C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
167/12, 260/477,
C07C 69/757 (2006.01) A01N 53/00 (2006.01) C07C 62/34 (2006.01) C07D 317/46 (2006.01) C07D 317/60 (2006.01) C07D 319/20 (2006.01) C07F 9/40 (2006.01)
Patent
CA 1161051
ABSTRACT A process for the preparation of a 3-(2-aryl-vinyl)-2,2- dimethyl-cyclopropane-l-carboxylic acid ester of the formula Image in which Ar is an aromatic radical, R is alkyl or the radical of an alcohol customary in pyrethroids, and R1 is hydrogen or halogen, comprising reacting a 1-aryl-4-methyl-penta-1,3-diene of the formula Image with a diazoacetic acid ester of the formula N2CH-Coo-R at a temperature from about 50 to 200°C and in the presence of a copper-containing catalyst. The 1-aryl-4-methyl-penta-1,3- diene starting materials are new and can be prepared by novel processes.
350240
Fuchs Rainer
Hammann Ingeborg
Stendel Wilhelm
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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