Methanol → 5-(4-Chlorophenyl)-2-piperidin-4-ylpyrimidine

Beteiligte Stoffe

Reaktionsschritte

1-Chloroethyl chloroformate (0.50 ml) was added to a solution of 5-(4-chlorophenyl)-2-(1-methylpiperidin-4-yl)pyrimidine (0.170 g) in anhydrous 1,2-dichloroethane (10 ml) and the mixture heated to reflux, under a calcium chloride guard tube, for 20 h. The reaction was then cooled, treated with methanol (1.0 ml), and returned to reflux for a further hour. After cooling, the reaction was diluted with diethyl ether (20 ml) and extracted with water (20 ml), 0.2 M hydrochloric acid (10 ml) then 1% citric acid (50 ml). The combined aqueous extracts were back-extracted with diethyl ether (10 ml), basified to pH 13 with 46% aqueous sodium hydroxide and extracted with ethyl acetate (20 ml, then 2×10 ml). The combined ethyl acetate extracts were washed with water (10 ml), saturated brine (20 ml), dried (Na2SO4) and evaporated under reduced pressure to give the title compound as a white solid (0.123 g, 76%).

Herkunft & Nachweise