Process for production of beta -dihalogenoethenylcyclopropane derivatives

A novel process for producing a beta -dihalogenoethenylcyclopropane derivative of the formula, wherein R1 is a hydrogen atom or an alkyl group, R3 is a hydrogen atom, lower alkyl, acyl, carboxyl or alkoxycarbonyl group and R is a hydrogen atom or a lower alkyl group and each of Y1 and Y2 is a fluori...

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Bibliographic Details
Main Authors ITAYA; NOBUSHIGE, MAGARA; OSAMU, MATSUO; TAKASHI
Format Patent
LanguageEnglish
Published 26.04.1988
Edition4
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
AGRICULTURE
ANIMAL HUSBANDRY
BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
CHEMISTRY
FISHING
FORESTRY
HUMAN NECESSITIES
HUNTING
METALLURGY
ORGANIC CHEMISTRY
PEST REPELLANTS OR ATTRACTANTS
PLANT GROWTH REGULATORS
PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF
TRAPPING
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Summary:A novel process for producing a beta -dihalogenoethenylcyclopropane derivative of the formula, wherein R1 is a hydrogen atom or an alkyl group, R3 is a hydrogen atom, lower alkyl, acyl, carboxyl or alkoxycarbonyl group and R is a hydrogen atom or a lower alkyl group and each of Y1 and Y2 is a fluorine, chlorine or bromine atom respectively, which is an acidic moiety of the useful synthetic insecticides of the pyrethrin type, which process comprises a combination of a series of sequential steps starting from alkyl 3-butenyl ketone derivative of the formula (I), which may be shown according to the following reaction scheme: According to this process, objective compound of the formula (VI) having any cis/trans ratio can be produced by selecting the reaction condition of the Stages II-1, II-2, and IV-2.
Bibliography:Application Number: US19860825966