Abstract:Among the hydroxybenzaldehydes, only mono‐, di‐ and trihydroxybenzaldehydes are known. Salicylaldehyde (2‐hydroxybenzaldehyde) and 4‐hydroxybenzaldehyde represent more than 99% of the hydroxybenzaldehydes' market. The physical and chemical properties of hydroxybenzaldehydes are described. 2‐Hydroxy and 4‐hydroxybenzaldehydes react in a similar manner as phenol toward electrophiles. The aldehyde function can be reduced or oxidized to form a variety of compounds depending on the reagents and conditions used. Hyd… Show more
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