Halogenovinyl-substituted tetra-hydrofuran-2-ones
AssigneeBayer Aktiengesellschaft
InventorsHans-Georg Heine, Armin Hubner, Willy Hartmann
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Abstract
Halogenovinyl-substituted tetrahydrofuran-2-ones of the formula ##STR1## are prepared by reacting a peracid such as peracetic, perpropionic or m-chloroperbenzoic acid with a halogenvinyl-substituted cyclobutanene of the formula ##STR2## in which R.sup.1 to R.sup.8 can be hydrogen, halogen, cyano or various organic radicals, or in pairs can make up a ring. Products wherein R.sup.3 is not hydrogen or R.sup.1 is not halogen are new. The products are useful as intermediates in making insecticides.
Claims1
A halogenovinyl-substituted tetrahydrofuran-2-one of the formula ##STR7## in which R.sup.1 and R.sup.2 each independently is hydrogen, chlorine, bromine, fluorine or alkyl or 1 to 4 carbon atoms,
- R.sup.3 is chlorine, bromine or fluorine,
- R.sup.4 is hydrogen or alkyl or 1 to 4 carbon atoms,
- R.sup.5 is hydrogen, chlorine, bromine or fluorine and
- R.sup.7 and R.sup.8 each independently is methyl or ethyl or together are --(CH.sub.2).sub.3 --, --(CH.sub.2).sub.4 -- or --(CH.sub.2).sub.5 --.
Dependencies are inferred from the claim text.