Process for preparing dihalovinylcyclopropanecarboxylates
AssigneeSagami Chemical Research Center
InventorsKiyoshi Kondo, Kiyohide Matsui, Akira Negishi, Yuriko Takahatake
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Abstract
Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.
Claims1
A process for preparing the compound ##STR9## which comprises dehydrohalogenating ethyl 4,6,6,6-tetrachloro-3,3-dimethylhexanoate in dimethylformamide with sodium ethoxide at a temperature between about 50.degree. and 150.degree. C. to eliminate one mole of HCl and produce said compound.
Dependencies are inferred from the claim text.