M. Dumic et al., CHEMISTRY OF 1,3-DIOXEPINS .6. 6A-TETRAHYDRO-1H,4H-[1,3]-DIOXEPINO[5,6-B]AZIRINES - A NOVEL CLASS OF FUSED DIOXEPINS, POTENT HYPOGLYCEMIC AGENTS, Tetrahedron letters, 34(22), 1993, pp. 3639-3642
The new hypoglycemics, 1-sulfonyl-dioxepinoazirines 2, derived from a
novel heterocyclic system, 6a-tetrahydro-1H,4H-[1,3]-dioxepino[5,6-b]a
zirine, have been synthesized starting from trans-6-acetylamino-5-chlo
ro-1,3-dioxepanes 7 via azirines 3. Their structure has been confirmed
by the single crystal X-ray diffraction of 1-(4-acetylaminobenzenesul
fonyl) derivative 2b.