Preparation of .beta., .gamma.-unsaturated carboxylic acids

Details Preparation of .beta., .gamma.-unsaturated carboxylic acids Preparation of .beta., .gamma.-unsaturated carboxylic acids

1990-04-30

1992-01-14

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

260413, 560114, 560204, 562406, 562497, 562590, 562595, 562598, C07C 5112

Patent

active

050812920

ABSTRACT:
.beta., .gamma.-Unsaturated carboxylic acids, e.g., 3-hexene-1,6-dioic acid, are selectively prepared by carbonylating (with carbon monoxide) an allyl alcohol, e.g., a butenediol, at an elevated temperature and under superatmospheric pressure, in the presence of a catalytically effective amount of a palladium-based catalyst and at least one quaternary onium chloride of one of the Group VB elements nitrogen or phosphorus, such element being tetracoordinated via carbon atoms and with the proviso that such nitrogen atom may be coordinated to two pentavalent phosphorus atoms.

REFERENCES:
patent: 4925973 (1990-05-01), Deweerdt et al.

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