2*3*4*55TETRAHYDROO1*2*44TRIAZINEE3*55DIONE DERIVATIVE* ITS PREPARATION AND HERBICIDE CONTAINING THE SAME AS ACTIVE CONSTITUENT

摘要

NEW MATERIAL:A compound of formula I [M is H or alkali metal; R is (alkyl, alkenyl, alkynyl or cycloalkyl) which may have a substituent (halgen, lower alkoxyl, phenyl or phenoxy) or (phenyl, naphthyl, nicotinyl or isonicotinyl) which may have 1-5 substituents (lower alkyl, haloalkyl, halogen, lower alkoxyl, NO2, etc.); however, R is not CH3 when M is H]. EXAMPLE:2-Propionyloxymethyl-2,3,4,5-tetrahydro-1,2,4-triazine-3,5-dione. USE:A herbicide having a high selectivity for control of oats in wheat and an activity on pre-emergence treatment. A growth retarding agent for lawn, etc. PROCESS:A compound of formula II is reacted with a compound of formula III or a reactive derivative thereof to give the compound of formula I.