Water → HCID 178447944, compound

Participants

Reaction Steps

16.4 g of the compound (8), 0.2 g of p-toluenesulfonic acid and 80 mL of toluene were mixed, and the mixture was refluxed under heating for 2 hours while water distilled out was removed. After cooling the resulting reaction mixture to 25° C., 200 mL of water and 200 mL of toluene were added to and mixed with the reaction mixture, which was separated into an organic layer and an aqueous layer by standing still, so as to attain extraction to the organic layer. The resulting organic layer was fractionated and washed with a 2N sodium hydroxide aqueous solution, a saturated sodium bicarbonate aqueous solution and water, followed by drying over anhydrous magnesium sulfate. Thereafter, the solvent was distilled off under reduced pressure to obtain a residue. The resulting residue was purified by silica gel column chromatography using a mixed solvent of heptane and toluene (heptane/toluene=4/1 by volume) as eluent, and then further purified by recrystallization from a mixed solvent of heptane and ethanol (heptane/ethanol=2/1 by volume) to obtain 6.2 g of 2-chloro-4-ethoxy-3-fluoro-1-(4-(2-(trans-4-propylcyclohexyl)-2-ethyl)-cyclohexa-1-enyl)benzene (No. 103). The yield based on the compound (7) was 42.4%.

Provenance & Evidence