Hydrochloric Acid → Ethyl 5-cyanomethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-2-carboxylate

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Reaction Steps

To a mixture of ethyl 5-(bromomethyl)-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-2-carboxylate (2000 mg, 6.31 mmol) in DMF (10 mL) was added sodium cyanide (649 mg, 13.2 mmol) at room temperature, and the mixture was stirred for 12 hr. The reaction mixture was acidified with 1N hydrochloric acid, and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was crystallized from ethyl acetate to give the title compound as a pale-brown powder (300 mg, 18%).

Provenance & Evidence