Functionalised C-azido-hydrazones (1) were prepared by treating the corresponding chloro-hydrazones (2) with sodium azide under phase-transfer conditions. Treatment of the hydrazones (1) with boiling benzene afforded 3,4,4a,5-tetrahydro[1,2,4]triazino[6,1-c][1,4]benzoxazines (3). Mechanisms are discussed.
L. Bruché, L. Garanti and G. Zecchi, J. Chem. Soc., Perkin Trans. 1, 1982, 755 DOI: 10.1039/P19820000755
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