反应详情

温度

130 °C

In a 2 L round bottom flask, 5-chloro-1-(4-methoxybenzyl)-3-(5-methyl-3-((trimethylsilyl)ethynyl)pyridin-2-ylamino)pyrazin-2(1H)-one (35.2 g, 77.85 mmol) was taken up with anhydrous toluene (880 mL), attached a reflux condenser and transferred to an oil bath that was heated to 130° C. The reaction was stirred in the oil bath for 94 h and concentrated in vacuo to afford a brown solid. The crude was suspended in ethyl acetate (200 mL) and heated to a mild boil. The product (pale yellow powder, 27.4 g, 89% yield) was collected by filtration, washed with additional ethyl acetate, diethyl ether and dried under high vacuum. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.43 (s, 9H) 2.56 (s, 3H) 3.80 (s, 3H) 5.30 (s, 2H) 6.89 (d, J=8.59 Hz, 2H) 7.11 (s, 1H) 7.35 (d, J=8.84 Hz, 2H) 8.22 (s, 1H) 8.52 (d, J=1.52 Hz, 1H). ESI-MS: m/z 392.4 (M+H)+.

1. customtransferred to an oil bath
2. concentrationconcentrated in vacuo
3. customto afford a brown solid
4. temperatureheated to a mild boil
5. filtrationThe product (pale yellow powder, 27.4 g, 89% yield) was collected by filtration
6. washwashed with additional ethyl acetate, diethyl ether
7. customdried under high vacuum