Triethylamine → HCID 18376783, compound

Participants

Reaction Steps

To a solution of 2-methoxycarbonyl-3-chloro-4-hydroxymethylthiophene (6 g, 29 mmol) in methylene chloride (100 mL) were added triethylamine (8.1 mL, 58 mmol) and methanesulfonyl chloride (2.5 mL, 32 mmol) at ambient temperature. After stirring for 6 hours, the reaction mixture was concentrated to afford 2-methoxycarbonyl-3-chloro-4-(methylsulfonyloxy)methylthiophene. The crude product was dissolved in DMF (150 mL) and excess potassium cyanide was added to the solution. The reaction mixture was stirred at ambient temperature for 16 hours, then poured into water, and extracted with methylene chloride. The combined extracts were dried over Na2SO4, filtered, and concentrated in vacuo to afford 2-methoxycarbonyl-3-chloro-4-cyanomethylthiophene.

Provenance & Evidence