| 摘要 |
<p>K 357 Novel intermediates in the manufacture of pyrethroid insecticides have the following formula: wherein X is a halogen atom, preferably chlorine or bromine. The compound preferably has the same stereochemical form as the cyclopropane ring in (+)-3-carene. The novel intermediates can be prepared by a process which comprises oxidising 1-¢2-(2,2-dihalovinyl)-3,3-dimethylcyclopropyl!-3-oxo-2-butyl acetate, The starting material is preferably derived from (+)-3-carene,</p> |
