[EN] PROCESS OF PREPARATION OF AZIMSULFURON<br/>[FR] PROCÉDÉ DE PRÉPARATION D'AZIMSULFURON
申请人:RALLIS INDIA LTD
公开号:WO2014002111A1
公开(公告)日:2014-01-03
The present disclosure provides process for preparation of azimsulfuron or its salts, isomers, and other derivatives thereof. The process involves treating a compound of formula I, (Formula I should be inserted here.) with aqueous acetic acid or formic acid and chlorine gas or sodium hypochlorite in presence of hydrochloric acid in chlorinated solvents such as dichloromethane, 1,2-dichloroethane or with aqueous acetic acid and N-chlorosuccinimide or hydrogen peroxide in presence of hydrochloric acid in aqueous cyclic ether such as tetrahydrofuran, 1,4-dioxane to obtain 1-methyl-4-(2-methyl-2H-tetrazol-5-yl)-1H-pyrazole-5-sulfonyl chloride; converting the sulfonyl chloride to a sulfonamide and treating the sulfonamide with a phenyl(4,6-dimethoxypyrimidin-2-yl) carbamate to obtain azimsulfuron or its salts, isomers, and other derivatives thereof.
本公开提供了制备阿吉磺隆或其盐、异构体和其他衍生物的方法。该方法涉及使用具有化学式I的化合物(应在此处插入化学式I)与水杨酸或甲酸和氯气或次氯酸钠在氯化溶剂(如二氯甲烷、1,2-二氯乙烷)中,在氯化溶剂中的氯化氢的存在下处理,或者与水杨酸和N-氯琥珀酰亚胺或过氧化氢在环氧乙醚(如四氢呋喃、1,4-二噁烷)中的氯化氢的存在下处理,以获得1-甲基-4-(2-甲基-2H-四唑-5-基)-1H-吡唑-5-磺酰氯;将磺酰氯转化为磺酰胺,并将磺酰胺与苯基(4,6-二甲氧基嘧啶-2-基)氨基甲酸酯处理,以获得阿吉磺隆或其盐、异构体和其他衍生物。