Chemical process for preparing 3-phenoxybenzyl chloride

Details Chemical process for preparing 3-phenoxybenzyl chloride Chemical process for preparing 3-phenoxybenzyl chloride

1982-01-18

1983-03-22

Helfin, Bernard

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

Organic compounds

Oxygen containing

C07C 4122

Patent

active

043777139

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. The comparable chlorination is also effective.

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patent: 4146737 (1979-03-01), Sheldon et al.
patent: 4326089 (1982-04-01), Keblys
Engelsma et al., Rec. Trav. Chim. Pays-Bas, vol. 80, (1961), 526-532.

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