A new strategy of the chemical route to the cyclopropane structure: direct transformation of benzylidenemalononitriles and malononitrile into 1,1,2,2-tetracyanocyclopropanes
作者:Michail N. Elinson、Sergey K. Feducovich、Nikita O. Stepanov、Anatolii N. Vereshchagin、Gennady I. Nikishin
DOI:10.1016/j.tet.2007.11.027
日期:2008.1
The new reaction was found: the direct formation of cyclopropanes from activated olefins and C–H acids. The action of free halogen or active halogen containing compounds on the equal amounts of benzylidenemalononitriles and malononitrile in basic alcohol solutions results in the formation of 3-aryl-1,1,2,2-tetracyanocyclopropanes in 65–95% yields. Thus, the new simple and efficient way to 3-aryl substituted
发现了新的反应:由活化的烯烃和CHH酸直接形成环丙烷。在碱性醇溶液中,游离卤素或含活性卤素的化合物对等量的苄亚甲基丙二腈和丙二腈的作用导致形成3-芳基-1,1,2,2-四氰基环丙烷,产率为65-95%。因此,直接从诸如亚苄基丙二腈和丙二腈之类的简单而合理的起始化合物中直接发现了3-芳基取代的四氰基环丙烷的新的简单而有效的方法。