反应详情

To a stirred solution of 0.97 g (3.8 mmole) of 2,4,5,6-tetrafluoro[1,1'-biphenyl]-3-methanol and 1 ml of dry triethylamine in 8 ml of dry diethyl ether was added 4 ml of a dry diethyl ether solution of trans-3-(2,2-difluoroethenyl)-2,2-dimethylcyclopropanecarbonyl chloride (0.95 mmole/ml). The resultant mixture was stirred at room temperature for approximately 18 hours, then poured into 50 ml of water. The organic phase was separated, washed with a 5% aqueous sodium bicarbonate solution followed by a water wash, then dried over anhydrous magnesium sulfate. The organic phase was filtered, and the filtrate evaporated under reduced pressure to give an oil. The oil was purified by column chromatography on silica gel, eluted with ethyl acetate:hexanes (10:90), to yield 0.92 g of (2,4,5,6-tetrafluoro[1,1'-biphenyl]-3-yl)methyl trans-3-(2,2-difluoroethenyl)-2,2-dimethylcyclopropanecarboxylate as a solid (m.p. 69°-72° C.).

1. customThe organic phase was separated
2. washwashed with a 5% aqueous sodium bicarbonate solution
3. washwash
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationThe organic phase was filtered
6. customthe filtrate evaporated under reduced pressure
7. customto give an oil
8. customThe oil was purified by column chromatography on silica gel
9. washeluted with ethyl acetate:hexanes (10:90)