Trifluoroacetic acid → 4-(3,4-Dichloro-phenyl)-3-methyl-1-(3-piperidin-1-yl-propyl)-piperazin-2-one

Participants

Reaction Conditions

Reaction Steps

Trifluoroacetic acid (1.15 g, 10.1 mmol) was added to a solution of 2-(3,4-dichloro-phenylamino)-N-(2,2-dimethoxy-ethyl)-N-(3-piperidin-1-yl-propyl)-propionamide (300 mg, 0.67 mmol) in CH2Cl2 (6 mL) at 0° C. After 30 min the ice bath was removed, then after 1 h triethylsilane (391 mg, 3.36 mmol) was added. After 16 h the reaction mixture was cooled to 0° C. and treated with triethylamine, then after 15 min partitioned between CH2Cl2 and sat. aq. NaHCO3 solution. The organic layer was washed with brine, dried (MgSO4), and evaporated. Chromatography (IST Isolute® Flash NH2; EtOAc) afforded the title compound (184 mg, 71%). Yellow oil, MS: 384.2 (M+H)+.

Provenance & Evidence