Electrocatalytic transformation of malononitrile and cycloalkylidenemalononitriles into spirotricyclic and spirotetracyclic compounds containing cyclopropane and pyrroline fragments
摘要:
Electrolysis of cycloalkylidenemalononitriles and malononitrile in MeOH in all undivided cell in the presence of the NaBr-NaOMe mediator system gives spirotricyclic compounds containing cyclopropane and pyrroline fragments in 50-77% yields. Spirobicyclic and spirotricyclic tetracyanocyclopropanes undergo electrolysis ill alcohols to afford spirotricyclic and spirotetracyclic products containing cyclopropane and pyrroline fragments ill 50-93% yields.
在不分开的电解槽中,在碱金属卤化物存在下,丙二腈和羰基化合物的电解导致取代的1,1,2,2-四氰基环丙烷的形成,产率为60-90%。使用丙二腈代替溴丙二腈成功进行了Wideqvist反应的这种电催化变体。在未分开的电池中,甲醇或乙醇中取代的1,1,2,2-四氰基环丙烷的电催化转化导致取代的2-氨基-4,4-二烷氧基-1,5-二氰基-3-氮杂双环[3.1.0] hex-通过0.05-0.10 F / mol的电量后,二烯的产率为70-95%。
One-pot cascade assembling of 3-substituted tetracyanocyclopropanes from alkylidenemalononitriles and malononitrile by the only bromine direct action
作者:Anatolii N. Vereshchagin、Michail N. Elinson、Nikita O. Stepanov、Gennady I. Nikishin
DOI:10.1016/j.mencom.2009.11.010
日期:2009.11
The new cascade reaction was found: the formation of cyclopropanes from alkylidenemalononitriles and malononitrile by the only bromine direct action; the action of aqueous bromine on the equal amounts of alkylidenemalononitriles and malononitrile in EtOH–H 2 O solutions results in the formation of 3-substituted 1,1,2,2-tetracyanocyclopropanes in 55–98% yields.
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
Electrochemical transformation of malononitrile and ketones into 3,3-disubstituted-1,1,2,2-tetracyanocyclopropanes
作者:Gennady I. Nikishin、Michail N. Elinson、Tatyana L. Lizunova、Bogdan I. Ugrak
DOI:10.1016/s0040-4039(00)78810-1
日期:1991.6
Electrolysis of malononitrile in the presence of ketones and NaBr in ethanol in undivided cell results in formation of 3,3-disubstituted-1, 1, 2, 2-tetracyanocyclopropanes.
Electrocatalytic transformation of malononitrile and cycloalkylidenemalononitriles into spirobicyclic and spirotricyclic compounds containing 1,1,2,2-tetracyanocyclopropane fragment
作者:M. N. Elinson、S. K. Fedukovich、A. N. Vereshchagin、A. S. Dorofeev、D. E. Dmitriev、G. I. Nikishin
DOI:10.1023/b:rucb.0000011884.08799.a7
日期:2003.10
Electrolysis of malononitrile and cycloalkylidenemalononitriles in EtOH in an undivided cell in the presence of NaBr affords spirobicyclic Compounds containing a 1,1,2,2-tetra-cyanocyclopropane fragment in 50-88% yields.