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Kuraray Co Ltd
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Kuraray Co Ltd
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Publication date
Application filed by Kuraray Co LtdfiledCriticalKuraray Co Ltd
Priority to JP5348278ApriorityCriticalpatent/JPS54145653A/en
Publication of JPS54145653ApublicationCriticalpatent/JPS54145653A/en
NEW MATERIAL:A compound of formula I: (Two X's are halogens).
USE: Paddy field herbicides having improved control effects on broadleaf weeds, and little damage to rice plants, showing the best effect within the second leaf period after germination of weeds.
PROCESS: The compound is prepared by the following four methods: (1) A com- pound of formula II is reacted with pyrrolidine of formula III in the presence of a base, e.g. trimethylamine or pyridine, at-50 to 100°C. (2) The reaction is carried out under the same conditions as in (1) except that pyrrolidine connot be used as a base. (3) A compoud of formula IV is reacted with a compound of formula V in a solvent at-50 to 100°C. (4) A compound of formula VI: (X is formula I is reacted with a compound of formula VII in a solvent at 30 to 300°C. Diethyl ether, THF, or benzene may be cited as the solvent.