Diethyl Sulfate → HCID 15342492, compound

Participants

Reaction Steps

A solution of 3-(4-pyridinylamino)thieno[2,3-b]pyridine (4 g) in 25 mL of dimethylformamide was added to an ice-cooled suspension of sodium hydride (60% oil dispersion, 0.8 g, washed with heptane) in 5 mL of dimethylformamide. After anion formation was completed a solution of diethyl sulfate (3 g) in 5 mL of dimethylformamide was added. After one hour the reaction mixture was poured into ice-water and extracted with ethyl acetate. The organic extract was washed with water and saturated sodium chloride, and then was dried (anhydrous magnesium sulfate), filtered and evaporated to 5 g of an oil. Elution through silica with 10% methanol in ethyl acetate via flash column chromatography afforded 2.1 g of a solid. Recrystallization from acetonitrile afforded 1.4 g of crystals, m.p. 123°-125° C.

Provenance & Evidence