1.1: methanesulfonyl chloride / toluene / 1.5 h / 5 - 10 °C 1.2: 6 h / 5 - 70 °C 2.1: benzenesulfonic Acid / 5.5 h / 120 °C 3.1: sodium acetate / water / 4 h / 110 - 116 °C 4.1: hydrogenchloride / water; ethanol / 13 - 25 °C 5.1: trifluoroacetic acid / 1.5 h / 50 °C 6.1: N,N'-dimethyl-barbituric acid; triphenylphosphine; palladium diacetate / ethanol / 2 h / 35 °C / |Sealed tube; |Inert atmosphere View Scheme

1.1: methanesulfonyl chloride / toluene / 1.5 h / 5 - 10 °C 1.2: 6 h / 5 - 70 °C 2.1: benzenesulfonic Acid / 5.5 h / 120 °C 3.1: sodium acetate / water / 4 h / 110 - 116 °C 4.1: hydrogenchloride / water; ethanol / 13 - 25 °C 5.1: trifluoroacetic acid / 1.5 h / 50 °C 6.1: N,N'-dimethyl-barbituric acid; triphenylphosphine; palladium diacetate / ethanol / 2 h / 35 °C / |Sealed tube; |Inert atmosphere 7.1: phosphoric acid / ethanol / 50 °C View Scheme