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US 2022/0024873 A1Published application
Preparation of sulfonamide herbicide process intermediates
AssigneeGeneva Agriscience LLC
InventorsJossian Oppenheimer, Matthias S. Ober, Mark E. Ondari
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Abstract
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 R1 is a C1-C6 alkyl, X is Cl or OH, Y is halogen, OH, or OR2, and R2 is a C1-C6 alkyl.
Claims17
A method comprising:
- combining acetonitrile, a base, and a compound of Formula V or a compound of Formula VI
- to form a compound of Formula VII,
- wherein R1 is a C1-C6 alkyl, and X is Cl or OH.
A compound comprising:
- wherein R1 is a C1-C6 alkyl, and X is Cl or OH.
Dependencies are inferred from the claim text.