反应详情

A mixture of 0.44 g (2.56 mmol) of palladium chloride and 1.34 g (5.12 mmol) of triphenylphosphine in 200 mL of acetonitrile is stirred under nitrogen at room temperature for 30 minutes. To this mixture is added an additional 150 mL of acetonitrile, 22.09 g (52.2 mmol) of dimethyl N-(2-fluoro-4-iodobenzoyl)-L-glutamate, 13.830 g (51.2 mmol) of 2-pivaloylamino-4-hydroxy-6-ethynylpyrido[2,3-d]pyrimidine, 0.0244 g (1.28 mmol) of copper iodide, and 15 mL (107.5 mmol) of triethylamine. The reaction mixture is then heated at reflux for 3 hours and then cooled to room temperature, the solvent is then removed in vacuo and the crude solid chromatographed on silica gel with 1:19 methanol:methylene chloride to give 18.1 g (62.5%) of dimethyl N-(2-fluoro-4-[2-(2-pivaloylamino-4-hydroxypyrido[2,3-d]-pyrimidin-6-yl)ethynyl]-benzoyl)-L-glutamate as a white solid m.p. 204°-207° C. (dec); Rf =0.60 (1:19 methanol: chloroform), Mass (FD)=565; IR (KBr, cm-1)=813, 1151, 1201, 1270, 1375, 1444, 1481, 1490, 1527, 1548, 1598, 1623, 1649, 1670, 1741, 1753; UV (EtOH) λmax =325 (epsilon=41100), 266 (epsilon=14600), 210 (epsilon=35700).

1. temperatureThe reaction mixture is then heated
2. temperatureat reflux for 3 hours
3. temperaturecooled to room temperature
4. customthe solvent is then removed in vacuo
5. customthe crude solid chromatographed on silica gel with 1:19 methanol