Highly efficient one-pot cascade cyclization of 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles into spirocyclopropyl pyrazolones
作者:Anatoly N. Vereshchagin、Michail N. Elinson、Alexander D. Korshunov、Mikhail P. Egorov
DOI:10.1016/j.mencom.2016.01.008
日期:2016.1
Bromine-assisted one-pot cascade cyclization of 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles affords medicinally relevant spirocyclopropyl pyrazolones in 60-97% yields.
Sodium acetate catalyzed tandem Knoevenagel–Michael multicomponent reaction of aldehydes, 2-pyrazolin-5-ones, and cyano-functionalized C–H acids: Facile and efficient way to 3-(5-hydroxypyrazol-4-yl)-3-aryl-propionitriles
作者:Michail N. Elinson、Ruslan F. Nasybullin、Gennady I. Nikishin
DOI:10.1016/j.crci.2013.03.003
日期:2013.9
Abstract Sodium acetate catalyzed multicomponent reaction of aryl aldehydes, 2-pyrazolin-5-ones, and malononitrile or alkyl cyanoacetates in alcohols results in the formation of substituted 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles in 80–99% yields. The developed efficient catalytic approach to the substituted 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles – the promising compounds
Electrocatalytic cyclization of 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles: ‘one-pot’ simple fast and efficient way to substituted spirocyclopropylpyrazolones
作者:Anatoly N. Vereshchagin、Michail N. Elinson、Evgeniya O. Dorofeeva、Ruslan F. Nasybullin、Ivan S. Bushmarinov、Alexander S. Goloveshkin、Mikhail P. Egorov
DOI:10.1016/j.electacta.2015.03.015
日期:2015.5
bromide as mediator results in fast and efficient cyclization with the formation of the substituted spirocyclopropylpyrazolones in 60–90% substance yield. The fast (35 min) electrocatalytic reaction smoothly proceeds under neutral and mild conditions. The implication of electrocatalysis in cascade cyclization reaction is an efficientapproach to medicinallyrelevant spirocyclopropylpyrazolones and