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Friedel‐Crafts benzylation of benzene derivatives catalyzed by silica and alumina‐supported polytrifluoromethanesulfosiloxane
Author(s) -
Zhou DaQing,
Wang ChaoMing,
Yang JiHuo,
Huang MeiYu,
Jiang YingYan
Publication year - 2002
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.169
Subject(s) - friedel–crafts reaction , benzene , catalysis , molar ratio , benzyl chloride , yield (engineering) , chloride , superacid , nuclear chemistry , materials science , acid strength , organic chemistry , chemistry , composite material , zeolite
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 are 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 benzylation of benzene and substituted benzenes with benzyl chloride under relatively mild conditions. The yields could amount to 98 and 85%, respectively. The yield was influenced by catalyst concentration, reaction time and benzene/benzyl chloride molar ratios. The catalysts have considerable high stability and could be reused repeatedly without large changes in catalytic activity. Copyright © 2002 John Wiley & Sons, Ltd.

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