Method for the preparation of benzyloxyphenoxy pentanoates

Details Method for the preparation of benzyloxyphenoxy pentanoates Method for the preparation of benzyloxyphenoxy pentanoates

1986-08-15

1987-12-15

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

562464, 562463, 568325, C07C 6976

Patent

active

047134712

ABSTRACT:
A method of producing benzoyloxyphenoxy pentanoic acid esters comprising the steps of: (a) reacting a compound of the formula ##STR1## wherein A is as defined with a compound of the formula ##STR2## wherein X is as defined, in the presence of a base selected from carbonate salts of alkaline earth or alkali metals, a catalyst and a ketonic solvent to produce a 3-(4-benzyloxyphenoxy)-2-butanone; and (b) reacting said 3-(4-benzyloxyphenoxy)-2-butanone with a dialkyl carbonate of the formula (RO).sub.2 CO, wherein R is an alkyl group having from 1 to 4 carbon atoms, in the presence of a suitable base and an organic solvent, to form alkyl 4-(4-benzyloxyphenoxy)-3-oxopentanoate.

REFERENCES:
patent: 4540804 (1985-09-01), Wehrenberg
patent: 4547582 (1985-10-01), Wehrenberg

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