potassium carbonate in N,N-dimethyl-formamide T=20°C; 4 h;

1: 6-mercaptopurine With potassium carbonate in N,N-dimethyl-formamide T=25°C; 0.25 h; Inert atmosphere; 2: bromo-di-phenylmethane in N,N-dimethyl-formamide T=25°C; 4 h; Inert atmosphere;