p-Toluenesulfonic acid monohydrate → N-[3-(3,5-dimethoxy-4-hydroxyphenyl) 2-propenoyl]-N'-(3-benzhydroxypropyl)piperazine

Participants

Reaction Steps

To a solution of 270 mg (0.45 mmol) of the amide compound in 5 ml of methanol was added 95 mg (0.5 mmol) of p-toluen esulfonic acid monohydrate,,and the mixture was heated and refluxed for 1 hour under argon atmosphere. The reaction mixture was concentrated by evaporation under reduced pressure, a saturated aqueous solution of sodium hydrcgencarbonate was added to the residue, and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and concentrated by evaporation under reduced pressure. The residue was subjected tc silica gel column chromatography, eluted with chlcroform - methanol, to give 200 mg (0.38 mmol) of N-[3-(3,5-dimethoxy-4-hydroxyphenyl) 2-propenoyl]-N'-(3-benzhydroxypropyl)piperazine. Spectrophotometric data of the product support the structure shown below. ##STR93##

Provenance & Evidence