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Title: | Sulfated zirconia and phosphotungstic acid catalyzed synthesis of some biologically potent heterocyclic compounds |
Authors: | Kumar, Dalip |
Keywords: | Chemistry Sulfated Zirconia-catalyzed Phosphotungstic acid catalyzed Synthesis |
Issue Date: | 2006 |
Publisher: | BCSI |
Abstract: | Sulfated zirconia and phosphotungstic acid (PWA) have been used as catalysts for the synthesis of some biologically potent 3,4-dihydropyrimidin-2(1H)-ones and aryl-14Hdibenzo[ a.j]xanthenes under solvent free conditions. Both the solid acid catalysts are found to be active for the synthesized compounds under mild reaction conditions. The 3,4-dihydropyrimidin-2(1H)-ones were synthesized in a single step using multicomponent condensation of aryl aldehyde, urea derivatives and β-dicarbonyl compounds using PWA or sulfated zirconia as catalysts. The generality of this protocol has been demonstrated by synthesizing a variety of functional dihydropyrimidin-2(1H)-ones in excellent yield and short reaction time. Phosphotungstic acid has also been demonstrated as an efficient catalyst for the condensation of aryl aldehydes and β-napthol to produce aryl-14H-dibenzo[a.j]xanthenes under solvent-free conditions. The reaction is found to proceed quickly in presence of catalytic amount of phosphotungstic acid and brief exposure to microwave to afford the products in good yield. |
URI: | https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwixwfay493zAhV7zTgGHZIiDdAQFnoECAQQAQ&url=https%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.564.3857%26rep%3Drep1%26type%3Dpdf&usg=AOvVaw33V14eFgxhNiDutvY3sB7_ http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/3076 |
Appears in Collections: | Department of Chemistry |
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