A Catalyst‐free Green Protocol for the Synthesis of Pyranopyrazoles Using Room Temperature Ionic Liquid Choline Chloride‐urea. (5th May 2014)

• Record Type: Journal Article
• Authors: Swaroop, Toreshettahally R.; Sharath Kumar, Kothanahally S.; Palanivelu, Mariyappan; Chaitanya, Somu; Rangappa, Kanchugarakoppal S.
• Is Part Of: Journal of heterocyclic chemistry. Volume 51:Number 6(2014)
• Page Start: 1866
• Page End: 1870
• Publication Date: 2014-05-05
• Subjects: Heterocyclic compounds -- Periodicals; 547.59
• DOI: 10.1002/jhet.1864
• Languages: English
• ISSNs: 0022-152X

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>An efficient and rapid four component reaction of aldehydes, malanonitrile, β‐ketoesters and hydrazine hydrate (or phenyl hydrazine) in environmentally benign room temperature ionic liquid choline chloride‐urea has been developed for the synthesis of substituted 4<italic>H</italic>‐pyrano[2, 3‐c]pyrazoles.</p> </abstract>