1: 3-methyl-butan-2-one; 4-fluorobenzoic acid ethyl ester With potassium tert-butylate in toluene T=-9 - 10°C; 2: urea With hydrogenchloride in isopropyl alcohol; toluene T=60 - 80°C; 160.5 h; 3: With sodium hydrogencarbonate in water pH=7; Product distribution / selectivity;

hydrogenchloride in ethanol; isopropyl alcohol 40 h; Heating / reflux; Product distribution / selectivity;

N-bromosuccinmide in N,N-dimethyl-formamide T=-8.5 - 20°C; 4.16667 h;