| 摘要 |
NEW MATERIAL:A 4H-[1,2,4]triazino[5,6-d]indole derivative expressed by formula I (R<1> and R<2> are H or lower alkyl; R<3> is H, lower alkyl, halogen or CF3; m is 1 or 2). EXAMPLE:3-Methylamino-4-methyl-4H-[1,2,4]triazono[5,6-b]indole. USE:A herbicide, having herbicidal efficacy against various weeds which become problems in foliar and soil treatment in upland field and treatment under flooded condition of paddy field without exhibiting phytotoxicity causing problems in main croups. PREPARATION:An indole derivative expressed by formula II is reacted with an amine expressed by formula II normally at 50-200 deg.C for 1-50hr to afford the aimed compound expressed by formula I. The compound expressed by formula II is obtained by reacting an isatin derivative expressed by formula IV with 4-methylthiosemicarbazide and reacting the resultant thione derivative expressed by formula V with a methylating agent in the presence of a base.
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