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Pyridyl aminomethylenediphosphonic acid herbicide

阅读:339发布:2021-01-07

专利汇可以提供Pyridyl aminomethylenediphosphonic acid herbicide专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A compound of formula I [R
1 is OH, halogen, phenoxy group, etc.; R
2 is H or halogen; R
3 is H or aliphatic acyl group; R
4 is alkyl group; Y is N,>N→O, >N
+ RX
- (R is alkyl group; X is halogen)], and its salt.
EXAMPLE: N-[2-(3-Methylpyridyl)]-aminomethylenediphosphonic acid tetrachloride.
USE: Herbicides having very powerful herbicidal effects on treatment (foliar teatment) after germination of plants, capable of killing large weeds which hae not been destroyed.
PROCESS: A compound of formula A is reacted with PCl
5 to give a compound of formula B. Alternatively, the compound of formula A is acetylated, trimethylsilylated, and hydrolyzed to form the compound of formula C. The compound of formula I, e.g. formula D or E, can be obtained from the compound of formula A.
COPYRIGHT: (C)1980,JPO&Japio,下面是Pyridyl aminomethylenediphosphonic acid herbicide专利的具体信息内容。

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