反应详情

温度

-78 °C

A solution of N-(4-fluoro-3-methoxybenzyl)-6-formyl-2-methylpyrimidine-4-carboxamide (2 g, 6.59 mmol, Preparation #8) in THF (200 mL) was cooled to about −78° C. and methyl magnesium bromide was added drop wise (8.79 mL, 26.4 mmol, 3M in ether). Upon completion of addition, the reaction mixture stirred for about 4 h at −78° C. The reaction mixture was quenched with aqueous ammoniumchloride (20 mL) and the product extracted with EtOAc (2×100 mL). The organic layer was washed successively with water (1×50 mL), brine (1×50 mL), dried over sodium sulphate and concentrated under reduced pressure to afford N-(4-fluoro-3-methoxybenzyl)-6-(1-hydroxyethyl)-2-methylpyrimidine-4-carboxamide (1 g, 47.6% yield) as a light yellow solid. 1H NMR (400 MHz, DMSO): δ 9.40 (bs, 1H) 7.95 (s, 1H) 7.17-7.11 (m, 2H) 6.89-6.88 (m, 1H) 5.75-5.71 (m, 1H) 4.49-4.47 (m, 2H) 3.81 (s, 3H) 2.68 (s, 3H) MS m/z=320 (m+H)+.

1. additionUpon completion of addition
2. customThe reaction mixture was quenched with aqueous ammoniumchloride (20 mL)
3. extractionthe product extracted with EtOAc (2×100 mL)
4. washThe organic layer was washed successively with water (1×50 mL), brine (1×50 mL)
5. dry with materialdried over sodium sulphate
6. concentrationconcentrated under reduced pressure