
doi: 10.1007/bf00503343
The conformation of a number of 1,2,3,4-tetrahydro-2-pyrimidinones with various substituents in the ring was established on the basis of the vicinal 3J34 constants found from the 1H NMR spectra of these compounds. It is shown that in solution rapid conformational transformations between the two possible “boat” conformations evidently occur.
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