| abstract |
ABSTRACT Novel 2-formyl-3,3-dimethylcyclopropylacetic acid, its esters, salts or dialkylacetals are prepared by a process which comprises ozonolysis of 3-acetyl-6,6-dimethylbicyclo [3.1.0]-2-hexene, reductive cleavage of the ozonide product thus found, and optionally converting the free acid into an ester, a salt or a dialkyl acetal. The acetic acid derivative is an inter-mediate in the manufacture of pyrethroid insecticides. The bicyclohexene starting material is preferably obtained from the naturally-occurring terpene (+)-3-carene. |