An attempt to prepare azirines by the base-catalyzed rearrangement of some quaternary hydrazones gave the corresponding azirine derivatives. Namely, 2-phenyl-3-methylazirine was obtained by the treatment of propiophenone dimethylhydrazone methiodide with potassium t-butoxide, but treatment with sodium isopropoxide gave 2, 5-diphenyl-3, 6- dimethylpyrazine or 2-phenyl-2-isopropoxy-3-methylaziridine, depending on the reaction ...
