Hexamethyldisilazane as an Acylation Generator for Perfluorocarboxylic Acids in Quantitative Derivatization of Primary Phenylalkyl Amines Confirmed by GC/MS and Computations
作者:Borbála Molnár、Antal Csámpai、Ibolya Molnár-Perl
DOI:10.1021/ac503786j
日期:2015.1.20
derivatization processes were determined by gas chromatography/mass spectrometry. Reaction conditions were optimized depending on reagents’ molar ratios, solvents, and temperatures applied. The new acylation method, in comparison to the traditional ones, obtained with trifluoroacetic anhydride, heptafluorobutyric anhydride, and N-methyl-bis(trifluoroacetamide), offers numerous advantages. Derivatives
注意到使用六甲基二硅氮烷(HMDS)和全氟羧酸(PFCA)对伯苯基烷基胺(PPAA)进行新颖的选择性酰化。HMDS和三氟乙酸,HMDS和五氟丙酸或HMDS和七氟丁酸之类的偶合物触发PPAA的定量酰化反应。通过应用所有偶对衍生化苄基,2-苯基乙基,3-苯基丙基,4-苯基丁基胺及其相关取代形式,来表征工艺的选择性。脂肪胺是不反应的。通过气相色谱/质谱法确定衍生化过程中的鉴定,定量,比例和化学计量。根据试剂的摩尔比,溶剂和施加的温度对反应条件进行了优化。与传统方法相比,新的酰化方法N-甲基-双(三氟乙酰胺)具有许多优点。夫妻提供的衍生物可以直接注入到色谱柱中,避免了物种损失,节省了制备过程中的时间,工作和成本。由于传统试剂由于氮气干燥而过度蒸发,因此三氟酰化物质的损失证明为65%或更少。关于七氟丁酰基物质,它们的损失在25%至5%之间变化。用HMDS和PFCA对获得的统一的巨大响应归因于它们直接