Boron tribromide → Phenol, 5-chloro-2-nitro-

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반응 단계

A 1M solution of boron tribromide in methylene chloride (400 mL, 0.40 mole) was cooled to -20° C. A solution of 37.5 g (0.20 mole) of 5-chloro-2-nitroanisole in 200 mL of methylene chloride was added slowly to the first solution. Upon completion of addition, the mixture was allowed to warm to ambient temperature at which it stirred for about 16 hours. At the conclusion of this period the reaction mixture was poured into ice water. The organic layer was separated from the aqueous layer and was evaporated under reduced pressure, leaving 31.40 g of 5-chloro-2-nitrophenol as a solid residue, m.p. 38°-39° C.

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