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Preparation of delta2-1,2,4-triazolin-5-ones

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专利汇可以提供Preparation of delta2-1,2,4-triazolin-5-ones专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:Δ
2 -1,2,4-Triazoline-5-ones of formula I (R
1 is 1W4C alkyl; R
2 is 1W12C alkyl, 2W6C alkoxyalkyl, 2W4C alkenyl, etc.; X is H, halogen, OH, 1W4C alkyl, 1W6C alkoxy, etc.).
EXAMPLE: 1-( 2, 4-Dichloro-5-isopropoxyphenyl )-3-methyl-4-allyl-Δ
2 -1, 2, 4-triazolin-5-one.
USE: Herbicide having excellent controlling effect especially to the weed before sprouting or at the initial stage of growth.
PROCESS: The compound of formula I is prepared by reacting a novel comound of formula II with a compound of formula III (Z is halogen or R
2 Z is acetic anhydride) in an inert solvent in the presence of a base. The compound of formula II is prepared by reacting a compound of formula IV with a compound of formula V, and cyclizing the resulting compound of formula VI.
COPYRIGHT: (C)1981,JPO&Japio,下面是Preparation of delta2-1,2,4-triazolin-5-ones专利的具体信息内容。

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