Thionations Using a P<sub>4</sub>S<sub>10</sub>−Pyridine Complex in Solvents Such as Acetonitrile and Dimethyl Sulfone
作者:Jan Bergman、Birgitta Pettersson、Vedran Hasimbegovic、Per H. Svensson
DOI:10.1021/jo101865y
日期:2011.3.18
Tetraphosphorusdecasulfide (P4S10) in pyridine has been used as a thionatingagent for a long period of time. The moisture-sensitive reagent has now been isolated in crystalline form, and the detailed structure has been determined by X-ray crystallography. The thionating power of this storable reagent has been studied and transferred to solvents such as acetonitrile in which it has proven to be synthetically
四硫化二磷(P 4 S 10)中的吡啶已长期用作硫代剂。现在已经以结晶形式分离出对水分敏感的试剂,并且已经通过X射线晶体学确定了详细的结构。已经研究了这种可储存试剂的去硫能力,并将其转移到诸如乙腈之类的溶剂中,在该溶剂中已证明其在合成上是有用的并且具有非凡的选择性。它的性能已经与所谓的Lawesson试剂(LR)进行了比较。特别有趣的是在相对较高的温度(约165°C)下以二甲基砜为溶剂进行硫磺化的结果。在这些条件下,例如,a啶酮和3-乙酰吲哚可以迅速转化为相应的亚硫代衍生物。甘氨酰甘氨酸类似地得到哌嗪去甲酮。在这些温度下 LR由于快速分解而效率低下。硫代产物通常更清洁并且更容易获得,因为在结晶试剂中,常规试剂P中始终存在杂质吡啶或LR中的4 S 10已被除去。
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