The conformational analysis of saturated heterocycles. Part 72. Tetrahydro-1,3,4-oxadiazines

Abstract
Variable-temperature proton n.m.r. spectroscopy has been used to study the inversion barriers and conformations of 3.4-dialkyltetrahydro-1.3.4-oxadiazines. The predominant conformer of 3,4-dimethyltetrahydro-1.3,4-oxadiazine was found to be 3ax, 4eq.

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