期刊
LETTERS IN ORGANIC CHEMISTRY
卷 2, 期 1, 页码 51-53出版社
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1570178053400153
关键词
Electrophilic substitution Lewis acid catalysis; anhydrides; arenes; lanthanide triflates; lithium perchlorate
Cerium is the less rare rare earth; its salts are commercially available and inexpensive. However, screening of lanthanide triflates as Lewis acid catalysts in the Friedel-Crafts acylation of aromatics skipped cerium triflate. Now, catalytic Friedel-Crafts acylations of activated benzenes are performed by using cerium (III) triflate as catalyst. For less activated arenes, addition of lithium perchlorate as co-catalyst is required. In all cases aromatic ketones are obtained in very good yields.
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