School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
Org Lett. 2011 Jun 17;13(12):3060-3. doi: 10.1021/ol2009472. Epub 2011 May 19.
The synthesis of imidazolinium salts from the reaction of formamidines and (2-bromoethyl)diphenylsulfonium triflate is described. A variety of symmetrical and unsymmetrical imidazolinium triflate salts were synthesized in high yield in short reaction times under mild conditions. Aromatic and aliphatic N-substituents work well. The reaction is proposed to proceed via generation of a vinyl sulfonium salt intermediate from the bromoethylsulfonium triflate.
本文描述了由甲脒和（2-溴乙基）二苯基砜三氟甲磺酸酯反应合成咪唑啉盐。在温和条件下，通过短时间反应以高产率合成了各种对称和不对称的咪唑啉三氟甲磺酸酯盐。芳基和脂肪族 N-取代基均能很好地反应。该反应被认为是通过溴代乙基砜三氟甲磺酸酯生成乙烯基砜盐中间体进行的。
