Sodium Carbonate → Ethyl cis(+/-)-2-(4-{[(4-Chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-(dimethylamino)piperidin-1-yl)-4-methyl-1,3-thiazole-5-carboxylate

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The same operation as in Example (196c) was performed using tert-butyl cis(±)-4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-(dimethylamino)-piperidine-1-carboxylate obtained in Example (200d) (104 mg, 0.260 mmol), 4 N hydrochloric acid/1,4-dioxane (2 mL), ethyl 2-bromo-4-methyl-1,3-thiazole-5-carboxylate (71.6 mg, 0.286 mmol) and sodium carbonate (551 mg, 5.20 mmol), to obtain 110 mg of the title compound (90%) as a pale yellow solid.

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