Other

Dowelanco

Thomas A Olmstead

Jimmy J Tai

Gary A Roth

Jon A Orvik

James William Ringer

Karl L Krumel

Larry D Kershner

Mark Allen Hadd

Michael Allen Gonzalez

Douglas L Pearson

Dawn L Shiang

Anne P Wallin

Julie L Maurer

Ian R King

Jeff T Budd

Tim J Adaway

The present invention relates to a new improved, simplified process for the preparation of halo-4-phenoxyquinolines, whereby thionyl chloride is used as the chlorinating agent to prepare the corresponding chloroquinoline intermediate prior to the final coupling reaction, and a single, inert high boiling polyether solvent is used throughout the entire reaction procedure.

Process for the preparation of halo-4-phenoxyquinolines

2-Chlorosulfonyl-5-alkoxy[1,2,4]triazolo-[1,5-c]pyrimidine compounds, such as 2-chlorosulfonyl-5-ethoxy-7-fluoro[1,2,4]triazolo[1,5-c]pyrimidine, that are useful for the preparation of 5-alkoxy[1,2,4]triazolo [1,5-c]pyrimidine-2-sulfonamide herbicides, were prepared in an improved manner from 5-alkoxy[1,2,4]triazolo [1,5-c]pyrimidine-2(3H)-thione compounds, such as 5-ethoxy-7-fluoro[1,2,4]triazolo[1,5-c]pyrimidine-2(3H)-thione, by oxidation with hydrogen peroxide to obtain novel 2,2'-dithiobis(5-alkoxy[1,2,4]triazolo[1,5-c]pyrimidine) compounds, such as 2,2'-dithiobis (5-ethoxy-7-fluoro[1,2,4]triazolo[1,5-c]pyrimidine), and subsequent chloroxidation of these intermediate compounds.

5-alkoxy[1,2,4]triazolo[1,5-c]pyrimidine-2(3H)--thione compounds and

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Midland, MI, United States of America

Thomas A Olmstead