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Delta2-1,2,4-triazolin-5-one and herbicide containing the same

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专利汇可以提供Delta2-1,2,4-triazolin-5-one and herbicide containing the same专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A Δ
2 -1,2,4-triazoline-5-one expressed by formula I (R
1 is H or alkyl; R
2 is alkyl or alkenyl; R
3 is alkyloxyalkyl, alkyloxyalkyloxyalkyl, arylalkyloxyalkyl, alkenyloxyalkyl, alkylthioalkyl, etc.).
EXAMPLE: 1-( 2,4-Dichloro-5-ethoxymethoxyphenyl )-3-methyl-4-allyl-Δ
2 -1,2,4-triazolin-5-one.
USE: A herbicide capable of exhibiting improved control action particularly on weeds in the pre-emergence and initial development period.
PROCESS: A compound of formula II is reacted with a compound of formula II (Y is O or S) to give a compound of formula IV, which is then subjected to the ring closure in the presence of a base to afford a compound of formula V. The resultant compound of formula V is reacted with a compound of formula VI (Z is halogen) in the presence of a base.
COPYRIGHT: (C)1981,JPO&Japio,下面是Delta2-1,2,4-triazolin-5-one and herbicide containing the same专利的具体信息内容。

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