Potassium Phosphate, Dibasic → ethyl 3-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-2-carboxylate

Participants

Reaction Steps

This reaction was carried out in 5 batches using the same procedure. To a mixture of ethyl 3-(4-chlorophenyl)-1H-pyrrole-2-carboxylate [for synthesis see ACI-01] (1.25 g, 5.01 mmol), K2HPO4 (2.62 g, 15 mmol) and dichlortris(1,10-phenanthroline)-ruthenium(II) hydrate (71 mg, 0.10 mmol) in argon degassed dry MeCN (35 mL) was added CF3SO2Cl (1.60 mL, 15 mmol). The reaction mixture was stirred for 16 h at room temperature adjacent to a fluorescent light bulb (E27-32W, 4000K, 65 mA). After 16 h, an additional amount of CF3SO2Cl (0.20 mL, 1.88 mmol) was added and the reaction mixture was stirred overnight at room temperature adjacent to a fluorescent light bulb. All reaction mixtures were combined and diluted with EtOAc (150 mL) and H2O was added. The aqueous layer was extracted with EtOAc (150 mL). The organic layers were combined and the solvent was evaporated to give an oil. The crude product was purified by flash chromatography (silica, gradient heptane/EtOAc, 1:0→1:1) to furnish the desired product (4.59 g, 58%).

Provenance & Evidence