Process for preparing aromatic aldehydes
AssigneeHoechst Aktiengesellschaft
InventorsGilbert Billeb, Peter Burg
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Abstract
A process for preparing aromatic aldehydes of the formula (1) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 independently of one another are H, F, Cl or Br, by hydrolyzing a dichloromethyl-substituted benzene of the formula (2) ##STR2## in which R.sup.1, R.sup.2, R.sup.3 have the abovementioned meanings with a from about 1 to about 50% strength aqueous solution of one or more zinc salts of the formula (3) ZnX.sub.n (3) in which X is F, Cl, Br, I, OH or SO.sub.4, and n is, depending on the anion X, the number 1 or 2, at temperatures of from about 70.degree. to about 160.degree. C.
Claims9
A process for preparing aromatic aldehydes of the formula (1) ##STR6## in which R.sup.1, R.sup.2, R.sup.3 independently of one another are H, F, C1 or Br, which comprises hydrolyzing a dichloromethyl-substituted benzene of the formula (2) ##STR7## in which R.sup.1, R.sup.2, R.sup.3 have the abovementioned meanings with a from about 1 to about 50 % strength aqueous solution of one or more zinc salts of the formula (3)
- ZnX.sub.n ( 3)
- in which X is F, C1, Br, I, OH or SO.sub.4, and n is, depending on the anion X, the number 1 or 2, at temperatures of from about 70.degree. to about 160.degree. C.
Dependencies are inferred from the claim text.