Pseudopeptide fragments and local structures induced by an α-aminoxy acid in a dipeptide

Solvent-induced shifts in NMR spectrosco

Solvent-induced shifts in NMR spectroscopy by a combination of benzene and trifluoroacetic acid as an aid to the structure elucidation of isoflavones

✍ Hirday N. Jha; Virinder S. Parmar 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 233 KB

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