Studies on diazepines. XXII. Synthesis of monocyclic 1,4-dihetero seven-membered ring compounds using thermal valence bond isomerization of tricyclo(4.1.0.02.5)heptane systems.
Studies on diazepines. XXII. Synthesis of monocyclic 1,4-dihetero seven-membered ring compounds using thermal valence bond isomerization of tricyclo(4.1.0.02.5)heptane systems.
Heating the 3-azatricyclo[4.1.0.02,5]heptanes (2) prepared from pyridine via 2-azabicyclo[2.2.0]hex-5-enes (1) results in ring opening to give the corresponding 1,4-diheteroseven-memberedringcompounds (3).