Patent · US Expired

2,2-Dimethyl-3-(2-bromo-2-phenyl-vinyl)-cyclopropanecarboxylic acid 3-phenoxybenzyl esters and pesticidal use

US4279920A · kind A · utility

1Cited by

4References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Rainer Fuchs · Halver, DE
Hellmut Hoffmann
Ingeborg Hammann · Cologne, DE
Bernhard Homeyer · Leverkusen, DE
Wilhelm Stendel · Wuppertal, DE

Key dates

Filing date	Sep 10, 1979
Grant date	Jul 21, 1981
Priority date	—
Expiry date	Sep 10, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/4056
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

2,2-Dimethyl-3-(2-bromo-2-phenyl-vinyl)-cyclopropanecarboxylic acid 3-phenoxybenzyl ester of the formula ##STR1## which possess arthropodicidal properties. In addition, the new intermediate of the formula ##STR2## is produced by reacting an .alpha.-bromo-benzyl-phosphonic acid ester of the formula ##STR3## in which R.sup.6 each independently is alkyl or phenyl, or the two radicals R.sup.6 together are alkanediyl, with a 3-formyl-2,2-dimethyl-cyclopropanecarboxylic acid ester and saponifying. Also the compounds of the formula ##STR4## which are new when R.sup.1 is not alkyl, are produced by reacting triphenylphosphine and bromine to form dibromo-triphenylphosphorane, and reacting the dibromo-triphenylphosphorane without isolation with an .alpha.-hydroxy-benzyl-phosphonic acid ester of the formula ##STR5##

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.