Method for the preparation of benzyloxyphenoxy pentanoates
申请人:Stauffer Chemical Company
公开号:US04713471A1
公开(公告)日:1987-12-15
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.