Thermal process for preparing 3-phenoxybenzyl bromide

Details Thermal process for preparing 3-phenoxybenzyl bromide Thermal process for preparing 3-phenoxybenzyl bromide

1977-09-26

1982-04-20

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 4122

Patent

active

043260896

ABSTRACT:
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.degree. C., good yields of the desired benzyl and benzal bromide were obtained, but no nuclear halogenated by-product was detected by gas chromatography.

REFERENCES:
patent: 3996291 (1976-12-01), Dietrich et al.
patent: 4085147 (1978-04-01), Rosinger et al.

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