Sodium Carbonate → 6-Nitro-4'-[3-(propane-2-sulfonylamino)-thiophen-2-yl]-biphenyl-2-carboxylic acid methyl ester

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Reaction Steps

Heat the mixture of propane-2-sulfonic acid {2-[4-{4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-thiophen-3-yl}-amide(662 mg, 1.65 mmol), 2-bromo-3-nitro-benzoic acid methyl ester (390 mg, 1.5 mmol), Na2CO3(2M, 2.2 mL, 4.5 mmol) and Pd(PPh3)4 (260 mg, 0.26 mmol) and 15 ml of 1,4 dioxane under N2 to 80° C. overnight. After cooling to room temperature, dilute with diethyl ether (200 mL). Wash with water, saturated aq. sodium chloride, and dry over MgSO4. Remove solvent and purify by flash chromatography (Silica gel-hexane/EtOAc) to provide 6-nitro-4′-[3-(propane-2-sulfonylamino)-thiophen-2-yl]-biphenyl-2-carboxylic acid methyl ester (250 mg). MS (m/e): 478.7(M+1).

Provenance & Evidence