反应详情

温度

0 °C

1,1,3,3-Tetramethylguanidine (2.11 mL, 16.8 mmol) was added to a 0° C. solution of methyl 2-(tert-butoxycarbonyl)-2-(dimethoxyphosphoryl)-acetate (5.00 g, 16.8 mmol) in DCM (70 mL). The reaction mixture stirred at 0° C. for 30 minutes, then a solution of 4-chloro-3-fluorobenzaldehyde (2.67 g, 16.8 mmol) in DCM (10 mL) was added by syringe. The reaction mixture was stirred for 10 minutes and then warmed to room temperature with continued stirring for 1 hour. H2O was then added, and the mixture was extracted with DCM. The combined extracts were dried (Na2SO4), filtered, and concentrated. The resulting solids were recrystallized from IPA to give (Z)-methyl 2-(tert-butoxycarbonyl)-3-(4-chloro-3-fluorophenyl)acrylate (3.76 g, 67.8% yield) as a white powder (2 crops). LCMS (APCI−) m/z 328 [M−H]−.

1. stirringThe reaction mixture was stirred for 10 minutes
2. temperaturewarmed to room temperature
3. stirringwith continued stirring for 1 hour
4. extractionthe mixture was extracted with DCM
5. dry with materialThe combined extracts were dried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated
8. customThe resulting solids were recrystallized from IPA