Patent ID: 6730804
Filing Date: 2004-05-04
Classification: C07C

Abstract:
A process for preparing a cyclopropanecarboxylate ester of a lower alcohol which comprises:heating a stirred solution of a cyclopropanecarboxylic acid and an acid catalyst in a reactor at a temperature of from 100 to 200Â° C.; adding to the bottommost part of the stirred solution a mixture of the cyclopropanecarboxylic acid and the lower alcohol or the lower alcohol alone; wherein the rate of adding is maintained at a level such that the mole ratio of the cyclopropanecarboxylic acid to the lower alcohol is maintained within the range of 2 to 1000; esterifying the cyclopropanecarboxylic acid with the lower alcohol in the presence of the acid catalyst in the reactor; and distilling off the cyclopropanecarboxylate ester together with the water of reaction and small amounts of the lower alcohol.