反应详情

温度

80 °C

Pd(Ph3)4 (37 mg, 0.03 mmol) and PdCl2(Ph3)2 (22 mg, 0.03 mmol) were added to a mixture of pyrrolidine-1,2-dicarboxylic acid 2-[2-(7-bromo-9,10-dihydro-phenanthren-2-yl)-2-oxo-ethyl]ester 1-tert-butyl ester (410 mg, 0.8 mmol) and tributyl(1-ethoxyvinyl)tin (0.32 mL, 0.96 mmol) in 8 mL dioxane. The reaction mixture was flushed with nitrogen, heated at 80° C. for 16 hours, then cooled to ambient temperature. Water (2 mL) and NBS (171 mg, 0.96 mmol) were added and the mixture was stirred at room temperature for 40 minutes, then diluted with ethyl acetate (100 mL). Washed with water and brine, dried over Na2SO4, filtered and concentrated in vacuo. Half of the obtained residue was suspended in acetonitrile (5 mL) To it was added a solution of 2-aza-bicyclo[2.2.1]heptane-2,3-dicarboxylic acid 2-tert-butyl ester (100 mg, 0.41 mmol) and DIPEA (0.068 mL, 0.39 mmol) in 2 mL acetonitrile. The mixture was stirred at room temperature for 16 hours, then diluted with ethyl acetate (100 mL). The organic layer was washed with NaHCO3 solution and water, dried over Na2SO4, filtered and concentrated in vacuo. The obtained residue was purified by flash chromatography to provide the desired product 2-aza-bicyclo[2.2.1]heptane-2,3-dicarboxylic acid 3-(2-{7-[2-(1 butoxycarbonyl-pyrrolidine-2-carbonyloxy)-acetyl]-9,10-dihydro-phenanthren-2-yl]-2-oxo-ethyl) ester 2-tert-butyl ester as a white solid (171 mg, 60% over two steps). m/z 717.2 (M+H)+.

1. customThe reaction mixture was flushed with nitrogen
2. temperaturecooled to ambient temperature
3. washWashed with water and brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. stirringThe mixture was stirred at room temperature for 16 hours
8. washThe organic layer was washed with NaHCO3 solution and water
9. dry with materialdried over Na2SO4
10. filtrationfiltered
11. concentrationconcentrated in vacuo
12. customThe obtained residue was purified by flash chromatography