发明名称 PROCESS FOR THE PREPARATION OF 1-CARBAMOYL-3-(3,5-DICHLOROPHENYL)-HYDANTOIN, AND 1-CHLOROCARBONYL-3-(3,5-DICHLOROPHENYL) HYDANTOIN AS INTERMEDIATE IN THIS PROCESS
摘要 1. Process for the manufacture of N-substituted 1-carbamoyl-3-(3,5-dichlorophenyl)-hydantoins of the formula: <IMAGE> (I) in which R1=alkyl (C1-C4) or phenyl and R2=H or alkyl (C1-C4). 2. This process comprises two steps: a. reacting phosgene with 3-(3,5-dichlorophenyl)-hydantoin in an inert organic solvent medium, in the presence of an acid acceptor, in order to form 1-chlorocarbonyl-3-(3,5-dichlorophenyl)-hydantoin, and b. reacting the chlorocarbonyl formed with an amine HNR1R2 in an inert organic solvent, in the presence of an acid acceptor. 3. This process makes it possible to obtain the products I, which can be used as agricultural fungicides, with good yields.
申请公布号 DE3165038(D1) 申请公布日期 1984.08.30
申请号 DE19813165038 申请日期 1981.05.22
申请人 RHONE-POULENC AGROCHIMIE 发明人 GROS, GEORGES;MOLIN, MARC
分类号 A01N47/08;C07D233/80;(IPC1-7):C07D233/80;A01N43/50 主分类号 A01N47/08
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