Toluene → HCID 19107881, compound

Participants

Reaction Conditions

Reaction Steps

The compound (23) (130.1 g), p-toluenesulfonic acid (1.3 g) and toluene (500 ml) were mixed, and the mixture was heated under reflux for 2 hours while water being distilled was removed. The reaction mixture was cooled to 30° C., and then water (500 ml) and toluene (500 ml) were added thereto and mixed. The mixture was then allowed to stand until it had separated into two phases of organic and aqueous phases, and extraction into an organic phase was carried out. The organic phase obtained was fractionated, washed sequentially with a saturated aqueous solution of sodium hydrogencarbonate and water, and then dried over anhydrous magnesium sulfate. The solution obtained was purified with a fractional operation by means of column chromatography using toluene as the eluent and silica gel as the stationary phase powder, and dried, giving 71.6 g of 4-butoxy-(2,3-difluorophenyl)cyclohexene (24). The compound (24) obtained was a colorless oil, having the boiling point at 131 to 132° C./3 mmHg, and the yield based on the compound (6) was 66.5%.

Provenance & Evidence