HYDROXYACETIC ACID AMIDE DERIVATIVE

摘要

NEW MATERIAL:The compound of formula I (R is H or CH3; R1 is alkoxy; R2 is alkyl, lower alkoxy or cycloalkyl; Ar is group of formula II, III, IV, etc.; Y is halogen or lower alkoxy). EXAMPLE:2-[4-(Benzothiazolyl-2-oxy)-phenoxy] propionic acid (N-methoxy-N- methylaminocarbonyl) methyl ester. USE:A selective herbicide. It exhibits herbicidal effect with intergenus selectivity such as strong herbicidal effect against a harmful weed cockspur-grass by application to paddy water surface in the culture of paddy rice plant and almost uninfluential to rice plant at any stages from direct sowing to transplantation. PREPARATION:The compound of formula I can be produced e.g. by reacting the compound of formula V (Hal is halogen) with the compound of formula VI optionally in a solvent in the presence of a base at 0-150 deg.C for several min -48 hr.