Hydrochloric Acid → (4-Fluoro3-phenoxyphenyl)methyl 2-cyclopropyl-2-(4-chlorophenyl)ethyl ether

Beteiligte Stoffe

Reaktionsschritte

Under a nitrogen atmosphere a suspension of 0.06 gram (0.0024 mole) of 97% sodium hydride in 2.2 mL of dimethylformamide was stirred, and a solution of 0.40 gram (0.002 mole) of stereoisomer (A) of 2-cyclopropyl-2-(4-chlorophenyl)ethyl ethanol in 1.0 mL of dimethylformamide was slowly added. Upon completion of addition, the reaction mixture was stirred for 1.5 hours, and then a solution of 0.46 gram (0.0019 mole) of (4-fluoro-3-phenoxyphenyl)methyl chloride in 1.0 mL of dimethylformamide was added. Upon completion of addition, the reaction mixture was stirred for one hour, and then 2-3 mL of water was added. The mixture was poured into 75 mL of aqueous, 10% hydrochloric acid and then was extracted with two 50 mL portions of hexane. The combined hexane layers were washed with 25 mL of a saturated, aqueous solution of sodium chloride. The organic layer was dried with sodium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residual oil. The oil was subjected to rotating disk thin layer chromatography on silica gel using diethyl ether: hexane (19:1) as eluant. The appropriate fractions were combined and concentrated under reduced pressure, yielding 0.55 gram of stereoisomer (A) of (4-fluoro-3-phenoxyphenyl)methyl 2-cyclopropyl-2-(4-chlorophenyl)ethyl ether as an oil. The nmr spectrum was consistent with the proposed structure. [α]D25 =(+)22.19°.

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