Synthesis of heterocyclic compounds; Xlregioselective synthesis of 4-substituted 2-amino-5-cyano-6-methoxy-3-benzenesulfonylpyridines

1. Fuentes, L.
2. Vaquero, J.J.
3. Ardid, M.I.
4. Del Castillo, J.C.
5. Soto, J.L.