Dimethylformamide → Water TFA acetonitrile

Participants

Reaction Steps

12 mg of 2-Methoxy-5-[3-(methoxycarbonyl)phenyl]benzoic acid and 9 mg of 4-trifluoromethylbenzylamine were dissolved in 0.2 ml of N,N-dimethylformamide, 9 ml of diethyl cyanophosphonate and 50 ml of triethylamine were added thereto, and the mixture was stirred at room temperature for 1 hour. Ethyl acetate was added to the reaction mixture which was then washed with water. The organic layer was evaporated, and the residue was dissolved in 0.4 ml of ethanol. 0.1 ml of 5N sodium hydroxide was added thereto, and the mixture was stirred at room temperature for 1 hour. 1 N hydrochloric acid was added to the reaction mixture which was then extracted with ethyl acetate. The organic layer was evaporated, and the residue was purified by HPLC using a reverse phase system column and a water-acetonitrile-trifluoroacetic acid eluent, to give the title compound.

Provenance & Evidence