反应详情

Lithium aluminum hydride (33.4 g) was suspended in THF (500 ml). trans-4-Propylcyclohexylcarboxylic acid (s30) (50.0 g) was added dropwise to the suspension in the temperature range of −20° C. to −10° C., and the mixture was stirred at the same temperature range for 2 hours. After the completion of reaction had been confirmed by means of GC analysis, ethyl acetate and a saturated aqueous solution of ammonia were added successively to the reaction mixture under ice-cooling, and the deposits were removed by filtration through Celite. The filtrate was extracted with ethyl acetate. The combined organic layers were washed successively with water and brine, and then dried over anhydrous magnesium sulfate. The products were purified by recrystallization from heptane to give trans-4-propyl cyclohexylmethanol (s31) (45.0 g). The yield based on the compound (s30) was 98.1%.

1. customAfter the completion of reaction
2. temperaturecooling
3. customthe deposits were removed by filtration through Celite
4. extractionThe filtrate was extracted with ethyl acetate
5. washThe combined organic layers were washed successively with water and brine
6. dry with materialdried over anhydrous magnesium sulfate
7. customThe products were purified by recrystallization from heptane