7-methoxy-1-benzothiophene-2-carboxylic acid methyl ester
To a solution of 600 mg (3.31 mmol) of 3-methoxy-2-nitrobenzaldehyde in 8 ml of DMF 550 mg (3.97 mmol) of potassium carbonate and 350 mg (3.31 mmol)
Mercaptoacetate added. The reaction mixture is heated for 4 h at 70 ° C. After cooling water is added. The resulting precipitate is filtered, washed with water and dried in vacuo. Obtained 387 mg (45.7% of theory) of the title compound.
1H NMR (200 MHz, DMSO-d 6): δ = 8.21 (s, IH), 7.63 (d, IH), 7.46 (dd, IH), 7.11 (d, IH),
3.98 (s, 3H),
3.89 (s, 3H) ppm.
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