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Kuraray Co Ltd
Original Assignee
Kuraray Co Ltd
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Filing date
Publication date
Application filed by Kuraray Co LtdfiledCriticalKuraray Co Ltd
Priority to JP5348578ApriorityCriticalpatent/JPS54145679A/en
Publication of JPS54145679ApublicationCriticalpatent/JPS54145679A/en
USE: Paddy field herbicides having effects on broadleaf weeds and barnyard grass, without damage to rice plants, applicable immediately after the transplantation of seedlings after the second leaf period of rice plants.
PROCESS: A compound of formula II is reacted with 3-amino-1-propanol in the presence of a base, e.g. trimethylamine or pyridine, in a solvent, e.g. diethyl ether or tetrahydrofuran, at -50 to 100°C, preferably 0 to 40°C to give a compound of formula III, which is treated with a dehydrating agent, preferably sulfuric or phosphoric acid and pyridine, to give the objective compound of formula I.