Preparation of 4-acyloxy-2-methyl-crotonaldehydes
AssigneeBASF SE
InventorsRolf Fischer, Hans-Martin Weitz
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Abstract
A process for the preparation of a 4-acyloxy-2-methyl-crotonaldehyde of the formula ##STR1## where R is hydrogen or an aliphatic radical of 1 to 5 carbon atoms, by reacting a 1,1,4-triacyloxy-2-methyl-but-2-ene of the formula ##STR2## where R.sup.1 and R.sup.2 are each hydrogen or an aliphatic radical of 1 to 5 carbon atoms, with water in the presence of a carboxylic acid of the formula R--COOH III.
Claims5
A process for the preparation of a 4-acyloxy-2-methylcrotonaldehyde of the formula ##STR6## where R is hydrogen or an aliphatic radical of 1 to 5 carbon atoms, wherein a 1,1,4-triacyloxy-2-methyl-but-2-ene of the formula ##STR7## where R, R.sup.1 and R.sup.2 are each hydrogen or an aliphatic radical of 1 to 5 carbon atoms, is reacted with water at a temperature of from 0.degree.-200.degree. C. in the presence of from 0.1 to 50 moles per mole of II of a carboxylic acid of the formula
- R-COOH III
- where R has the above meanings.
Dependencies are inferred from the claim text.