Abstract
The prototropic transformation of O-(N′-methylcarbamidomethyl)-N-carboisopropoxy-N-phenylhydroxylamine in the presence of sodium ethoxide to form isopropyl phenylcarbamate, N-phenyl-N′-methylurea, and glyoxylic acid derivatives was studied. A similar reaction with 2-phenyl-4-methyl-1,2,4-oxadiazine-3,5-dione is accompanied by ring contraction and the formation of 1-phenyl-3-methyl-5-hydroxyhydantoin.
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