Crossref journal-article
Oxford University Press (OUP)
Bulletin of the Chemical Society of Japan (286)
Abstract

Abstract Rare earth metal trifluoromethanesulfonates (rare earth metal triflates, RE(OTf)3) were found to be efficient catalysts for Friedel-Crafts acylation and alkylation. In the presence of a catalytic amount of RE(OTf)3, acylation of aromatic compounds having electron-donating substituents such as anisole, thioanisole, and mesitylene with acid anhydrides proceeded smoothly to afford the corresponding aromatic ketones in high yields. Although RE(OTf)3 alone is not effective for acylation of less reactive aromatics such as toluene, the combination of RE(OTf)3 and lithium perchlorate (LiClO4) enhanced the catalytic activity dramatically. Friedel-Crafts acylation reactions using rare earth metal perfluoroalkanesulfonates were also successfully performed in supercritical carbon dioxide (scCO2). Moreover, in the presence of a catalytic amount of RE(OTf)3, aromatic compounds reacted with benzyl chloride smoothly to afford the corresponding alkylation products in high yields. In these reactions, RE(OTf)3 could be easily recovered after the reactions were completed and could be reused without loss of activity.

Bibliography

Kawada, A., Mitamura, S., Matsuo, J., Tsuchiya, T., & Kobayashi, S. (2000). Friedel-Crafts Reactions Catalyzed by Rare Earth Metal Trifluoromethanesulfonates. Bulletin of the Chemical Society of Japan, 73(10), 2325–2333.

Authors 5
  1. Atsushi Kawada (first)
  2. Shuichi Mitamura (additional)
  3. Jun-ichi Matsuo (additional)
  4. Takehiro Tsuchiya (additional)
  5. Shu Kobayashi (additional)
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Dates
Type When
Created 22 years, 11 months ago (Sept. 6, 2002, 6:09 a.m.)
Deposited 1 year, 7 months ago (Jan. 20, 2024, 12:58 a.m.)
Indexed 1 month, 3 weeks ago (July 2, 2025, 2:11 p.m.)
Issued 24 years, 10 months ago (Oct. 1, 2000)
Published 24 years, 10 months ago (Oct. 1, 2000)
Published Online 23 years, 8 months ago (Dec. 27, 2001)
Published Print 24 years, 10 months ago (Oct. 1, 2000)
Funders 0

None

@article{Kawada_2000, title={Friedel-Crafts Reactions Catalyzed by Rare Earth Metal Trifluoromethanesulfonates}, volume={73}, ISSN={1348-0634}, url={http://dx.doi.org/10.1246/bcsj.73.2325}, DOI={10.1246/bcsj.73.2325}, number={10}, journal={Bulletin of the Chemical Society of Japan}, publisher={Oxford University Press (OUP)}, author={Kawada, Atsushi and Mitamura, Shuichi and Matsuo, Jun-ichi and Tsuchiya, Takehiro and Kobayashi, Shu}, year={2000}, month=oct, pages={2325–2333} }