triethylamine; trifluoroacetic anhydride in dichloromethane T=0 - 20°C; 2.08333 h;

1.1: Heating 2.1: tetrahydrofuran / -78 °C 2.2: AcOH / 20 °C 3.1: POCl3 / Heating View Scheme

1.1: tetrahydrofuran / -78 °C 1.2: AcOH / 20 °C 2.1: POCl3 / Heating View Scheme

1.1: ethanol / 4 h / 85 °C 2.1: Dowtherm™ A / 3 h / 250 °C 3.1: phosphorus tribromide / N,N-dimethyl-formamide / 1 h / 20 °C 4.1: sodium hydroxide / tetrahydrofuran / 0 - 20 °C 5.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 5.2: 2 h / 0 °C 6.1: triethylamine; trifluoroacetic anhydride / dichloromethane / 0 - 20 °C View Scheme

1.1: Dowtherm™ A / 3 h / 250 °C 2.1: phosphorus tribromide / N,N-dimethyl-formamide / 1 h / 20 °C 3.1: sodium hydroxide / tetrahydrofuran / 0 - 20 °C 4.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 4.2: 2 h / 0 °C 5.1: triethylamine; trifluoroacetic anhydride / dichloromethane / 0 - 20 °C View Scheme

1.1: phosphorus tribromide / N,N-dimethyl-formamide / 1 h / 20 °C 2.1: sodium hydroxide / tetrahydrofuran / 0 - 20 °C 3.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 3.2: 2 h / 0 °C 4.1: triethylamine; trifluoroacetic anhydride / dichloromethane / 0 - 20 °C View Scheme

1.1: sodium hydroxide / tetrahydrofuran / 0 - 20 °C 2.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 2.2: 2 h / 0 °C 3.1: triethylamine; trifluoroacetic anhydride / dichloromethane / 0 - 20 °C View Scheme

1.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 1.2: 2 h / 0 °C 2.1: triethylamine; trifluoroacetic anhydride / dichloromethane / 0 - 20 °C View Scheme

trichlorophosphate Heating;