Production of insecticidally active vinyl-cyclopropane carboxylic acid esters
AssigneeBayer Aktiengesellschaft
InventorsHans-Georg Heine, Willy Hartmann
Life of this patent
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Abstract
Insecticidally active vinyl-cyclopropane carboxylic acid esters of the formula ##STR1## are prepared by reacting ##STR2## in which R.sup.12 is a radical selected from the group consisting of ##STR3## with an alcoholate of the formula M--O--R.sup.8. Various processes for making the intermediates are also described. Many of the intermediates and end products are new.
Claims7
An .alpha.-halogenocyclobutanone of the formula ##STR28## in which R.sup.1, R.sup.2 and R.sup.3 each independently is hydrogen, halogen, CN, optionally substituted alkyl or alkenyl, aralkyl, aryl, alkoxycarbonyl, alkylsulphonyl, arylsulphonyl, acyloxy or dialkylaminocarbonyl, at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 containing halogen,
- R.sup.4, R.sup.5, R.sup.6 and R.sup.7 each independently is hydrogen, optionally substituted alkyl or alkenyl, halogen, CN, aralkyl or aryl, or any of the pairs R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.1 and R.sup.4, R.sup.4 and R.sup.5, R.sup.4 and R.sup.7 and R.sup.5 and R.sup.6, conjointly with the adjacent carbon atom or atoms form a carbocyclic ring with up to 8 ring carbon atoms, and
- Hal is halogen.
A cyclobutanone of the formula ##STR29## in which R.sup.1, R.sup.2 and R.sup.3 each independently is hydrogen, halogen, CN, optionally substituted alkyl or alkenyl, aralkyl, aryl, alkoxycarbonyl, alkylsulphonyl, arylsulphonyl, acyloxy or dialkylaminocarbonyl, at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 containing halogen, and
- R.sup.4, R.sup.5, R.sup.6 and R.sup.7 each independently is hydrogen, optionally substituted alkyl or alkenyl, halogen, CN, aralkyl or aryl, or any of the pairs R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.1 and R.sup.4, R.sup.4 and R.sup.5, R.sup.4 and R.sup.7 and R.sup.5 and R.sup.6, conjointly with the adjacent carbon atom or atoms form a carbocyclic ring with up to 8 ring carbon atoms.
Dependencies are inferred from the claim text.