl fluorides and 2,4-dinitrophenyl esters, whose leaving groups are worse than Cl− as leaving groups, are all associative.
动力学和捕集研究的数据表明,碱水解 磺酰氯相应的N-乙酰基衍生物的R 1和R 2遵循不同的反应途径。虽然后一种化合物的结果与常见的缔合S N 2机理的发生完全一致,但前者显示出一些不同的特征,表明涉及磺醌亚胺类化合物的分解型机理的引入。反应中间体。相应的磺酰基氟化物和2,4-二硝基苯基酯,其离去基团为氯比恶化的碱性水解-作为离去基团,都关联。