1: diethyl sulphone With lithium hexamethyldisilazane in tetrahydrofuran T=-20 - 20°C; Negishi coupling reaction; Inert atmosphere; 2: With zinc(II) chloride in tetrahydrofuran T=-20 - 20°C; Negishi coupling reaction; 1 h; Inert atmosphere; 3: bromobenzene With palladium diacetate; 2-(dicyclohexylphosphino)-2',4',6'-tri-i-propyl-1,1’-biphenyl in tetrahydrofuran T=65°C; Negishi coupling reaction; Degassed under vacuumInert atmosphere;

oxygen; rose bengal in benzene Oxidation; 0.166667 h; Irradiation;

sodium hydroxide