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NMR spectral studies: XIII—titanium tetrachloride-induced and lanthanide-induced shifts in the proton NMR spectra of β-lactams |
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| Authors: | Ajay K Bose M S Manhas P R Srinivasan H P S Chawla B Dayal D A Foley |
| 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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