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NMR spectral studies: XIII—titanium tetrachloride-induced and lanthanide-induced shifts in the proton NMR spectra of β-lactams

✍ Scribed by Ajay K. Bose; M. S. Manhas; P. R. Srinivasan; H. P. S. Chawla; B. Dayal; D. A. Foley

Publisher: John Wiley and Sons
Year: 1976
Tongue: English
Weight: 383 KB
Volume: 8
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270080310

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✦ Synopsis

Abstract

2‐Azetidinones which carry a proton each on C‐3 and C‐4 often pose a problem in the correct assignment of the resonances due to these protons; titanium tetrachloride has been shown to be an effective and reliable n.m.r. shift reagent to differentiate between these two protons on the basis of their different sensitivities to this reagent. A few compounds were also studied with Eu(fod)~3~ and Pr(fod)~3~ for the sake of confirmation.

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