Ethyl Acrylate → Ethyl 3-(4-amino-2-fluorophenyl)prop-2-enoate

Participants

Reaction Conditions

Reaction Steps

4-Bromo-3-fluoroaniline (5.0 g) was dissolved in a mixed solvent of DMF (18 ml) and N,N-diisopropylethylamine (18 ml). Ethyl acrylate (3.9 ml), palladium acetate (295 mg), and tris(2-methylphenyl) phosphine (3.2 g) were added to the obtained mixture in a nitrogen atmosphere, and the mixture was stirred at 110° C. for 5 hours. The reaction mixture was filtered through Celite and separated with ethyl acetate and water. The organic layer was washed with a saturated sodium chloride solution, and then dried over anhydrous sodium sulfate. The solvent was distilled off, and the residue was purified by neutral silica gel column chromatography (14-25% ethyl acetate/n-hexane). The purified material was crystallized with n-hexane to obtain Compound 2a (4.2 g, 76%) as a yellow solid.

Provenance & Evidence