反应详情

温度

-30 °C

Under nitrogen gas stream, a mixture of 405 g (1180 mmol) of methoxymethyltriphenylphosphonium chloride with 4.0 l of THF was cooled down to −30° C., 122 g (1090 mmol) of t-BuOK was added thereto, and they were stirred for 1 hour. To this mixture was added by drops a solution of 240 g (907 mmol) of the crude 3-(trans-4-(trans-4-propylcyclohexyl)cyclohexyl)propanal in 2.4 l of THF while being maintained at a temperature lower than −30° C. After finishing of the dropping, the reaction temperature was gradually raised up to room temperature, and the mixture was stirred for further 5 hours. The reaction mixture was filtered with Celite, the solvent was distilled off under a reduced pressure, and the residue was subjected to silica gel column chromatography (eluent: heptane) to obtain 152 g of a crude 1-methoxy-4-(trans-4-(trans-4-propylcyclohexyl)cyclohexyl)butene.

1. temperaturewhile being maintained at a temperature lower than −30° C
2. temperaturethe reaction temperature was gradually raised up to room temperature
3. stirringthe mixture was stirred for further 5 hours
4. filtrationThe reaction mixture was filtered with Celite
5. distillationthe solvent was distilled off under a reduced pressure