Ammonium Chloride → HCID 23499595, compound

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Reaction Steps

810 mg (2.27 mmol) of 4-bromo-3,5-dimethylphenyl triisopropylsilyl ether (Example VII) are dissolved in 10 ml of tetrahydrofuran. At −78° C., 147.3 mg (2.3 mmol) of butyllithium (2.4 molar in hexane) are added dropwise. At the same temperature, stirring is continued for one hour, and 600 mg (1.62 mmol) of 4-(benzyloxy)-3-[(4-fluorophenyl)sulphonyl]benzaldehyde (Example VI), dissolved in 4 ml of tetrahydrofuran, are then added dropwise. The mixture is stirred at −78° C. for one hour, and saturated ammonium chloride solution is then added. The mixture is extracted three times with ethyl acetate and the combined organic phases are dried with sodium sulphate and concentrated. This gives 580 mg (55% of theory) of {4-(benzyloxy)-3-[(4-fluorophenyl)sulphonyl]phenyl}{2,6-dimethyl-4-(triisopropylsilyl)oxy]phenyl}methanol.

Provenance & Evidence