potassium carbonate in acetonitrile Heating;

1.1: Et3N / CH2Cl2 / 0 °C 2.1: K2CO3 / acetonitrile / 80 °C 2.2: 36 percent / acetonitrile / 24 h View Scheme

caesium carbonate in tetrahydrofuran Reflux;

potassium carbonate in acetonitrile

1: N,N-dimethyl-formamide With trichlorophosphate T=0°C; Vilsmeier-Haack type reaction; 0.5 h; Inert atmosphere; 2: 10-phenyl-1,4-dioxa-7,13-dithia-10-aza-cyclopentadecane T=80°C; Vilsmeier-Haack type reaction; 3 h; Inert atmosphere; 3: With water T=20°C; Vilsmeier-Haack type reaction; Cooling with iceInert atmosphere;