Patent ID: 6166247
Filing Date: 2000-12-26
Classification: C07C

Abstract:
A method for preparing a cyclopropanecarboxylic acid represented by formula (3): ##STR7## comprising catalyzing the reaction of a cyclopropanecarboxylic acid ester represented by formula (1) and a carboxylic acid represented by formula (2): ##STR8## with an alkylbenzenesulfonic acid represented by the formula: ##STR9## to produce the cyclopropanecarboxylic acid represented by formula (3) and a carboxylic acid ester represented by the formula (4): R.sub.6 COOR.sub.7,whereinR.sub.1, R.sub.2, R.sub.3 are each, independently, H, C.sub.1 - to C.sub.4 -alkyl, or phenyl,R.sub.4 is H or COOR.sub.7,R.sub.5 is H, COOR.sub.7, or COOH,R.sub.6 is H, CH.sub.3, C.sub.2 H.sub.5, or C.sub.3 H.sub.7,R.sub.7 is CH.sub.3 or C.sub.2 H.sub.5, andm+n is 5 to 15.