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method for preparation of m.fenoxybenzylhalogenide and m.fenoxybenzalhalogenide.
method for preparation of m.fenoxybenzylhalogenide and m.fenoxybenzalhalogenide.
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机译:法制备间苯二甲氧基苄卤化物和间苯甲酰苯氧基卤化物。
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摘要
Reaction of 3-phenoxytoluene with bromine at elevated temperature yields 3-phenoxybenzyl bromide, 3-phenoxybenzal bromide, or a mixture thereof. In contrast to teachings of the prior art, phosphorus halide catalysis or u.v. activation is not required to achieve a desirable amount of side-chain bromination with a minimum of nuclear halogenation. For example, it was observed that at 265+/-5 DEG C., good yields of the desired benzyl and benzal bromide were obtained, but no nuclear halogenated by-product was detected by gas chromatography.
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