Ethanol → 4-(5-(4-chlorophenyl)-1-ethyl-4-methyl-2-propionyl-1H-pyrrol-3-yl)benzene sulfonamide

Participants

Reaction Conditions

Reaction Steps

To the solution of 1-(3-bromo-5-(4-chlorophenyl)-1-ethyl-4-methyl-1H-pyrrol-2-yl)propan-1-one (compound 51c, 0.5 g, 1.41 mmol) in a mixture of toluene: ethanol (3:12 ml) was added 4-aminosulfonylbenzene boronic acid (0.34 g, 1.69 mmol) and potassium carbonate (0.48 g, 3.52 mmol) at a temperature of about 25° C. in a sealed tube and a nitrogen gas was bubbled through the reaction mixture for 15 minutes. To the reaction mixture was then added tetrakis(triphenylphosphine)palladium(0) (0.16 g, 0.14 mmol) under nitrogen atmosphere and the reaction mixture was heated at about 90° C. to 95° C. for 18 hr under stirring. The progress of the reaction was monitored by TLC. The reaction mixture was then cooled to 25° C. and filtered through celite. The celite cake was washed with 10% methanol in dichloromethane (2×20 ml). The combined filtrate was concentrated under reduced pressure to obtain a crude product, which was then purified by column chromatography over silicagel (100-200 mesh) using 30-35% ethyl acetate in hexanes as an eluent to obtain the title compound (0.2 g, 32.9%).

Provenance & Evidence