反应详情

温度

80 °C

Diacetoxypalladium (0.482 g, 2.15 mmol) was added in one portion to a mixture of 1-(vinyloxy)butane (11.91 mL, 92.02 mmol), 2,4-dichloro-5-methylpyrimidine (5 g, 30.67 mmol) and triethylamine (4.51 mL, 32.21 mmol) in degassed polyethylene glycol 200 (25 mL) under N2. The resulting mixture was stirred at 80° C. for 18 h. The mixture was then cooled and extracted with diethyl ether (3×75 mL). The combined organic solutions were dried (MgSO4), diluted with heptane (115 mL) and filtered through a 75 g silica plug, eluting with 2:1 diethyl ether/heptanes, to give the title compound (8.62 g, 124%) as a yellow oil which was used without further purification; 1H NMR: 0.92 (3H, t), 1.35-1.43 (2H, m), 1.60-1.71 (2H, m), 2.17 (3H, d), 4.06 (2H, t), 5.93 (1H, d), 7.90 (1H, d), 8.33 (1H, d); m/z: ES+ MH+ 226.

1. temperatureThe mixture was then cooled
2. extractionextracted with diethyl ether (3×75 mL)
3. dry with materialThe combined organic solutions were dried (MgSO4)
4. additiondiluted with heptane (115 mL)
5. filtrationfiltered through a 75 g silica plug
6. washeluting with 2:1 diethyl ether/heptanes