A new strategy for synthesis of 9-benzoyl-4-methylpyrano[2,3-f]chromene-2,8-dione using L-proline as a novel and efficient catalyst
- Авторы: Goud E.1, Rao Y.1, Hemasri Y.2, Thirupathi G.1
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Учреждения:
- Department of Chemistry
- Department of Chemistry, Nizam College
- Выпуск: Том 86, № 12 (2016)
- Страницы: 2732-2736
- Раздел: Article
- URL: https://journals.rcsi.science/1070-3632/article/view/216849
- DOI: https://doi.org/10.1134/S1070363216120331
- ID: 216849
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Аннотация
We report the high yield synthesis of novel 9-benzoyl-4-methylpyrano[2,3-f]chromene-2,8-dione derivatives obtained by the reaction of 8-formyl-7-hydroxy-4-methylcoumarin with various active methylene compounds. A mechanism of the tandem Knoevenagel condensation and cyclisation reaction is proposed. Structures of all compounds were elucidated on the basis of 1H and 13C NMR, and mass spectrometry, and elemental analysis.
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E. Goud
Department of Chemistry
Email: erukalayadaiahgoud@gmail.com
Индия, Hyderabad, Telangana, 500007
Y. Rao
Department of Chemistry; Department of Chemistry
Автор, ответственный за переписку.
Email: erukalayadaiahgoud@gmail.com
Индия, Hyderabad, Telangana, 500007; Nizamabad, 503322
Y. Hemasri
Department of Chemistry, Nizam College
Email: erukalayadaiahgoud@gmail.com
Индия, Hyderabad, 500001
G. Thirupathi
Department of Chemistry
Email: erukalayadaiahgoud@gmail.com
Индия, Hyderabad, Telangana, 500007