反应详情

温度

0 °C

Into a 1 L glass flask with a dropping funnel, 62.8 g (0.847 mol, 1.2 eq) of n-butanol, 510 g of diisopropyl ether, 100 g (0.988 mol, 1.4 eq) of triethylamine and 1 g of antioxidant “Nonflex MBP” (manufactured by Seiko Chemical Co., Ltd.) were added. The resulting solution was cooled to 0° C. and stirred, followed by dropping thereto 170 g (purity: 99%, 0.706 mol) of methacrylic acid 1-chlorocarbonyl-1,1-difluoro-2-butyl ester. The thus-obtained reaction solution was stirred for 1 hour at room temperature. The completion of the reaction was confirmed by 19F NMR. The reaction-completed solution was separated into an organic layer and an aqueous layer by the addition of 500 mL of water. The organic layer was dehydrated with magnesium sulfate, filtrated, and then, concentrated under a reduced pressure. The concentration residue was subjected to distillation under a reduced pressure. With this, 179 g of methacrylic acid 1-(n-butoxycarbonyl)-1,1-difluoro-2-butyl ester was obtained as a colorless transparent liquid (yield: 91%, purity: 99%).

1. addition” (manufactured by Seiko Chemical Co., Ltd.) were added
2. customThe thus-obtained reaction solution
3. stirringwas stirred for 1 hour at room temperature
4. customThe reaction-completed solution was separated into an organic layer
5. additionan aqueous layer by the addition of 500 mL of water
6. filtrationfiltrated
7. concentrationconcentrated under a reduced pressure
8. distillationThe concentration residue was subjected to distillation under a reduced pressure