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US 4,298,756 AGranted
1R, Cis 2,2-dihalovinyl-3,3-dimethylcyclopropylmethanol and ester derivatives
AssigneeShell Oil Company
InventorsPieter A. Verbrugge, Petrus A. Kramer
Life of this patent
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Abstract
Preparation of novel alkyl 2,2-dihalovinylcyclopropylacetates (intermediates in the preparation of insecticides) by reaction of a phosphine with a compound generating a dihalocarbene and reaction of the product resulting therefrom with an alkyl formylcyclopropylacetate, both reactions being carried out in a solvent.
Claims5
A (1R,cis) compound of the formula:
- ##STR11## wherein R is an alkyl group containing from 1 to 4 carbon atoms and Hal.sub.2 is two halogen atoms having an atomic number from 9 to 35.
A (1R,cis) 2-(2,2-dihalovinyl)-3,3-dimethylcyclopropylmethanol wherein each halo represents a halogen atom having an atomic number of from 9 to 35, inclusive.
Dependencies are inferred from the claim text.