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Substituted phenylurea derivative, its preparation and herbicide containing the same as active constituent

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专利汇可以提供Substituted phenylurea derivative, its preparation and herbicide containing the same as active constituent专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A compound of formula I (X is Cl or Br; R
1 ,R
2 and R
3 are H or lower alkyl; A is methyl or methoxy; Y is H or halogen).
EXAMPLE: N'-3-[2-( 1-Methyl-2,2-dichlorocyclopropyl )ethoxyl]phenyl-N-methoxy- N-methylurea.
USE: A herbicide for the selective foliar treatment of wheat, effective against goose grass, green amaranth, white goose foot, wild mustard, etc.
PROCESS: A [2-(cyclopropyl)ethyoxy]aniline derivative of formula II is reacted with an N,N-dimethylcarbamyl chloride or N-methoxy-N-methylcarbamyl chloride in an organic solvent, e.g. benzene, in the presence of a deacidifying agent, e.g. pyridine, to give the compound of formula I. The reaction temperature is 0W150°C. The starting raw material compound of formula II is obtained by reducing a compound of formula III with platinum dioxide, etc.
COPYRIGHT: (C)1981,JPO&Japio,下面是Substituted phenylurea derivative, its preparation and herbicide containing the same as active constituent专利的具体信息内容。

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