titleOfInvention |
Process for converting 2,2-dimethyl-3R- (2,2-dihalovinyl) -cyclopropane-1R-carboxylic acid R-alpha-cyano-3-phenoxybenzyl ester or mixtures thereof with the alpha-S ester with more than 50% of The R form of the racemic 2,2-dimethyl-3R- (2,2-dihalovinyl) -cyclopropane-1R-carboxylic acid R, S-alpha-cyano-3-phenoxybenzyl ester |