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
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