Tris(1,1-dimethylethyl)phosphine → HCID 25003913, compound

Participants

Reaction Steps

4-Bromo-N-methylbenzenesulfonamide (100 mg, 0.40 mmol), 5-cyano-1-methyl-1H-pyrrol-2-ylboronic acid (72 mg, 0.48 mmol), potassium fluoride (76 mg, 1.3 mmol), and tris(dibenzylideneacetone)dipalladium(0) (10 mg, 0.01 mmol) were placed in an oven dried flask under nitrogen and dry THF (1.0 mL) was added. Tri-t-butylphosphine (60 μL, 0.02 mmol, 10 wt % in hexane) was added and the reaction was stirred for 16 hours. The reaction mixture was filtered through silica and rinsed with ethyl acetate. The solvent was concentrated in vacuo to provide the crude product. The crude product was pre-adsorbed onto the Celite® reagent and purified via Isco chromatography (the Redisep™ column, silica, gradient 5-50% ethyl acetate in hexane) to afford 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N-methylbenzenesulfonamide (28 mg, 25%). MS (ESI) m/z 275. HPLC purity 100.0% at 210-370 nm, 9.0 min.; the Xterra® RP18 column, 3.5μ, 150×4.6 mm column, 1.2 mL/min., 85/15-5/95 (ammonium formate buffer pH=3.5/ACN+MeOH) for 10 min., hold 4 min.

Provenance & Evidence