反应详情

4.00 g (10.51 mmol) of 5-bromo-3-fluoro-2-(4-octyloxyphenyl)pyridine, 2.63 g (10.51 mmol) of 4-octyloxybenzeneboronic acid, 0.12 g (0.11 mmol) of tetrakis(triphenylphosphine)palladium(0) and 2.23 g (21.02 mmol) of sodium carbonate are heated at 80° C. for 3 hours in 100 ml of toluene, 70 ml of ethanol and 40 ml of water. The mixture is subsequently partitioned between aqueous sodium chloride solution and ether, and the organic phase is washed with aqueous sodium chloride solution, dried over sodium sulfate, evaporated and purified by chromatography (silica gel/dichloromethane), giving 3.72 g of 3-fluoro-2,5-di(4-octyloxyphenyl)pyridine. ##STR26## The compound has the phase sequence: X 88 (77.9) Sc 142 SA 171 N 172 I.

1. customThe mixture is subsequently partitioned between aqueous sodium chloride solution and ether
2. washthe organic phase is washed with aqueous sodium chloride solution
3. dry with materialdried over sodium sulfate
4. customevaporated
5. custompurified by chromatography (silica gel/dichloromethane)