Beta-phenethylphosphonic ester derivative, its preparation and herbicide containing the same as active constituent
专利汇可以提供Beta-phenethylphosphonic ester 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 formulaI[R
1 is ≥2C lower alkyl; R
2 and R
3 are H, alkyl, (phenyl)alkenyl; alkynyl, alkylthio, phenylthio or (substituted)aralkyl; however, are not H at the same time; R
4 is H or methyl; X is halogen; n is an integer 0W2].
EXAMPLE: O,O,α-Triisopropyl β-phenethylphosphonate.
USE: A selective herbicide, having powerful weeding action on a wide range of weeds by the foliar treatment after the germination with very low phytotoxicity to important crops, e.g. cotton, soybenas, rice plants, etc., and particularly exhibiting improved selectivity for cotton by the foliar treatment.
PROCESS: A β-phenethylphosphonic ester of formula II is reacted with a halide of the formula R
5 Y[R
5 is alkyl, alkynyl or (substituted)aralkyl; Y is halogen]in the presence of a base to give the compound of formulaI(R
2 and R
3 are R
5 ; or R
2 is R
5 and R
3 is H).
COPYRIGHT: (C)1982,JPO&Japio，下面是Beta-phenethylphosphonic ester derivative, its preparation and herbicide containing the same as active constituent专利的具体信息内容。
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5 液体除草制剂
