1: in diethyl ether T=20°C; 1 h; 2: With water; 2,3-dicyano-5,6-dichloro-p-benzoquinone in tetrahydrofuran; diethyl ether T=20°C; 16 h;

toluene-4-sulfonic acid hydrazide in chloroform 12 h; Heating;

1: With potassium acetate; 4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl-4',4',5',5'-tetramethyl-1,3,2-dioxaborolane; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct in dimethyl sulfoxide T=90°C; Inert atmosphere; 2: With water in dimethyl sulfoxide T=20°C;

1: 20 percent / MoO3, 30percent H2O2 / acetic acid / 16 h / 40 °C 2: 72 percent / Et3N / acetonitrile / 4 h / Ambient temperature View Scheme

dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine; potassium phosphate; palladium diacetate in toluene T=90°C; Suzuki-Miyaura cross-coupling reaction; 8 h; Inert atmosphere; regioselective reaction;