Under an argon atmosphere 2.8 mL (4.5 mmol) of a 1.6 M n-butyllithium solution were added to a mixture of 1.2 g (4.0 mmol) 2-benzyloxy-5-bromo-1,3-dimethyl-benzene in mL THF cooled to −75° C. and the mixture was stirred for 1 h at −75° C. Then 0.96 g (4.3 mmol) 6-chloro-pyrimidine-4-carboxylic acidmethoxy-methyl-amide, dissolved in 10 mL THF, were added dropwise. After another 30 min stirring at −75° C. the reaction mixture was slowly heated to 0° C. The mixture was combined with saturated sodium hydrogen carbonate solution and extracted with diethyl ether. The organic phase was dried and evaporated down. The residue was purified by flash chromatography.
