Friedel-Crafts Acylation and Related Reactions Catalyzed by Heteropoly Acids Научная публикация
| Конференция |
First International Conference on Highly Organized Catalytic Systems 24-27 июн. 2002 , Черноголовка |
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| Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Вых. Данные | Год: 2003, Том: 44, Номер: 2, Страницы: 175-182 Страниц : 8 DOI: 10.1023/A:1023344210304 | ||||
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Реферат:
The Friedel-Crafts acylation of anisole (AN) with acetic anhydride (AA) and the Fries rearrangement of phenyl acetate in the liquid phase catalyzed by bulk and silica-supported heteropoly acids (HPA), mainly H3PW12O40 (PW), have been studied. In anisole acylation, PW exhibits very high activiity, yielding up to 98% para and 2-4% ortho isomer of methoxyacetophenone (MOAP) at 90-110degreesC and an AN/AA molar ratio of 10-20. The reaction appears to be heterogeneously catalyzed; no contribution of homogeneous catalysis by HPA was observed. PW is almost 100 times more active than the zeolite H-Beta, which is in agreement with the higher acid strength of HPA. The PW catalyst is reusable, although gradual decline of activity was observed due to the coking of the catalyst. The acylation is inhibited by the product because of adsorption of MOAP on the catalyst surface. In contrast to anisole, the acylation of toluene with HPA is far less efficient than that with H-Beta. Evidence is provided that the activity of HPA in toluene acylation is inhibited by preferential adsorption of acetic anhydride on the catalyst. It is demonstrated that PW is a very efficient and reusable catalyst for the Fries rearrangement of phenyl acetate in homogeneous or heterogeneous liquid-phase systems at 100-150degreesC.
Библиографическая ссылка:
Kaur J.
, Kozhevnikova E.F.
, Griffin K.
, Harrison B.
, Kozhevnikov I.V.
Friedel-Crafts Acylation and Related Reactions Catalyzed by Heteropoly Acids
Kinetics and Catalysis. 2003. V.44. N2. P.175-182. DOI: 10.1023/A:1023344210304 WOS Scopus РИНЦ CAPlus OpenAlex
Friedel-Crafts Acylation and Related Reactions Catalyzed by Heteropoly Acids
Kinetics and Catalysis. 2003. V.44. N2. P.175-182. DOI: 10.1023/A:1023344210304 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная версия:
Каур Д.
, Кожевникова Е.Ф.
, Гриффин Л.
, Харрисон Б.
, Кожевников И.В.
Ацилирование по Фриделю-Крафтсу и родственные реакции, катализируемые гетерополикислотами
Кинетика и катализ. 2003. Т.44. №2. С.190-197. РИНЦ РЖ ВИНИТИ
Ацилирование по Фриделю-Крафтсу и родственные реакции, катализируемые гетерополикислотами
Кинетика и катализ. 2003. Т.44. №2. С.190-197. РИНЦ РЖ ВИНИТИ
Даты:
| Поступила в редакцию: | 28 авг. 2002 г. |
| Опубликована в печати: | 1 мар. 2003 г. |
Идентификаторы БД:
| Web of science: | WOS:000182774300003 |
| Scopus: | 2-s2.0-0038721120 |
| РИНЦ: | 13672989 |
| Chemical Abstracts: | 2003:290159 |
| OpenAlex: | W2471593672 |