反应详情

To a mixture of 1-bromo-4-fluoro-2-(2-iodo-benzyloxy)-benzene (117.4 g, 0.29 mol), sodium acetate (36.1 g, 0.44 mol), tetra-n-butylammonium bromide (90.3 g, 0.29 mol), palladium (II) acetate (1.8 g, 8 mmol, 3 mol %), and N-methylpyrrolidinone (900 mL) at 55-60° C., add dropwise a solution of ethyl acrylate (34.3 mL, 0.32 mol) in N-methylpyrrolidinone (200 mL). Cool the reaction mixture to room temperature and treat with water (2 L) and methyl tert-butyl ether (2 L). Pass the reaction through diatomaceous earth, add ethyl acetate (1 L), separate the layers, and wash with water (2 L). Dry the organic portion over anhydrous sodium sulfate, filter, and concentrate. Suspend the resulting solid in hexanes (1 L), refrigerate for 2 h, filter, and wash with cold hexanes (500 mL). Dry in a vacuum oven (50° C./20 mm Hg) to obtain the title compound as a pale yellow solid (104.4 g, 95%). LC-MS m/z 381.0 [M+H]+.

1. customPass the reaction through diatomaceous earth
2. customseparate the layers
3. washwash with water (2 L)
4. dry with materialDry the organic portion over anhydrous sodium sulfate
5. filtrationfilter
6. concentrationconcentrate
7. filtrationfilter
8. washwash with cold hexanes (500 mL)
9. customDry in a vacuum oven (50° C./20 mm Hg)