To a solution of 0.05 g (0.19 mMol) 7-cyclohexyl-4-methoxy-benzothiazol-2-ylamine in 2 ml THF were added 0.1 ml ethyl diisopropyl amine and 0.027 ml (0.23 mMol) 4-fluoro-benzoyl chloride. The reaction mixture was heated to 70° C. for 2 h. The solvent was evaporated to dryness, the residue taken up in dichloro methane and washed with water and brine. The organic phase was dried over sodium sulfate and evaporated to dryness in vacuo. The residue was subjected to column chromatography (ethyl acetate/hexane 1:9, 1:4) to yield 0.01 g (14%) of N-(7-cyclohexyl-4-methoxy-benzothiazol-2-yl)-4-fluoro-benzamide as a light yellow solid; F.p.: 192-195° C.
