Formic Acid → HCID 11323177, compound

Participants

Reaction Conditions

Reaction Steps

To a stirring solution of (±)-1,3,4,10b-tetrahydro-7-trifluoromethyl-pyrazino[2,1-a]isoindol-6(2H)-one (60 mg, 0.23 mmol) in water (1 mL) was added formic acid (0.22 mL, 5.9 mmol) and formaldehyde (190 mg, 2.3 mmol; 37% sol. in water). The reaction flask was sealed with a rubber septum (no nitrogen inlet) and warmed to 60° C. The reaction was maintained at this temperature for 24 h and was then cooled. The reaction was then diluted with saturated aqueous sodium bicarbonate, washed with ethyl acetate (3×50 mL), and the combined organic layers were dried over sodium sulfate, filtered, an concentrated. The resulting residue was purified by radial chromatography (2% ammonium hydroxide in 8% methanol in dichloromethane) to afford the desired product (33 mg, 52%) as a pale yellow residue. MS (ESI) 271.6 (M+H).

Provenance & Evidence