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5--4--477--3-4.1.0-2- 5-HALO-4-FLUORO-477-TRIMETHYL-3-OXABICYCLO4.1.0HEPTANE-2-ONES METHOD FOR THEIR PRODUCTION AND THEIR USE IN THE PRODUCTION OF CYCLOPROPANE CARBOXYLIC ACIDS
5--4--477--3-4.1.0-2- 5-HALO-4-FLUORO-477-TRIMETHYL-3-OXABICYCLO4.1.0HEPTANE-2-ONES METHOD FOR THEIR PRODUCTION AND THEIR USE IN THE PRODUCTION OF CYCLOPROPANE CARBOXYLIC ACIDS
The present invention relates to 5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo [4.1.0] heptan-2-one, a process for its preparation and its use in the preparation of cyclopropanecarboxylic acids . The present invention relates to compounds of formula (I) The compounds of the present invention are useful as intermediates in the preparation of pyrethroids.;Formula I;In this formula,;Hal is Cl, Br or I.
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