1.1: acetic anhydride; potassium acetate; acetic acid / chloroform / 0.25 h / 20 °C 1.2: 40 - 60 °C 1.3: 0 - 20 °C 2.1: triethylamine / 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl; palladium dichloride / acetonitrile / 18 h / 100 °C / 15001.5 Torr View Scheme

1: With potassium acetate; acetic anhydride; acetic acid in chloroform T=20°C; 0.25 h; 2: With isopentyl nitrite in chloroform T=40 - 60°C; 3: With sodium hydroxide in methanol; water T=0 - 20°C;

1.1: acetic anhydride; potassium acetate; acetic acid / chloroform / 0.25 h / 20 °C 1.2: 40 - 60 °C 1.3: 0 - 20 °C 2.1: triethylamine / 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl; palladium dichloride / acetonitrile / 18 h / 100 °C / 15001.5 Torr 3.1: sodium hydroxide; water / methanol / 0 - 20 °C 3.2: pH 5 - 6 View Scheme

1: acetic anhydride; potassium acetate; acetic acid; isopentyl nitrite / toluene / 3 h / Reflux 2: potassium carbonate; methanol / 1 h / Reflux 3: N-ethyl-N,N-diisopropylamine / bis(benzonitrile)palladium(II) dichloride; 1,1'-bis-(diphenylphosphino)ferrocene / 4 h / 135 °C / 11251.1 Torr View Scheme