triethylamine

ammonium hydroxide

thionyl chloride; N,N-dimethyl-formamide T=20°C; 0.0833333 h; Reflux;

thionyl chloride in dichloromethane

1.1: toluene-4-sulfonic acid / toluene / 2 h / 118 - 120 °C / |Dean-Stark; |Microwave irradiation 2.1: n-butyllithium / hexane; tetrahydrofuran / -78 - -50 °C / |Inert atmosphere 2.2: -78 - 20 °C / |Inert atmosphere 3.1: sulfuryl dichloride / hexane / 0.67 h / -5 - 0 °C 4.1: sulfuric acid / chloroform / 30 h / 20 °C View Scheme

1.1: n-butyllithium / hexane; tetrahydrofuran / -78 - -50 °C / |Inert atmosphere 1.2: -78 - 20 °C / |Inert atmosphere 2.1: sulfuryl dichloride / hexane / 0.67 h / -5 - 0 °C 3.1: sulfuric acid / chloroform / 30 h / 20 °C View Scheme

thionyl chloride in N,N-dimethyl-formamide 0.05 h; Heating;