Srm Chemical, Ltd. Co.

R. T. Alamo Venture I LLC

Stephan Kwiatkowski

Lowell J Lawrence

Paul D Smith

Steven G Mobley

Terry L Johnson

Rodney Eisenberg

Sudarsan Mukhopadhyay

Maya Siddidqui

A high-yield, 4-step synthesis for flosequinan

Method of synthesizing flosequinan from 4-fluoroanthranilic acid

A simple and inexpensive process is described for reducing the concentration of N-nitroso-containing compounds in compositions comprising N-nitroso-containing compounds and other desired compounds wherein the N-nitroso-containing compounds thermally decompose at a temperature below the decomposition temperature of the desired compounds. For compositions comprising dinitroaniline herbicides wherein the N-nitroso compound is a N-nitroso derivative of a precursor in the manufacture of the herbicide, for example Flumetralin, N-ethyl-N-(2-chloro-6-fluorobenzyl)-2,6-dinitro-4-trifluoromethylaniline, the process requires heating the mixture to a temperature greater than about 120.degree. C., and holding the composition at that temperature for a time effective to decompose the N-nitroso compound present in the mixture. Volatile decomposition products are advantageously removed from the composition.

Process for removing N-nitroso compounds from organo-amine compositions

This invention relates to pendralin �2,6-dinitro-N-(1-ethylpropyl)-4-tert-butylaniline!, preemergence and postemergence herbicidal methods and herbicidal compositions employing pendralin.

A2,6-dinitroaniline herbicide

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Lexington, KY, United States of America

Stephan Kwiatkowski