反应详情

温度

0 °C

A mixture of [2-(benzhydrylidene-amino)-3-fluoropyridin-4-yl]-methanol (compound 8c-4) (5 g, 16.3 mmol), methanesulfonyl chloride (1.52 mL, 19.6 mmol) and lithium tert-butoxide (in THF) (18 mL, 18 mmol) in THF (40 mL) was stirred at 0° C. for 1 hour. The mixture was added to a solution of acetoacetic acid ethyl ester (4.16 mL, 32.7 mmol), lithium tert-butoxide (in THF) (19.6 mL, 19.6 mmol) and NaI (2.5 g, 16.3 mmol) in THF (18 mL). The solution was stirred at 50° C. for 3 hours, 0.2N LiOH (in water) and ethyl acetate were added thereto, and the solution was washed with 0.2N LiOH (in water) and saturated saline. After drying over anhydrous magnesium sulfate, the solvent was distilled away under reduced pressure to yield the title compound (6.98 g, quant.).

1. stirringThe solution was stirred at 50° C. for 3 hours
2. washthe solution was washed with 0.2N LiOH (in water) and saturated saline
3. dry with materialAfter drying over anhydrous magnesium sulfate
4. distillationthe solvent was distilled away under reduced pressure