反应详情

4-(5-Formyl-3-trifluoromethyl-pyridin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester from step (c) above (1.44 g, 4.0 mmol) reacted with NaBH4 (180 mg, 4.8 mmol, Aldrich) under the conditions of Example 183f to give the title compound as a gum. MS (ESI, pos. ion) m/e: 262 (M−Bu+1).