反应详情

Following the method of Thorand and Krause (J. Org. Chem. 1998, 63, 8551), to a stirred solution of 500 mg (1.50 mmol) 4-furan-2-yl-5-iodo-6-methylsulfanyl-pyrimidin-2-ylamine in 10 ml dry degassed THF under argon at room temperature were added 211 mg (0.30 mmol) bis(triphenylphosphine)palladium(II) chloride, 10 mg (0.04 mmol) triphenylphosphine, 0.25 ml (2.28 mmol) phenylacetylene and 0.31 ml (2.22 mmol) triethylamine. Stirring was continued for 30 minutes then 3.0 mg (0.02 mmol) copper(I) iodide was added and the reaction mixture stirred for an additional 72 hours at room temperature. The reaction mixture was then concentrated in vacuo. Chromatography (1/4-1/1 ethyl acetate/hexane) afforded 161 mg (35%) 4-furan-2-yl-6-methylsulfanyl-5-phenylethynyl-pyrimidin-2-ylamine as a yellow crystalline solid. EI-MS m/e (%): 307 (M+, 100), 306 ([M—H]+, 52), 230 (38).

1. customdegassed THF under argon at room temperature
2. stirringthe reaction mixture stirred for an additional 72 hours at room temperature
3. concentrationThe reaction mixture was then concentrated in vacuo