反应详情

温度

0 °C

To a 1M solution of ethyl magnesium bromide (2 mL, 1.5 equiv), THF (10 mL) was added and the reaction mixture was cooled down to 0° C. A solution of 0.5 M in THF of zinc dichloride (4 mL, 1.5 equiv) was added slowly and the reaction mixture was stirred for 30 min at the same temperature. Pd(tBu3P)2 (102 mg, 0.1 equiv) was added followed by the addition of a solution of 3-bromo-4-[(phenylmethyl)oxy]benzonitrile (Intermediate 110, 576 mg) in THF and the reaction was allowed to reach room temperature. After stirring 30 minutes, some additional Pd(tBu3P)2 was added (51 mg, 0.05 equiv), then 30 min stirring, then third addition of Pd(tBu3P)2 (51 mg, 0.05 equiv) and stirring 30 min. The reaction mixture was quenched with an aqueous saturated solution of NH4Cl (100 mL) and extracted 3 times with ethyl acetate (3×150 mL). The gathered organic phases were filtrated on celite, dried over sodium sulphate. The residue obtained was purified by chromatography on silica gel (Companion system, 40 g Si cartridge) using as eluent a gradient cyclohexane/ethyl acetate 100:0, then 100:0 to 90:10. Evaporation afforded the title compound (336 mg) as a white solid.

1. customto reach room temperature
2. stirringAfter stirring 30 minutes
3. stirring30 min stirring
4. stirringstirring 30 min
5. customThe reaction mixture was quenched with an aqueous saturated solution of NH4Cl (100 mL)
6. extractionextracted 3 times with ethyl acetate (3×150 mL)
7. filtrationThe gathered organic phases were filtrated on celite
8. dry with materialdried over sodium sulphate
9. customThe residue obtained
10. customwas purified by chromatography on silica gel (Companion system, 40 g Si cartridge)
11. customEvaporation