کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
67519 | 48485 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave-assisted and Zn[l-proline]2 catalyzed tandem cyclization under solvent free conditions: Rapid synthesis of chromeno[4,3-c]pyrazol-4-ones
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microwave-assisted and Zn[l-proline]2 catalyzed tandem cyclization under solvent free conditions: Rapid synthesis of chromeno[4,3-c]pyrazol-4-ones Microwave-assisted and Zn[l-proline]2 catalyzed tandem cyclization under solvent free conditions: Rapid synthesis of chromeno[4,3-c]pyrazol-4-ones](/preview/png/67519.png)
چکیده انگلیسی
Present study and investigations reveals that, the hydrazones of 3-acetyl-4-hydroxycoumarin undergo ring cyclization to give, 3-methyl-1-substituted phenyl-1H-chromeno[4,3-c]pyrazol-4-ones (2a–m) under the influence of microwave irradiation and by using Zn[l-proline]2, a novel Lewis acid catalyst. The overall yields of the products were found to be 82–93%. Without use of the catalyst, no reaction progress was observed. No significant changes in the overall yields of the products were observed at high microwave power and at high temperatures. The reusability of the catalyst was also checked and found up to seven cycles.
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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 275, Issues 1–2, 17 September 2007, Pages 148–152
Journal: Journal of Molecular Catalysis A: Chemical - Volume 275, Issues 1–2, 17 September 2007, Pages 148–152
نویسندگان
Atul Manvar, Pravin Bochiya, Vijay Virsodia, Rupesh Khunt, Anamik Shah,