Dimethylformamide → 5-(4-Hydroxy-phenylsulfanyl)-4-nitro-thiophene-2-carboxylic acid (3-bromo-phenyl)-amide

Participants

Reaction Steps

The product from Example 351C was dissolved in dichloromethane followed by the addition of a solution of oxalyl chloride and a catalytic amount of dimethylformamide. The solution was stirred at room temperature for 3 hours followed by the addition of 3-bromoaniline and pyridine. The resultant solution was stirred at room temperature for 20 hours followed by the addition of water and extraction of the solution with ethyl acetate, the organic extracts dried and concentrated under vacuum to provide the crude product, which was purified by silica gel chromatograpy to provide the title product.

Provenance & Evidence