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Document Type |
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Article In Journal |
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Document Title |
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Cycloaddition of diphenylnitrilimine to coumarins. The synthesis of 3a,9b-dihydro-4-oxo-1H-benzopyrano[4,3-c]pyrazole derivatives الإضافة الحلقية للدايفنلنيتريللإيمين إلي كيومارين ، تشييدمشتقات الـ 3a,9b-dihydro-4-oxo-1H-benzopyrano[4,3-c]pyrazole |
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Subject |
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Organic Chemistry |
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Document Language |
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English |
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Abstract |
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The cycloaddn. of PhCCl:NNHPh (I) to a series of coumarins in C6H6 and Et3N gave benzopyrano[4,3-c]pyrazoles II (R = H, Ac, Bz, EtO2C, R1 = H; R = H, R1 = 7-OMe, 8-Me). In EtONa-EtOH, the reaction between coumarin and I afforded no cycloadducts, but yielded o-(EtO2CCH:CH)C6H4OCPh:NNHPh. The regiochem. of the cycloaddn. was rationalized with frontier MO theory. |
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ISSN |
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0040-4040-85 |
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Journal Name |
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Tetrahedron |
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Volume |
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41 |
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Issue Number |
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10 |
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Publishing Year |
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1405 AH
1985 AD |
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Article Type |
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Article |
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Added Date |
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Monday, June 23, 2008 |
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Researchers
| احمد سامي شوالي | Shawali, Ahamed S. | Investigator | Doctorate | halbar@kau.edu.sa |
| بهجت أ. الطويل | Altawil, bahgat A. | Researcher | Doctorate | halbar@kau.edu.sa |
| حسن عبدالقادر البار | Albar, Hassan Abdulkader | Researcher | Master | halbar@kau.edu.sa |
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Files
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39069.pdf
| pdf | مستخلص البحث |
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39070.pdf
| pdf | كامل المقالة - ويعتبر جزء من النتائج التي حصلت عليها خلال مسيرتي البحثية للحصول على درجة الماجستير من جامعة الملك عبد العزيز - جده - السعودية |
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