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US 4,375,557 AGranted
Process for the preparation of dihalovinylcyclopropane carboxylic acid
AssigneeShell Oil Company
InventorPetrus A. Kramer
Life of this patent
Estimating the term…
Abstract
Novel compounds of the formula I ##STR1## in which each of Y.sup.1 and Y.sup.2 independently represents a fluorine, chlorine or bromine atom and each of R.sup.1 and R.sup.2 independently represents a hydrogen atom or an alkyl group having up to 10 carbon atoms, or R.sup.1 and R.sup.2 together represent an alkylene group having from 2 to 5 carbon atoms, may be converted by the action of base into the corresponding dihalovinylcyclopropane carboxylic acids.
Claims4
A process for the preparation of a (cis)-dihalovinylcyclopropanecarboxylic acid of the formula:
- ##STR10## wherein each of Y.sup.1 and Y.sup.2 independently represents a fluorine, chlorine or bromine atom and each of R.sup.1 and R.sup.2 independently represents a hydrogen atom or an alkyl group having up to 10 carbon atoms, or R.sup.1 and R.sup.2 together represent an alkylene group having from 2 to 5 carbon atoms which comprises treating a compound of the formula ##STR11## wherein Y.sup.1, Y.sup.2, R.sup.1 and R.sup.2 have the above stated meanings, with a base.
Dependencies are inferred from the claim text.