1: With palladium diacetate; potassium carbonate; 2-(dicyclohexylphosphino)-2',4',6'-tri-i-propyl-1,1’-biphenyl in N,N-dimethyl acetamide T=80°C; 2 h; Inert atmosphere; 2: With toluene-4-sulfonic acid in dichloromethane T=20°C; 2 h; Inert atmosphere;