Corteva Agriscience LLC

Dow Global Technolgoies LLC

Rohm and Haas Electronic Materials Korea Ltd.

Mark E Ondari

Matthias Stefan Ober

Jossian Oppenheimer

Sukrit Mukhopadhyay

Dean M Welsh

Kyoung Moo Koh

Hong-Yeop Na

Michael Gullo

Timothy J Gallagher

Jayachandran Devaraj

Amaruka Hazari

Will Kruper

Improved methods for preparing chemical precursors to sulfonyl chloride III, which are important intermediates in the preparation of pyroxsulam herbicide, are provided. Also provided are compounds of Formula III, Formula VII, and IV, wherein Ris a C-Calkyl, X is Cl or OH, Y is halogen, OH, or OR, and Ris a C-Calkyl.

Preparation of sulfonamide herbicide process intermediates

Improved methods for preparing chemical precursors to sulfonyl chloride III, which are important intermediates in the preparation of pyroxsulam herbicide are provided. Specifically, these precursors are compounds of Formulas VII and/or VIII, and IX, wherein R is a C-Calkyl, Ris a C-Calkyl, X is Cl or OH, Y is halogen, OH, or OR, and Ris a C-Calkyl. 

Provided is a composition comprising one or more phenanthroquinazoline-core compounds having structure (I) wherein each of Rand Ris independently a substituted or unsubstituted phenyl group.

Phenanthroquinazoline-core compounds

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Freeland, MI, United States of America

Mark E Ondari