Methanol → N-(3,5-bis-trifluoromethyl-benzyl)-N-methyl-6-piperazin-1-yl-4-o-tolyl-nicotinamide

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To a solution of 6.60 g (104 mmol) 4-{5-[(3,5-bis-trifluoromethyl-benzyl)-methyl-carbamoyl]-4-o-tolyl-pyridin-2-yl}-piperazine-1-carboxylic acid tert-butyl ester (Example 43) and 8.40 ml (207 mmol) methanol in 50 ml ethyl acetate 14.7 ml (207 mmol) acetyl chloride were added dropwise at 0° C. After 4 h the reaction mixture was diluted with ethyl acetate and treated with 1 N sodium hydroxide solution. The layers were separated and the aqueous layer extracted with dichloromethane. The combined organic layers were dried with sodium sulfate and concentrated to give 5.36 g of crude product. Flash column chromatography afforded 4.86 g (87.4%) of the title compound as a light brown solid.

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