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Communication | Special issue | Vol 69, No. 1, 2006, pp.119-122
Published online, 27th October, 2006
DOI: 10.3987/COM-06-S(O)48
Reaction of 2H-Cyclohepta[b]furan-2-ones with Pyridinium Salts of Trifluoromethanesulfonic Anhydride

Noboru Morita,* Tomohiro Matsuki, Masashi Nakashima, Taku Shoji, Kozo Toyota, Shigeru Kikuchi, and Shunji Ito

*Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan


2H-Cyclohepta[b]furan-2-one (1) reacted with TPT, electrophilically to give 3-dihydropyridinyl-2H-cyclohepta[b]furan-2-one and subsequent treatment with sodium hydroxide in ethanol gave 3-(4-pyridinyl)-2H-cyclohepta[b]furan- 2-one in excellent yields. Furthermore, it reacted with methyl iodide give a corresponding pyridinium salt easily.