Chlorodiphenylphosphine as Highly Selective and Efficient Reagent for the Conversion of Alcohols, Tetrahydropyranyl and Silyl Ethers to Thiocyanates and Isothiocyanates
作者:Ghasem Aghapour、Ameneh Asgharzadeh
DOI:10.1080/10426507.2013.855771
日期:2014.6.3
efficient method is described for the conversion of primary alcohols, tetrahydropyranyl and silyl ethers to thiocyanates by use of chlorodiphenylphosphine and ammonium thiocyanate. Secondary substrates produce both the two isomeric products, thiocyanate and isothiocyanate, while tertiary ones give isothiocyanates as the only products by this new method. In contrast to previously reported methods based
摘要 描述了一种使用氯二苯基膦和硫氰酸铵将伯醇、四氢吡喃基和甲硅烷基醚转化为硫氰酸酯的简单、高选择性和高效的方法。二级底物产生两种异构产物,硫氰酸盐和异硫氰酸盐,而三级底物通过这种新方法产生异硫氰酸盐作为唯一的产物。与之前报道的基于三价磷进行这种转化的方法相比,本方法在三价磷 (ClPPh2) 存在下不需要亲电试剂。这些底物的活性顺序是甲硅烷基醚>醇>四氢吡喃基醚。本方法不仅有趣地区分了初级,二级和三级底物,但也将它们转化为相应的硫氰酸盐,在存在几个其他官能团的情况下具有出色的化学选择性。图形概要