tert-Butyl methyl ether → Methyl 2-chloro-6-(1-ethoxyvinyl)pyrimidine-4-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Methyl 2,6-dichloropyrimidine-4-carboxylate (8.44 g, 40.77 mmol) and bis(triphenylphosphine)-palladium(II) chloride (0.572 g, 0.82 mmol) in DMF (80 mL) was degased. Tributyl(1-ethoxy-vinyl)tin (14.46 mL, 42.81 mmol) was added under argon. The mixture was heated at 94° C. for 1 h. The mixture was poured into a solution of potassium fluoride (30 g) in water (400 mL). MTBE (300 mL) was added and the mixture was stirred for 10 min. The mixture was filtered and the filter was washed with 200 mL of MTBE. The filtrate was washed with brine (100 mL), dried over sodium sulfate and the solvents were evaporated. The residue purified by column chromatography on silica eluting with DCM to give the title compound as a solid (7.40 g, 75%).

Herkunft & Nachweise