反应详情

To a mixture of 1.95 grams (0.051 mole) of lithium aluminum hydride and 30 ml. of tetrahydrofuran is added a solution of 10.5 grams (0.051 mole) of 4-(2,2dimethyl-1-oxopropyl)-benzoic acid in 110 ml. of tetrahydrofuran. The mixture is stirred for 2 hours at 0°-5° C., and then quenched by the addition of sodium sulfate solution. The resulting mixture is made acidic by the cautious add ition of concentrated hydrochloric acid. The mixture is extracted with ether; and the extracts are then washed with 50% brine, dried over magnesium sulfate, filtered and evaporated. The resulting solid is dissolved in aqueous sodium hydroxide, filtered and after acidification with hydrochloric acid, again extracted with ether, dried over magnesium sulfate, filtered and evaporated to yield the title product (m.p. 161.5°-163° C.).

1. customquenched by the addition of sodium sulfate solution
2. additioncautious add ition of concentrated hydrochloric acid
3. extractionThe mixture is extracted with ether
4. washand the extracts are then washed with 50% brine
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. customevaporated
8. dissolutionThe resulting solid is dissolved in aqueous sodium hydroxide
9. filtrationfiltered
10. extractionafter acidification with hydrochloric acid, again extracted with ether
11. dry with materialdried over magnesium sulfate
12. filtrationfiltered
13. customevaporated