Boron Trichloride → (4-Fluorophenyl)[2-hydroxy-5-(2,6-dimethyl-4-nitrophenoxy)phenyl]methanone

関与物質

反応手順

A solution of 5.12 g (13.0 mmol) of (4-fluorophenyl)[2-methoxy-5-(2,6-dimethyl-4-nitrophenoxy) phenyl]methanone in 100 ml methylene chloride is chilled in an ice bath and 40 ml (40 mmol) of 1.0M boron trichloride in methylene chloride is gradually added. The solution is stirred at room temperature overnight, then poured into 300 ml of ice water and stirred 2 hours. The organic layer is separated, washed with 5% aqueous sodium carbonate, water, dried (CaSO4) and evaporated. The residue is recrystallized from ethanol to give (4-fluorophenyl)[2-hydroxy-5-(2,6-dimethyl-4 nitrophenoxy)phenyl]methanone, m.p. 148°-150°.

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