To a solution of 2-[(1-methylethyl)oxy]-5-[3-(2,3,4,5-tetrahydro-1,4-benzoxazepin-9-yl)-1,2,4-oxadiazol-5-yl]benzonitrile (Example 32) (100 mg, 0.204 mmol) in acetonitrile (10 ml) was added N,N-diisopropylethylamine (0.07 ml, 0.408 mmol) and ethyl 5-bromopentanoate (0.06 mL, 0.408 mmol). The reaction mixture was heated to 80° C. overnight then was allowed to cool and the solvent evaporated. Purification of the residue by flash chromatography, eluting with (40-100% ethyl acetate in cyclohexane) gave the title compound as an off white solid (70 mg).
