Hydrochloric Acid → (R)-1-(2-Methoxyphenyl)-4-[2-(methyl)-2-(2-pyridinylamino)ethyl]piperazine

Participants

Reaction Conditions

Reaction Steps

9.16 grams (46.6 millimoles) of 1-(2-methoxyphenyl)piperazine in one portion was added under argon to a solution of 10 grams (46.6 millimoles) of (R)-4-methyl-3-pyridin-2-yl[1,2,3]oxathiazolidine-2,2-dioxide in 200 millilitres of acetonitrile. The mixture became yellow. After ½ hour, the reaction mixture was heated to 50° C. for 1 hour and then stirred at room temperature overnight. Then dilute hydrochloric acid was added. The mixture was washed with ethyl acetate, basified to pH 12 and extracted twice with ethyl acetate. The organic phases were washed with brine, dried (Mg SO4) and subjected to evaporation to give 12.053 grams of the title compound which was purified by columning in the system ethyl ether/hexane (1:1) Al2O3 to afford 9.96 grams of the title compound.

Provenance & Evidence