1: 5-Bromo-2,4(1H,3H)-pyrimidinedione With chloro-trimethyl-silane; 1,1,1,3,3,3-hexamethyl-disilazane in 1,2-dichloro-ethane Inert atmosphereReflux; 2: methyl iodide With iodine in 1,2-dichloro-ethane 12 h; Inert atmosphereReflux;

bromine; potassium bromide T=60 - 70°C; 0.25 h;

bromine; potassium bromide in water T=30°C; var. conc., var. acidity conditions; MechanismRate constant;

in N,N-dimethyl-formamide Heating;