| 摘要 |
<p>Prepn. of s-triazine derivs. (III) with plant protective activity: (where X is R-O- or R1R2N-; n is 0 or 1; R3 and R4 are opt. substd. aliphatic, aromatic or heterocyclic gps.; R is haloalkyl or opt. substd. aryl which can be combined with heterocyclic gps.; R1, R2 are opt. substd. aliphatic, aromatic or heterocyclic gps. and R1 and R2 together with N can form a ring which can contain further heteroatoms), takes place by direct ring closure reaction of novel iminocarboxylic acid derivs. X-C(Hal)=N-CO-(COO)n-R3 (I) with amidines R4C(=NH)NH2 (II) at -30 to 100 degrees C, pref. at -10 to 60 degrees c, pref. in presence of a diluent, R3 and R4 being opt. substd. aliphatic, aromatic or heterocyclic gps.</p> |
