| 摘要 |
Compounds of the general formula
<CHEM>
wherein A is an optionally substituted heterocycle;
R, R2 and R3 are independently H or CH3;
R1 is H F, Cl, Br, CH3, OCH3, CF3 or NO2;
R4 is
<CHEM>
X is CH3, OCH3 or Cl:
Y is H, CH3, C2H5, OCH3, OC2H5, CH2OCH3, NH2, NHCH3 or N(CH3)2;
Y1 is H, Cl, CH3 or OCH3; and
Z is CH, CCH3 or N;
and agriculturally suitable salts thereof:
exhibit herbicidal and plant growth regulant activities. The novel compounds may be formulated for use in conventional manner.
<??>The compounds can be prepared by reacting a desired heterocyclic amine HNRA with a corresponding carboxylic ester starting material, e.g. the methyl ester, in the presence of a suitable catalyst such as trimethyl-aluminum.
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