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 C1-C6 alkyl, R1 is a C1-C6 alkyl, X...

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Hauptverfasser:	KRUPER WILL, OBER MATTHIAS S, DEVARAJ JAYACHANDRAN, HAZARI AMARUKA, OPPENHEIMER JOSSIAN, GULLO MICHAEL, ONDARI MARK E
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:	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 C1-C6 alkyl, R1 is a C1-C6 alkyl, X is Cl or OH, Y is halogen, OH, or OR2, and R2 is a C1-C6 alkyl. 提供了用于制备磺酰氯III的化学前体的改进方法，这些化学前体是啶磺草胺除草剂制备中的重要中间体。具体地，这些前体是具有式VII和/或VIII以及IX的化合物，其中R是C1-C6烷基，R1是C1-C6烷基，X是Cl或OH，Y是卤素、OH或OR2，并且R2是C1-C6烷基。