Studies on the kinetics of tripropylammonium fluorochromate oxidation of some aromatic alcohols in non-aqueous media
作者:S. Sheik Mansoor、S. Syed Shafi
DOI:10.1016/j.molliq.2010.05.012
日期:2010.8
The oxidation of benzyl alcohol (BnOH) and a few para-substituted benzyl alcohols by tripropylammonium fluorochromate (TriPAFC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding aldehydes. The reaction is first order each in TriPAFC and the alcohols. The reaction is catalysed by hydrogen ions. The hydrogen ion dependence has the form: kobs = a + b[H+]. The oxidation of α α′-dideuterio
苄基醇(BnOH)和一些对位取代的苄醇在二甲亚砜(DMSO)中被氟代三丙基氟铬酸铵(TriPAFC)氧化导致形成相应的醛。该反应在TriPAFC和醇中均为一级反应。该反应由氢离子催化。氢离子依赖性具有以下形式:k obs = a + b [H + ]。αα'-二氘代苄醇的氧化表现出显着的一级动力学同位素效应(k H / k D = 303 K时为5.45)。在19种不同的有机溶剂中研究了苯甲醇的氧化。已使用Kamlet和Swain多参数方程分析了溶剂效应。提出了一种通过铬酸酯转移氢离子的机理。