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Friedel‐Crafts acylation of benzene derivatives catalyzed by silica and alumina‐supported polytrifluoromethanesulfosiloxane
Author(s) -
Zhou DaQing,
Zhang YanHong,
Huang MeiYu,
Jiang YingYan
Publication year - 2003
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.321
Subject(s) - benzene , acylation , friedel–crafts reaction , yield (engineering) , catalysis , organic chemistry , chemistry , medicinal chemistry , materials science , polymer chemistry , nuclear chemistry , composite material
Inorganic polymer, silica and alumina‐supported polytrifluoromethanesulfosiloxane solid superacids (abbreviated as SiO 2 ‐Si‐SCF 3 and Al 2 O 3 ‐Si‐SCF 3 ), have been prepared. The acid strength of superacids is higher than that of 100% H 2 SO 4 . It was found that SiO 2 ‐Si‐SCF 3 and Al 2 O 3 ‐Si‐SCF 3 could catalyze Friedel–Crafts acylation of benzene and benzene derivatives with aroyl chlorides under relatively mild conditions. The yield could amount to 97.6% and 92.1% respectively. The yield and the isomer distribution of corresponding ketones were influenced by reaction temperature and reaction time. The catalysts have considerably high stability and can be reused repeatedly without any large changes in their catalytic activity. The reactions are very clean, with HCl as the only by‐product escaping during the reaction. Copyright © 2003 John Wiley & Sons, Ltd.