反应详情

温度

50 °C

To methyl 3-(3,5-dibromo-2-oxopyrazin-1(2H)-yl)-5-fluoro-4-methylbenzoate (Example 252g, 0.9 g) in THF (3 mL) was added (2R,3R)-3-amino-2-methyl-3-phenylpropan-1-ol (Example 328a, 0.389 g) and Hunig's Base (0.374 mL) and the reaction stirred at 50° C. for 8 h. The reaction mixture was diluted with ethyl acetate and washed with aqueous NaHCO3. The organics were dried (MgSO4) and concentrated in vacuo to leave the crude product which was triturated overnight in 2:1 isohexane/diethyl ether to give the subtitle compound. Purification of the filtrate (SiO2 chromatography eluting with 50-100% diethyl ether in isohexane) to give further subtitle compound (total 0.820 g).

1. washwashed with aqueous NaHCO3
2. dry with materialThe organics were dried (MgSO4)
3. concentrationconcentrated in vacuo
4. customto leave the crude product which
5. customwas triturated overnight in 2:1 isohexane/diethyl ether