反应详情

温度

-20 °C

To a solution of 4-(4-chlorobenzyl)-N-methoxy-N-methyl-2-(pyridin-4-yl)thiazole-5-carboxamide (1.79 g, 4.79 mmol) in THF (97 mL) at −20° C. was added a 1.60 M solution of MeLi in ether (4.19 mL, 6.70 mmol). The reaction was stirred for 30 minutes at −20° C. An additional portion of a 1.60 M solution of MeLi in ether (0.838 mL, 1.34 mmol) was added and the reaction was stirred for 30 more minutes at −20° C. The reaction was quenched by adding saturated ammonium chloride (25 mL) followed by water (35 mL). The mixture was extracted with ethyl acetate (2×150 mL) and the combined organic layers were dried, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (EA/DCM=0/100→80/20) to give 1.27 g (81% yield) of the title compound as a light yellow solid. LC/MS (FA) ES+ 329, 331. 1H NMR (300 MHz, CDCl3) δ: 8.75-8.73 (m, 2H), 7.83-7.81 (m, 2H), 7.34-7.31 (m, 2H). 7.26-7.23 (m, 2H), 4.53 (s, 2H), 2.59 (s, 3H).

1. stirringthe reaction was stirred for 30 more minutes at −20° C
2. customThe reaction was quenched
3. additionby adding saturated ammonium chloride (25 mL)
4. extractionThe mixture was extracted with ethyl acetate (2×150 mL)
5. customthe combined organic layers were dried
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe residue was purified by silica gel chromatography (EA/DCM=0/100→80/20)