Bromination of substituted benzaldehydes

Details Bromination of substituted benzaldehydes Bromination of substituted benzaldehydes

1984-12-24

1985-11-05

Helfin, Bernard

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

Organic compounds

Oxygen containing

568442, C07C 4563

Patent

active

045515581

ABSTRACT:
Substituted bromobenzaldehydes, e.g., 5-bromovanillin, are facilely prepared with overall avoidance of HBr by-product, by (i) first brominating the corresponding benzaldehyde with a less than stoichiometric amount of bromine, and (ii) completing said bromination reaction with a brominating couple which comprises (1) the hydrobromic acid generated in situ in the step (i) and (2) a bromide ion oxidizer.

REFERENCES:
patent: 4335263 (1982-06-01), Minai

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