| 摘要 |
<p>Pyrimidine compounds of the formula: <IMAGE> (I) in which R1 is alkyl, one of X1, X2, X3 is chlorine or bromine and the two others are respectively -NR1R2 and -NR3R4 in which R2 and R3 are, independently of one another, hydrogen, alkyl, cycloalkyl, aryl or aryl substituted by alkyl, hydroxy, chlorine, bromine or <IMAGE> wherein R is hydrogen or alkyl, or form together with the nitrogen atom to which they are linked a nitrogenous heterocyclic radical other than piperazino and substituted piperazino, R4 and R5 are, independently of one another, hydrogen, alkyl, cycloalkyl, aryl or aryl substituted by alkyl, hydroxy, chlorine, bromine or <IMAGE> wherein R is as defined above, or form together with the nitrogen atom to which they are linked a nitrogenous heterocyclic radical other than piperazino and substituted piperazino, at least one of the substituents -NR1R2, -NR3R4 being NH2 or <IMAGE> and their salts with mineral or organic acids, are herbicides.</p> |
