Chemoselective and scalable preparation of alkyl tosylates under solvent-free conditions
作者:Foad Kazemi、Ahmad R. Massah、Mohammad Javaherian
DOI:10.1016/j.tet.2007.03.083
日期:2007.6
improved method for the efficient tosylation of alcohols has been reported using two procedures (A and B). Procedure A: methanol, ethanol, benzyl alcohols, and valuable ethylene glycols can be converted into their corresponding alkyl tosylates in very fast, simple, and efficient grinding method using potassium carbonate as solid base. Other primary and secondary alcohols need to add potassium hydroxide
已经报道了使用两种方法(A和B)的有效的甲苯磺酸有效的改进方法。程序A:甲醇,乙醇,苄醇和有价值的乙二醇可以使用碳酸钾作为固体碱,以非常快速,简单和有效的研磨方法转化为相应的烷基甲苯磺酸盐。其他伯醇和仲醇需要向反应混合物中添加氢氧化钾(过程B)。对于这两种方法,观察到甲苯磺酸化的高选择性。即使在100 mmol的底物中,该方法也发现了放大能力。本方法是使用甲苯磺酰氯进行固态甲苯磺酸化的实例,并且由于无溶剂条件而成为绿色化学方法。