Formula 205 where T is a covalent bond; W, X, Y and Z are —C═; U—V is —N(R6)—CReRf—CRgRh—; R1, R2, R4 and Ra to Rh are H; Rand R6 is p-methyl-benzoyl: A mixture of the compound of Formula 203 (2.66 g, 6.7 mmol), 1M NaOH (27 mL), methanol (54 mL), and dioxane (36 mL) was stirred at room temperature for 7 hours. The solvents were evaporated and the residue portioned between dichloromethane (75 mL), saturated NaCl (50 mL), and concentrated HCl (3 mL). The layers were separated and the organic layer dried over MgSO4 and concentrated under vacuum to give the corresponding compound of Formula 204, 4-chloro-2-[1-(4-methyl-benzoyl)-piperidine-2-carbonyl]amino}-benzoic acid, which was carried forward without further purification. This crude product was redissolved in dichloromethane and treated with EDC (3.84 g, 20 mmol), and diisopropylethylamine (3.50 mL, 20 mmol). After stirring 20 minutes, benzylamine (2.20 mL, 20 mmol) was added and the mixture stirred overnight at room temperature. The mixture was washed with water (2×50 mL) and 1M HCl, dried over MgSO4, filtered and concentrated under vacuum to give 1.5 g (47% yield) of the desired product of Formula 205, 1-(4-methyl-benzoyl)-piperidine-2-carboxylic acid (2-benzylcarbamoyl-5-chloro-phenyl-amide, a crude product that was found to be 80% pure by reverse phase HPLC. The product was taken on without further purification. LRMS (MH+) m/z 491.
