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Communication | Special issue | Vol 5, No. 1, 1976, pp.195-202
Published online, 1st January, 1970
DOI: 10.3987/S-1976-01-0195
1H NMR Solvet Sifts Induced by Hexafluorobenzene in Lactones, Lactams, Acid Anhydrides and Imides

Isao Horibe, Hiroko Shigemoto, and Kazuo Tori*

*Shionogi Research Laboratories, Shionogi & Co. Ltd., Fukushima-ku, Osaka 553-0002, Japan


Aromatic solvent-induced shifts (ASIS) with hexafluorobenzene in 60-MHz 1H nmr spectra of lactones including sesquiterpenic ones, lactams, carboxylic acid anhydrides and imides were examined to demonstrate that the ASIS method becomes more useful in signal assignments and structure elucidation of lactones and lactams when hexafluorobenzene is employed as a solvent rather than benzene or pyridine.