A Convenient One-Pot Synthesis of Substituted 1,1-Dicyanocyclopropanes from Sulfonium Salts, Malononitrile, and Carbonyl Compounds
作者:Anatoliy Shestopalov、Aleksandr Shestopalov、Lyudmila Rodinovskaya、Sergey Zlotin、Vladimir Nesterov
DOI:10.1055/s-2003-42471
日期:——
The three-component reaction of sulfonium salts 1, malononitrile 3, and aldehydes 2 in the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) or in EtOH in the presence of Et3N is a convenient one-pot method for synthesis of substituted 1,1-dicyanocyclopropanes (7 and 9). The reaction of compounds 1-3 occurs stereoselectively to form substituted trans-cyclopropanes (7), whose structures were confirmed by the data of physicochemical methods, including X-ray diffraction analysis. The yield of cyclopropanes produced by the reaction in the ionic liquid is 8-21% higher than that in EtOH.
在离子液体1-丁基-3-甲基咪唑六氟磷酸盐([BMIM][PF6])或乙醇中,在乙腈存在的情况下,硫鎓盐1、丙二腈3和醛2的三元反应是一种合成取代1,1-二氰基环丙烷(7和9)的便捷的一锅法。化合物1-3发生立体选择性反应,形成取代的环丙烷(7),其结构通过物理化学方法的数据(包括X射线衍射分析)得到证实。在离子液体中反应产生的环丙烷的产量比在乙醇中反应产生的环丙烷的产量高8-21%。