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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Chemical Methodologies
- نوع مقاله: Journal Article
- کلمات کلیدی: Quinoxaline,Boron Sulfonic Acid,Trimethyl borate,Triisopropyl borate,SBSA,STMB,STIPB
- چکیده:
- چکیده انگلیسی: A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamines with α-diketones in the presence of catalytic amount of boron sulfonic acid (BSA) and silica trimethyl borat (STMB) and silica triisopropyl borate (STIPB), as two novel heterogeneous Lewis acid catalysts at room temperature, is described. In this method, we proved that the BrØnsted acidic power of boron sulfonic acid (BSA) is more important than its Lewis acidity. Using this method, quinoxaline derivatives as biologically interesting compounds are produced in high to excellent yields.
- انتشار مقاله: 17-06-1397
- نویسندگان: Sami Sajjadifar,Vahid Azizkhania,Kaushik Pal,Hadi Jabbari,Omidali Pouralimardan,Faten Divsar,Sarvin Mohammadi-Aghdam,Issa Amini,Hoda Hamidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Journal of Green Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: Green chemistry,Dihydropyridines,quinoxaline derivatives,Solid acid,Ionic Liquid
- چکیده:
- چکیده انگلیسی: In this work, the efficiency, generality and applicability of new silica supported Brønsted acidic ionic liquid (BAIL) 1-methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium chloride as heterogeneous and green catalyst for organic transformations are studied. Herein, the following one-pot multi-component reactions in the presence of [Msei]Cl are investigated: (i) the synthesis of quinoxaline derivatives from phenylendiamine and 1,2-diketones in EtOH and under mild conditions (room temperature), (ii) the preparation of 1,4-dihydropyridines from one-pot multi component condensation of 1,3-dicarbonyl compounds(2 equiv.), NH4OAc (1.5 equiv.) and aldehydes (1 equiv.) under solvent-free conditions at moderate temperature (90 °C). High yields, relatively short reaction times, efficiency, generality, clean process, simple methodology, low cost, easy work-up, ease of preparation and regeneration of the catalyst and green conditions (in the synthesis of the quinoxaline derivatives) are advantages of the application of [Mesi]Cl as catalyst in the above organic reactions.
- انتشار مقاله: 10-03-1396
- نویسندگان: Sami Sajjadifar,Sarvin Mohammadi-Aghdam
- مشاهده