Sulfuric Acid → HCID 19026184, compound

Participants

Reaction Steps

Conc sulfuric acid (70 ml) was added dropwise over 45 mins to a solution of 5,6,7,8-tetrahydro-5-hydroxy-5-methyl-2-(phenylmethoxy)quinoline (14.0 g) and acetonitrile (200 ml) at 0° C. The solution was stirred at room temperature for 18 hrs, poured over ice, and basified to pH 8 with 50% sodium hydroxide solution. The aqueous phase was extracted with ethyl acetate, and the combined organic layers were washed with brine, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated. The residue was purified by chromatography (silica gel, elution with ethyl acetate). The appropriate fractions were collected and evaporated. Recrystallization (twice) of the residue from ethyl acetate/hexanes gave 2.60 g(16%) of product, mp 153°-154° C.

Provenance & Evidence