Soft and hard acidity in ion-exchanged Y zeolites: rearrangement of 2-bromopropiophenone ethylene acetal to 2-hydroxyethyl 2-phenylpropanoate
…, A Corma, V Fornés, H García, A Martínez…
文献索引：Baldovi, Maria V.; Corma, Avelino; Fornes, Vicente; Garcia, Hermenegildo; Martinez, Agustin; Primo, Jaime Journal of the Chemical Society, Chemical Communications, 1992 , # 13 p. 949 - 951
The rearrangement of the cyclic ethylene acetal of 2-bromopropiophenone to 2-hydroxyethyl 2-phenylpropanoate is catalysed by zinc exchanged Y zeolites with higher activity than the conventional ZnCl2; hydrolysis of the acetal moiety owing to the Brønsted acid sites is one of the major side reactions, while the competitive formation of 5-methyl-6-phenyl-2, 3-dihydro- 1, 4-dioxine increases with the softness of the Lewis acid centres.
