To a stirring DMF solution (6 mL) containing 5-bromo-4-chloro-2-hydroxy-N-(2-methoxy-phenyl)-N-methyl-benzamide (300 mg, 0.81 mmol) was added 4-bromo-butyronitrile (0.096 mL, 0.97 mmol) and K2CO3 (223 mg, 1.62 mmol). The mixture was heated at 50° C. for 8 hrs. Additional 0.5 eq. of 4-bromobutyronitrile and 0.5 eq of K2CO3 were added and the mixture was heated for another 8 hrs. The mixture was diluted with dichloromethane, washed with brine, dried over Na2SO4, filtered and concentrated. The residue was purified via silica gel flash column chromatography to afford 5-bromo-4-chloro-2-(3-cyano-propoxy)-N-(2-methoxy-phenyl)-N-methyl-benzamide (241 mg). MS [M+H]+: 439.1; tR=2.62 min (method 1)
