Thermal isomerization of 4-amino-3-vinylpyridines: Synthesis of fused 1,6-naphthyridines and unexpected new tert -amino effect cyclization to azepines

1. Ojea, V.
2. Muinelo, I.
3. Figueroa, M.C.
4. Ruiz, M.
5. Quintela, J.M.