Preparation of 2-substituted 4-acyloxy-2-butenals

Details Preparation of 2-substituted 4-acyloxy-2-butenals Preparation of 2-substituted 4-acyloxy-2-butenals

1987-11-02

1989-10-10

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

560177, 546341, 2604045, C07C 6700

Patent

active

048733628

ABSTRACT:
2-Substituted 4-acyloxy-2-butenals of the general formula I ##STR1## where R.sup.1 is alkyl of 1 to 12 carbon atoms which may be substituted by cycloalphatic, aromatic or heterocyclic radicals, by alkenyl or alkynyl or by hydroxyl, ether, thioether, acetoxy acyl, alkylamino, carboxyl or carbalkoxy, and R.sup.2 is acyloxy, are prepared by reacting a monosubstituted acetaldehyde of the general formula II ##STR2## where R.sup.2 has the abovementioned meaning, with an aldehyde of the general formula III ##STR3## where R.sup.1 has the abovementioned meaning, in the presence of a linear or cyclic secondary amine and of an organic acid at from 20.degree. to 100.degree. C.

REFERENCES:
patent: 3840589 (1974-10-01), Himmele et al.

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