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INTERMEDIATE 344-[2-(4-Fluoropheny1H3-oxazol-4-yl]piperidineA solution of 4-fluorobenzamide (4.54 g, 32.7 mmol) and /-butyl 4-(bromoacetyl)-piperidine-1- carboxylate (5.0 g, 16.3 mmol) in DMF (40 mL) was heated at 145°C for 16 h. Upon completion of the reaction, the solution was allowed to cool to rt and concentrated to a dark oil. The oil was purified by reverse phase HPLC to afford the title compound (760 mg). LC/MS: m/e 247.08 (M+H).div..
In N,N-dimethyl-formamide; at 145℃; for 16h;
A solution of 4-fluorobenzamide (4.54 g, 32.7 mmol) and t-butyl 4-(bromoacetyl)-piperidine-1-carboxylate (5.0 g, 16.3 mmol) in DMF (40 mL) was heated at 145'C for 16 h. Upon completion of the reaction, the solution was allowed to cool to rt and concentrated to a dark oil. The oil was purified by reverse phase HPLC to afford the title compound (760 mg). LC/MS: m/e 247.08 (M+14)+.