Trifluoroacetic acid → [6-Amino-3-methyl-5-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-(4-pyrrolidin-1-yl-piperidin-1-yl)-methanone

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Reaction Steps

To a solution of 1.48 g (2.7 mmol) of [6-(4-methoxy-benzylamino)-3-methyl-5-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-(4-pyrrolidin-1-yl-piperidin-1-yl)-methanone (example 6) in 75 ml of CH2Cl2 was added 12.2 ml=18.2 g (160 mmol) of trifluoroacetic acid and the reaction mixture was subsequently heated up to reflux. After two hours, it was poured into crashed ice, the pH was adjusted to 8-9 with sodium carbonate solution and it was extracted twice with CH2Cl2; the organic phases were washed with water, dried over magnesium sulfate, filtered and evaporated. The residue was purified by flash column chromatography (CH2Cl2/MeOH 98:2 to 3:1) to give 1.04 g (90%) of the title compound as light yellow foam. MS: 433.3 (MH+).

Provenance & Evidence