Ethyl Acetate → Methyl 5-fluoro-1-benzothiophene-2-carboxylate

Beteiligte Stoffe

Reaktionsschritte

TEA (3.705 g, 36.619 mmol) was added to a solution of methyl 2-mercaptoacetate (3.293 g, 30.985 mmol) in CH3CN (12.5 mL). This was followed by the addition of 2,5-difluorobenzaldehyde (4 g, 28.169 mmol) in CH3CN (12.5 mL) and the resulting reaction mass was refluxed overnight under nitrogen atmosphere. The reaction was monitored by TLC (5% ethyl acetate in hexane). The reaction mass was concentrated under reduced pressure to obtain the crude product. Purification by column chromatography on silica gel (15% ethyl acetate in hexane) afforded 2 g of the product (33.89% yield).

Herkunft & Nachweise