Method for producing 4-hydroxy-3-nitrobiphenyl
AssigneeBayer Aktiengesellschaft
InventorsHorst Behre, Michael Dockner, Alexander Klausener
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Abstract
A process is provided for preparing 4-hydroxy-3-nitrobiphenyl from 4-hydroxy-biphenyl by nitrating in the position adjacent to the phenolic hydroxyl group in high selectivity and yield, and the nitric acid used as the nitrating reagent is metered into the reaction system in a specific manner.
Claims17
A process for preparing 4-hydroxy-3-nitrobiphenyl by nitrating 4-hydroxybiphenyl using nitric acid, comprising heating a mixture of 4-hydroxybiphenyl and glacial acetic acid until the glacial acetic acid boils and then metering the nitric acid or a mixture of nitric acid and glacial acetic acid into the reflux of the boiling glacial acetic acid.
Dependencies are inferred from the claim text.