Manufacture of esters
AssigneeImperial Chemical Industries PLC
InventorMichael S. Howarth
Life of this patent
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Abstract
m-Phenoxybenzyl esters of carboxylic acids are prepared from the methyl or ethyl esters of the acids by reaction of the latter with m-phenoxybenzyl alcohol in the presence of a tetra-aryl titanate as catalyst.
Claims7
A process for the preparation of esters of m-phenoxybenzyl alcohol and its .alpha.-cyano and .alpha.-ethinyl derivatives with carboxylic acids which comprise mixing a methyl or ethyl ester of the carboxylic acid, m-phenoxybenzyl alcohol or its .alpha.-cyano or .alpha.-ethinyl derivative and a tetra-aryl titanate as catalyst, and heating the mixture at a temperature such that the methanol or ethanol are removed by distillation as it is formed, wherein said carboxylic acid is selected from the group consisting of
- 2,2-dimethyl-3-(2',2'-dimethylvinyl) cyclopropanecarboxylic acid;
- 2,2-dimethyl-3-(2',2'-dichlorovinyl) cyclopropanecarboxylic acid;
- 2,2-dimethyl-3-(2'-ethylvinyl) cyclopropanecarboxylic acid;
- 2,2-dimethyl-3-(2',2'-dibromovinyl) cyclopropanecarboxylic acid;
- 2,2-dimethyl-3-(2'-chloro-2'-trifluoromethylvinyl) cyclopropanecarboxylic acid;
- and
- 2,2-dimethyl-3-(2',2'-bis(trifluoromethyl)vinyl) cyclopropanecarboxylic acid.
Dependencies are inferred from the claim text.