C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/491
C07C 69/16 (2006.01)
Patent
CA 1155455
K 357 ABSTRACT Novel intermediates in the manufacture of pyrethroid insecticides have the following formula:- Image 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,
331942
Shell Canada Limited
Smart & Biggar
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