Phentermine → N-(alpha,alpha-Dimethylphenethyl)-2-quinoxalinecarboxamide

Participants

Reaction Conditions

Reaction Steps

2-Quinoxaloyl chloride (207 mg, 1.07 mmol) in dichloromethane (1 mL) was added to a solution of phentermine (160 mg, 1.07 mmol) in dichloromethane (3 mL) cooled to 0° C. The reaction was allowed to warm to 25° C. After 5 min, the reaction mixture was diluted with ethyl acetate (40 mL) and washed with 1 M sodium hydroxide (2×40 mL). The organic layer was dried (anhydrous magnesium sulfate), filtered through silica gel, and rotary evaporated. This provided 51 mg (16%) of (108):

Provenance & Evidence