反应详情

In 60 g of methylene chloride were dissolved 9 g of ethyl 2,2-difluoro-3-hydroxy-3-phenylpropionate, prepared in Synthesis Example 1-4, and 9.5 g of 1-adamantanecarbonyl chloride. Under ice cooling, a mixture of 6 g of triethylamine, 0.5 g of 4-dimethylaminopyridine and 20 g of methylene chloride was added dropwise to the solution. The reaction solution was aged overnight, after which it was quenched with 5 wt % hydrochloric acid, washed with water, and concentrated. Methyl isobutyl ketone was added to the concentrate, which was concentrated again. There was obtained 15 g of the target compound, 2-ethoxycarbonyl-2,2-difluoro-1-phenylethyl 1-adamantanecarboxylate as colorless oily matter (yield 68%).

1. additionwas added dropwise to the solution
2. customafter which it was quenched with 5 wt % hydrochloric acid
3. washwashed with water
4. concentrationconcentrated
5. additionMethyl isobutyl ketone was added to the concentrate, which
6. concentrationwas concentrated again