sodium carbonate; 1-butylpyridinium tetrafluoroborate T=20°C; Chichibabin cyclocondensation; 3 h;

potassium carbonate in chloroform 2 h; Heating;

1: 1-fluoro-4-acetyl-benzene With (hydroxy(tosyloxy)iodo)benzene; 1-butylpyridinium tetrafluoroborate Heating; 2: 2-amino-pyrimidine With sodium carbonate; 1-butylpyridinium tetrafluoroborate T=20°C;

1: acetonitrile / Heating 2: 59 percent / acetonitrile / 6 h / Heating View Scheme

in acetonitrile 6 h; Heating;