1: tert-butyl 5-methyl-2,4-dioxo-pyrimidine-1-carboxylate With sodium hydride in N,N-dimethyl-formamide T=0°C; 0.5 h; 2: benzyl bromide in N,N-dimethyl-formamide T=0 - 20°C; 0.5 h;

1.1: NaH / dimethylformamide / 0.5 h / 0 °C 1.2: 84 percent / dimethylformamide / 0.5 h / 0 - 20 °C 2.1: 94 percent / K2CO3 / methanol / 2 h / 20 °C View Scheme