反应详情

5-Chloro-2-(3,5-dimethylphenyl)quinoline (4.3 g, 16.06 mmol), isobutylboronic acid (3.2 g, 31.4 mmol), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine (0.538 g, 1.31 mmol), and potassium phosphate monohydrate (18.3 g, 79 mmol) were mixed in 114 mL of toluene. The system was degassed for 20 minutes. Pd2(dba)3 was then added and the system was refluxed overnight. After cooling to room temperature, the reaction mixture was filtered through a Celite® plug and eluted with dichloromethane. The product was further purified by a Kugelrohr distillation and then further purified by column chromatography using 5% ethyl acetate in hexanes. This was followed by another Kugelrohr distillation to give 3.2 g (72% yield) of product.

1. customThe system was degassed for 20 minutes
2. additionPd2(dba)3 was then added
3. temperaturethe system was refluxed overnight
4. filtrationthe reaction mixture was filtered through a Celite® plug
5. washeluted with dichloromethane
6. distillationThe product was further purified by a Kugelrohr distillation
7. customfurther purified by column chromatography
8. distillationThis was followed by another Kugelrohr distillation