Methyl Acrylate → HCID 54071285, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 3-[N-(tert-butoxycarbonyl)-N-(4-trifluoromethylbenzyl)aminomethyl]-4-bromoanisole (37.08 g, 78 mmol), methyl acrylate (35 mL, 390 mmol), palladium acetate (0.88 g, 3.9 mmol), tri-o-tolylphosphine (2.38 g, 7.8 mol), and diisopropylethylamine (31 mL, 178 mmol) in acetonitrile (200 mL) was deoxygenated (3 evacuation/argon purge cycles), then was heated to reflux under argon (oil bath set at 80° C.). After 6 hr additional palladium acetate (0.88 g, 3.9 mmol) and tri-o-tolylphosphine ((2.38 g, 7.8 mmol) were added and the reaction was stirred under reflux for an additional 18 h. The reaction was concentrated to dryness, and the residue was taken up in 1:1 Et2O/petroleum ether (300 mL) and allowed to stand for 4 h. A gray-colored precipitate was filtered off and washed with a small volume of 1:1 Et2O/petroleum ether (100 mL). The orangish-red filtrate was concentrated and purified by flash chromatography on silica gel (15% ethyl acetate/hexanes). The resulting residue was taken up in hexane, and the mixture was allowed to stand for several hr, then was filtered to remove a yellow precipitate. Concentration of the filtrate left the title compound (34.52 g, 92%) as a thick yellow oil: TLC (silica, 20% EtOAc/hexanes) Rf 0.45; 1H NMR (400 MHz, CDCl3) δ 7.80 (br s, 1H), 7.57 (d, J=8.1 Hz, 2H), 7.53 (d, J=8.6 Hz, 1H), 7.29 (br s, 2H), 6.83 (dd, 1H), 6.72 (br s, 1H), 6.23 (d, J=15.7 Hz, 1H), 4.58 and 4.53 (2 br s, 2H), 4.46 and 4.37 (2 br s, 2H), 3.80 (s, 3H), 3.77 (s, 3H), 1.49 (s, 9H).

Provenance & Evidence