p-Toluenesulfonic acid → 2-methyl-1-[(S)-1-(tetrahydro-furan-2-yl)methyl]-5-(2-trifluoromethoxy-phenyl)-1H-pyrrole-3-carboxylic acid methyl ester

Participants

Reaction Steps

To a solution of 250 mg of 3-oxo-2-[2-oxo-2-(2-trifluoromethoxy-phenyl)-ethyl]-butyric acid methyl ester in methanol was added 84 μl of (S)-tetrahydrofurfurylamine and 5 mg of p-toluene sulfonic acid. The reaction mixture was then heated at reflux for 24 hours. After such time the reaction mixture was allowed to cool to room temperature before being concentrated in vacuo and purified by column chromatography to give 171 mg of the title compound; MS (EI) 383.1 (M)+.

Provenance & Evidence