Hexane → HCID 59750776, 화합물

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In an argon gas stream and at −78° C., n-butyl lithium (a 1.57M hexane solution, 0.701 ml, 1.10 mmol) was added to a dimethoxyethane (5 ml) solution of the 2-[(4-chlorophenyl)sulfonylmethyl]-1,4-difluorobenzene (303 mg, 1.00 mmol) obtained in Example 5. The mixture was stirred at −78° C. for 1 hour and then, at room temperature for 30 minutes. The reaction mixture was cooled to −78° C., followed by the dropwise addition of 4-(t-butyldimethylsilyloxy)-1-iodobutane (0.260 ml, 1.00 mmol). While elevating the temperature of the reaction mixture to room temperature, stirring was conducted for 15 hours. Water was added to the reaction mixture, followed by extraction with diethyl ether. The extracts were combined, washed successively with water and brine, dried over MgSO4, and concentrated. The residue thus obtained was purified by medium-pressure chromatography on a silica gel column (8% ethyl acetate-hexane), whereby the title compound (401 mg, 82%) was obtained as a colorless solid. The resulting solid was recrystallized from hexane to yield colorless needle crystals.

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