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An efficient synthesis of 4-aryl-7-benzylidene-hexahydro-2H-cyclopenta[d] pyrimidin-2-ones/thiones catalyzed by p-dodecylbenzenesulfonic acid | ||
Iranian Journal of Catalysis | ||
مقاله 17، دوره 5، شماره 2، شهریور 2015، صفحه 175-182 اصل مقاله (927.21 K) | ||
نوع مقاله: Articles | ||
نویسندگان | ||
Krishnamoorthy Aswin1؛ Majid Ghashang2؛ Sheik Mansoor* 3 | ||
1Research Department of Chemistry, C. Abdul Hakeem College, Melvisharam – 632 509, India | ||
2Faculty of Sciences, Najafabad Branch, Islamic Azad University, Najafabad, Esfahan, Iran | ||
3C. Abdul Hakeem College Bio active Organic Molecule Synthetic Unit, Research Department of Chemistry, Melvisharam - India | ||
چکیده | ||
A new and efficient method has been developed for the synthesis of 4-aryl-7-benzylidene-1,3,4,5,6,7-hexahydro-2H-cyclopenta[d]pyrimidin-2-ones through Biginelli-like reaction of cyclopentanone, with urea/thiourea and aromatic aldehyde employing p-dodecylbenzenesulfonic acid (DBSA) as a recyclable catalyst under solvent-free condition. The recovered catalyst was recycled for further runs. The product formation takes place via a cross-aldol condensation of benzaldehyde with cyclopentanone in the presence of DBSA to produce benzylidene intermediate and subsequent Michael addition. The present approach offers the advantages of short reaction time, mild reaction conditions, high yields and convenient operation. All the products were obtained in good to excellent yields and the structures of the synthesized compounds were established by advanced spectroscopic data. | ||
کلیدواژهها | ||
Biginelli reaction؛ p-Dodecylbenzenesulfonic acid؛ Cyclopenta[d]pyrimidin-2-one؛ One-pot synthesis | ||
مراجع | ||
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