2-nitro-5-substituted phenylphosphinic derivative, its preparation and herbicide

Abstract

Abstract NEW MATERIAL:The titled derivative of formula I (R 1 , R 2 are lower alkyl, haloalkyl; R 3 is substituted phenyl, substituted pyridyl). EXAMPLE: Methyl 5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrophenylmethylphosphinate. USE: Herbicide for rice paddies: they show high herbicidal activity against annual and prennial weeds, especially against prennial weeds such as arrowheads. Further, their activity is prompt. PREPARATION: For example, the reaction between a dinitrobenzene derivative of formula II and a dialkyl phosphonite of formula III is effected in the presence or absence of an inert solvent such as acetonitrile, preferably at room temperature for 30minW3hr. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Yuji Hirose
• 👤 Takeo Yoshimoto
• 👤 Katsutoshi Ishikawa
• 👤 Yutaka Kubota
• 👤 Kazuo Akihiro
• 👤 Yuji Enomoto
• 👤 Yasunobu Funakoshi
• 👤 Takashi Fujita
• 👤 Sachiyoshi Hojo

Bibliographic Details