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Figure 4
1H NMR spectra of 1 in CDCl3 (upper) and 2 in DMSO-d6 (lower) at ambient temperature. The signal for the NH proton of 1 is not detectable due to exchange with the solvent deuterium. |
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Figure 4
1H NMR spectra of 1 in CDCl3 (upper) and 2 in DMSO-d6 (lower) at ambient temperature. The signal for the NH proton of 1 is not detectable due to exchange with the solvent deuterium. |