反应详情

Under inert gas atmosphere 181 mg (0.248 mmol) PdCl2(dppf)xCH2Cl2 are added to a mixture of 30.0 g (124 mmol) (S)—N-[1-(4-bromo-phenyl)-ethyl]-acetamide (1.1), 139 mL (279 mmol) 2N sodium carbonate solution and 16.8 g (136 mmol) pyridine-4-boronic acid in 300 mL 1,4-dioxane and 100 mL methanol. The mixture is stirred for 5 d at reflux. After that time, the residue is poured into water (3 L) and extracted with dichloromethane (3×). The combined organic layers are washed with water and dried over magnesium sulphate. The solvent is evaporated and the residue is triturated with acetone and tert-butyl methyl ether.

1. temperatureat reflux
2. extractionextracted with dichloromethane (3×)
3. washThe combined organic layers are washed with water
4. dry with materialdried over magnesium sulphate
5. customThe solvent is evaporated
6. customthe residue is triturated with acetone and tert-butyl methyl ether