Sodium hydride → HCID 19360194, compound

Participants

Reaction Conditions

Reaction Steps

6-Chloro-3-(4-pyridinylamino)benzo[b]thiophene (4 g, 15 mmol) was added portionwise as a powder to a suspension of sodium hydride (60% oil dispersion, 0.7 g, 18 mmol, washed with heptane) in 50 mL of dimethylformamide. After the anion formation was completed, 1-[4-(3-chloropropoxy)-3-methoxyphenyl]ethanone (4 g, 16 mmol) was added. The reaction mixture was stirred two hours at 45° C., and then was poured into ice-water and extracted with ethyl acetate. The organic extract was washed with water and saturated sodium chloride solution, and then was dried (anhydrous magnesium sulfate), filtered and concentrated to 8 g of a dark oil. Elution through silica with 10% methanol in ethyl acetate via flash column chromatography afforded 4.1 g of a brown oil. Elution of this oil three times through silica with ethyl acetate via flash column chromatography afforded 3.0 g of a waxy solid. Recrystallization from acetonitrile afforded 2.1 g of white crystals, mp 148-149° C.

Provenance & Evidence