A new type of cascade reaction: direct conversion of carbonyl compounds and malononitrile into substituted tetracyanocyclopropanes
作者:Michail N. Elinson、Anatolii N. Vereshchagin、Nikita O. Stepanov、Alexey I. Ilovaisky、Alexander Ya. Vorontsov、Gennady I. Nikishin
DOI:10.1016/j.tet.2009.05.062
日期:2009.8
A new type of chemical cascadereaction was found: the direct formation of cyclopropanes from carbonyl compounds and C–H acid. The action of free halogen or active halogen containing compounds on a mixture of 1 equiv of carbonyl compound and 2 equiv of malononitrile in a basic alcohol solution results in the formation of substituted 1,1,2,2-tetracyanocyclopropanes in 15–80% yield. The latter are well-known
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
Pyridinium bromide as a mediator in electrochemical reactions: the preparation of cyclopropane-1,1-dicarbonitriles
作者:Anatoly N. Vereshchagin、Evgeniya O. Dorofeeva、Michail N. Elinson、Mikhail P. Egorov
DOI:10.24820/ark.5550190.p011.041
日期:——
Pyridinium bromide has been tested as a new mediator for electrochemical transformations in methanol and acetonitrile. An efficient protocol for the synthesis of cyclopropanes via the electrochemical transformations of alkylidenemalononitriles and C-H acids (malononitrile, malonic ester, N,N-dimethylbarbituric acid, pyrazolin-5-ones) has been developed. The chemistry proceeds in a simple undivided
One-pot transformations of tetracyanocyclopropanes into highly functionalized pyridines
作者:Anastasiya I. Ershova、Oleg E. Nasakin、Oleg V. Ershov
DOI:10.1007/s10593-023-03240-9
日期:2023.8
An effective method has been developed for the synthesis of 2-amino-4-aryl-6-chloropyridine-3,5-dicarbonitriles from 3-arylcyclopropane-1,1,2,2-tetracarbonitriles by treating the starting materials with sodium hydride in anhydrous DMF, followed by HCl in isopropanol.
Pyridinium bromide as a new mediator for electrochemical transformations involving CH-acids
作者:Anatoly N. Vereshchagin、Evgeniya O. Dorofeeva、Michail N. Elinson、Victor A. Korolev、Mikhail P. Egorov
DOI:10.1016/j.mencom.2019.07.010
日期:2019.7
Pyridinium bromide has been tested as a new mediator for electrochemical synthesis of functionalized cyclopropane from alkylidenemalononitriles and CH-acids. The process was performed in an undivided cell with the use of substoichiometric amount of PyHBr that serves both as a mediator and a supporting electrolyte, and MeOH or MeCN as the solvents.