A Novel Intramolecular Palladium-MediatedCyclization for the Synthesis of Substituted 2-(Aryl- or Benzylamino)-4H-1,3-Benzothiazines

Synthesis of 2-aryl/benzylamino 4H-1,3-benzothiazine derivatives was achieved via an unprecedented intramolecular palladium cyclization for creating a sulfur-aryl bond.