Hydrochloric Acid → 908117-05-5

Participants

Reaction Steps

A mixture of 5.55 g of sodium and 26.9 mL of 2-dimethylaminoethanol in tetrahydrofuran (180 mL) is heated to reflux for 20 hours. The reaction mixture is cooled to room temperature, treated with 4 g of 4-amino-2-chloropyridine and heated to 140° C. for 20 min (microwave irradiation). The reaction mixture is treated with concentrated HCl to pH 8 at 0° C., saturated with sodium chloride and extracted with diethyl ether. The organics are dried (magnesium sulfate) and concentrated to 11.9 g of crude product which is purified by silica gel chromatography (90:10:1 ethyl acetate/methanol/ammonium hydroxide) to give 2-(2-dimethylamino-ethoxy)-pyridin-4-ylamine as tan crystals. MS (m/z): 182 (M+1); Rf 0.1 (90:10:1 ethyl acetate/methanol/ammonium hydroxide).

Provenance & Evidence