Benzenesulfonyl chloride with primary and secondary amines in aqueous media Unexpected high conversions to sulfonamides at high pH
作者:James F King、Manjinder S Gill、Petru Ciubotaru
DOI:10.1139/v05-154
日期:2005.9.1
usual second-order reaction of the sulfonyl chloride with the amine, two third-order terms (i) one first-order in sulfonyl chloride, amine and hydroxide anion, and (ii) another first-order in sulfonyl chloride and second-order in the amine. The importance of the third-order terms correlates approximately with the total number of alkyl carbon atoms in the amine, and this in turn is regarded as related
我们已经确定了苯磺酰氯与一组水溶性伯和仲胺反应的准一级条件下的 pH 产率曲线,并发现与某些胺,如二丁胺,曲线的形式为磺胺产量相对较高的 sigmoid pH 产率曲线,随着碱度的增加而持续,直至并包括 1.0 mol/L 氢氧化钠。除了通常的磺酰氯与胺的二级反应外,通过调用两个三级项 (i) 磺酰氯、胺和氢氧根阴离子中的一个一级项,以及 (ii) ) 磺酰氯中的另一个一级和胺中的二级。三阶项的重要性与胺中烷基碳原子的总数大致相关,而这又被认为与胺的疏水特性有关。测试这张图片的实验包括:(i)观察一个…