Preparation of cyclopropane-carboxylic acid derivatives and intermediates therefor
Patent 4305885 Issued on December 15, 1981. Estimated Expiration Date: 
June 27, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 27, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3281472 3445499 3578717 3853952 InventorsApplicationNo. 06/163761 filed on 06/27/1980US Classes:558/366, Three- or four-membered monocyclic ring formed558/434, Three-membered alicyclic ring containing560/118, Two rings only in acid moiety560/124, Cyclopropyl in acid moiety560/8, Aromatic acid moiety568/34, Plural rings containing568/35Plural halogens containingExaminersPrimary: Torrence, Dolph H.Attorney, Agent or FirmInternational ClassesC07C 315/00 (20060101)C07C 317/00 (20060101) C07C 317/04 (20060101) Foreign Application Priority Data1979-07-02 DEAbstractA perfluoroalkane-sulphinic acid of the formula RF --SO2 H is reacted with a diene at -20° to +20° C. to form the new intermediate ##STR1## in which R3 -R8 are hydrogen or various organic radicals or double bonds, and that is reacted with a ଲ,ଲ-dimethyl-acrylic acid derivative of the formula ##STR2## in the presence of a base at a temperature between about -20° and +30° C. to produce a cyclopropane carboxylic acid derivative of the formula ##STR3## in which Z is alkoxycarbonyl or cyano and R1 and R2 are hydrogen or various organic radicals. The products are known intermediates for insecticides. |
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