A New Three-Component Coupling reaction of Aryl Glyoxal, Malononitrile, and 4-Hydroxy Coumarin Catalysed by Recyclable Tio2 nanoparticles. (August 2014)

• Record Type: Journal Article
• Authors: Khodabakhshi, Saeed; Shahamirian, Mozhgan; Baghernejad, Mojtaba
• Is Part Of: Journal of chemical research. Volume 38:Number 8(2014)
• Page Start: 473
• Page End: 476
• Publication Date: 2014-08
• Subjects: aryl glyoxal -- pyrano[3, 2-c]chromene-5-one -- TiO2 nanoparticle catalyst; Chemistry -- Research -- Periodicals; Chemistry -- Periodicals; 540.5
• DOI: 10.3184/174751914X14050999895192
• Languages: English
• ISSNs: 1747-5198

Abstract

Aryl glyoxals reacted with malononitrile and 4-hydroxycoumarin in the presence of a catalytic amount of TiO2 nanoparticles to give a hitherto unknown family of pyranochromenes in up to 80% yield. This new three-component reaction yielded some novel pyrano[3, 2-c]chromene-5-ones containing an aroyl substituent. Using a recyclable and safe catalyst along with a green solvent system made the process eco-friendly and economic.