Ethylene → HCID 20687262, compound

Participants

Reaction Conditions

Reaction Steps

A solution of (5-bromo-pyridin-2-yl)-carbamic acid methyl ester (1.68 g, 7.2 mmol) in acetonitrile (15 ml) and triethylamine (1.84 ml) was treated with palladium acetate (65 mg, 0.29 mmol) and tri-o-tolylphosphine (295 mg, 0.97 mmol). The mixture was placed in a pressure reactor under 130 psig of ethylene pressure and heated at 85° C. for 18 hours. The reaction mixture was cooled, vented and diluted with ethyl acetate and filtered. The ethyl acetate solution was washed sequentially with 1M aqueous citric acid, water, brine and was dried over sodium sulfate and filtered. The filtrate was evaporated. The residue was recrystallized from dichloromethane-hexane to afford 0.759 g (58%) of the title product as colorless crystals. mp 146-148° C. 1H NMR (CDCl3): δ=9.04 (br, 1 H): 8.28 (d, 1 H); 7.97 (d, 1 H); 7.77 (d of d, 1 H); 6.64 (d of d, 1 H); 5.71 (d, 1 H); 5.26 (d, 1 H); 3.81 (s, 3H). MS (Cl): m/z =179 (M+H+).

Provenance & Evidence