反应详情

温度

80 °C

3.2 g (9.7 mmol) of 1-(6-bromopyrid-2-yl)-3-heptyl-1-methylurea, 4.2 g (12.6 mmol) of methyl 2(S)-ethoxy-3-[4-(4,4,5,5-tetramethyl[1,3,2]dioxaborolan-2-yl)phenyl]propanoate (prepared as in Example 7e) and 4.4 g (29.1 mmol) of caesium fluoride are placed in 200 ml of dimethoxyethylene glycol. The reaction medium is degassed, 0.23 g (0.3 mmol) of dichlorodiphenylphosphinoferrocenepalladium is then added and the reaction medium is stirred at 80° C. for 18 hours. After addition of water, the reaction medium is extracted with ethyl acetate. The organic phase is washed with water, with saturated sodium chloride solution, dried over magnesium sulfate, filtered and evaporated. The residue obtained is purified by thin-layer chromatography on silica eluted with an 80/20 heptane/ethyl acetate mixture. 2 g (45%) of methyl 2(S)-ethoxy-3-{4-[6-(3-heptyl-1-methylureido)pyrid-2-yl]phenyl}propanoate are obtained.

1. customThe reaction medium is degassed
2. addition0.23 g (0.3 mmol) of dichlorodiphenylphosphinoferrocenepalladium is then added
3. additionAfter addition of water
4. extractionthe reaction medium is extracted with ethyl acetate
5. washThe organic phase is washed with water, with saturated sodium chloride solution
6. dry with materialdried over magnesium sulfate
7. filtrationfiltered
8. customevaporated
9. customThe residue obtained
10. customis purified by thin-layer chromatography on silica
11. washeluted with an 80/20 heptane/ethyl acetate mixture