Dichloromethane → {5-Chloro-6-[(3R)-3-methylpiperazin-1-yl]pyridin-3-yl}methanol

Participants

Reaction Steps

To a stirred solution of 4-(5-hydroxymethyl-3-trifluoromethyl-pyridin-2-yl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester from step (f) above (3.75 g, 10 mmol) in dichloromethane (10 mL) was added trifluoroacetic acid (10 mL, Aldrich) dropwise at 0° C. over a period of 10 min. The mixture was stirred at room temperature for 16 h and diluted with toluene (20 mL). The solvents were removed in vacuo and the residue was dissolved in EtOAc (100 mL), washed with saturated aqueous solution of NaHCO3 (2×30 mL) and brine (20 mL), dried over Na2SO4, and filtered. The solvent was evaporated in vacuo and the residue was purified by silica gel column chromatography, eluting with 90:10:1 mixture of MeOH/CH2Cl2/ammonium hydroxide to give the title compound as a white solid. MS (ESI, pos. ion) m/e: 276 (M+1).

Provenance & Evidence