Method of producing 3-bromobenzaldehyde

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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570254, C07C 4500

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active

049451863

ABSTRACT:
A method of producing 3-bromobenzaldehyde is disclosed, wherein, upon producing 3-bromobenzaldehyde by allowing benzaldehyde to react with bromine in the presence of brominating catalyst in 1,2-dichloroethane being a reaction solvent, 1,2-dichloroethane having been used for aforesaid reaction as a reaction solvent is recovered and, after the recovered solvent is allowed first to react with chlorine in the presence of above brominating catalyst, the reaction is performed by the addition of benzaldehyde and bromine. Foregoing 1,2-dichloroethane recovered may be brought to the reaction with chlorine with or without adding fresh 1,2-dichloroethane and above brominating catalyst is preferably aluminum chloride.

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patent: 4585898 (1986-04-01), Lau et al.
Organic Preparations and Procedures Int. 6(5), 251-253 (1974), "An Improved Procedure for the Meta-Bromination of Aromatic Carbonly Compounds".
Journal of Organic Chemistry, vol. 23, 1412 (1958), "The Swamping Catalyst Effect. II. Nuclear Halogenation of Aromatic Aldehydes and Ketones".

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