Pyridine → Methyl 3-[2,6-dichloro-4-(trifluoromethyl)phenylsulfonamido]thiophene-2-carboxylate

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Reaction Steps

Synthesized as described for 3 using 2,6-dichloro-4-(trifluoromethyl)benzene-1-sulfonyl chloride (2.5 g; 7.97 mmol), methyl 3-aminothiophene-2-carboxylate (1.14 g; 7.25 mmol), 4-dimethylaminopyridine (221.4 mg; 1.81 mmol), pyridine (11.81 mL; 145.0 mmol) and anhydrous dichloromethane (50 mL). Purification by automated silica gel chromatography (Biotage®) eluting with ethyl acetate/hexanes (0 to 30% v/v over 400 mL gradient elution) afforded the title compound as a white solid (2.20 g).

Provenance & Evidence