作者:Michael R. Crampton、Peter M. Lowry、Ian J. Smith
DOI:10.1039/b803070g
日期:——
studies of the reactions of some hydroxyalkanesulfonates, 1, with aniline derivatives, 2, show the formation at equilibrium of anilinoalkanesulfonates, 3. Kinetic studies in water are consistent with a mechanism involving dissociation of 1 to give the parent aldehyde, which reacts with 2 to give a carbinolamine. Acid-catalysed dehydration of the carbinolamine yields an iminium ion which reacts rapidly
(1)某些羟基链烷磺酸盐1与苯胺衍生物2的反应的1 H NMR研究表明,苯胺基链烷磺酸盐3处于平衡状态。在水中的动力学研究与涉及1分解为母体醛的机理一致,与2反应生成甲醇胺。酸催化的甲醇胺脱水生成亚胺离子,该亚胺离子与亚硫酸盐快速反应生成产物3。研究pH随反应速率常数的变化而变化,表明形成甲醇胺的速率决定步骤的性质发生了变化随着pH值的增加,脱去甲醇胺脱水。根据电子和空间效应,讨论了速率常数和平衡常数值(具有1和2的性质)的变化。