derivatives of azaanthrachinons and azaxanthons and those containing herbicides and pflanzenwachstumsregulatoren

摘要

A process is disclosed for controlling undesirable plant growth and for regulating plant growth, by applying to the plants derivatives of azaanthraquinones and/or azaxanthones having formula (I), in which X, Y, Z and the residues R1 to R5 have the following meanings: R1 is hydrogen, methyl; R2-R5 are (a) hydrogen, (b) halogen, (c) nitro, (d) COOR6, in which R6 stands for C1-C4-alkyl, (e) CONH2 and CONR6R7, in which R6 and R7 stand for C1-C4-alkyl, (f) C1-C8-alkyl, which may bear one to three of the following substituents: halogen, hydroxy, C1-C6-alkoxy, (g) C3-C6-alkenyl, (h) C1-C4-alkoxy, (i) hydroxy, (j) amino or NR6R7, (k) phenyl, which may bear one to five halogen atoms or one to three of the following substituents: nitro, C1-C4-alkoxy, C1-C4-alkyl or C1-C4alkyl halide; X, Y are N, N+-O- or CH, with the proviso that only a nitrogen atom or a N-oxide group be contained in the ring; Z is oxygen, sulphur or a C = O group; A is oxygen or sulphur. Also disclosed are new azaanthraquinones and azaxanthones and herbicidal and bioregulatory agents containing the same.