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Solvent-induced chemical shifts of methoxyl nuclear resonance signals in chalcones by benzene and trifluoroacetic acid

✍ Scribed by Shashi K. Khurana; V. Krishnamoorthy; Virinder S. Parmar

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 163 KB
Volume: 38
Category: Article
ISSN: 1386-1425
DOI: 10.1016/0584-8539(82)80132-3

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We have observed that the benzene-induced solvent shifts ofcertain methoxyl groups in the NMR spectra of isoflavones are appreciably changed by the addition of a small amount of trifluoroacetic acid to the solution of the isoflavones in a 1: 1 mixture of chloroform and benzene. The methoxyl group at