Abstract: Disclosed are compounds of Formula 1, including all geometric and stereoisomers, N-oxides, and salts thereof, wherein R1, R2, R3, R4, R5 and R6 are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling an invertebrate pest comprising contacting the invertebrate pest or its environment with a biologically effective amount of a compound or a composition of the invention.
Type:
Grant
Filed:
September 30, 2008
Date of Patent:
February 5, 2013
Assignee:
E.I. du Pont de Nemours and Company
Inventors:
Jeffrey Keith Long, Thomas Paul Selby, Ming Xu
Abstract: The present invention relates to a process process for the preparation of the compound of the formula I
where the compound of the formula III
is reacted with oxalyl chloride and the product obtained is treated with hydrazine and an alkali metal hydroxide in the aqueous phase at elevated temperature, after treatment is complete a three-phase system is produced by addition of an ether and the compound of the formula I is obtained by acidifying the middle phase.
The invention moreover relates to a polymorph of the compound of the formula I.
Type:
Grant
Filed:
January 26, 2001
Date of Patent:
July 9, 2002
Assignee:
Merckle GmbH
Inventors:
Thomas Kammermeier, Stefan Laufer, Philipp Merckle, Hans-Guenter Striegel