Method of combating undesirable plant growth and of regulating plant

Abstract

A method of combating undesirable plant growth and of regulating plant growth, which comprises allowing a herbicidal or plant-regulating amount of a compound of the formula I ##STR1## in which R.sub.1 is SR.sub.2 ; OR.sub.2 ; O--CHR.sub.10 R.sub.2 ; N(R.sub.3) (CHR.sub.10 R.sub.4); N(R.sub.11)(CHR.sub.10 R.sub.4) or NR.sub.3 R.sub.4 ; R.sub.2 is optionally substituted C.sub.1 -C.sub.10 -alkyl C.sub.1 -C.sub.4 -haloalkyl; C.sub.3 -C.sub.8 -alkenyl; (3-methyloxetan-3-yl)methyl; C.sub.3 -C.sub.8 -alkynyl; or an optionally substituted radical from the group comprising phenyl, benzyl, C.sub.3 -C.sub.7 -cycloalkyl, furanyl or furfuryl R.sub.3 and R.sub.4 independently of one another are hydrogen; an optionally substituted phenyl or benzyl radical; C.sub.1 -C.sub.8 -alkyl; or C.sub.3 -C.sub.6 -cycloalkyl; or R.sub.3 and R.sub.4, together with the nitrogen atom, form a saturaated 5- or 6-membered heterocyclic ring which contains up to two heteroatoms from the group comprising N, O and S and can be mono- or disubstituted by C.sub.1 -C.sub.4 -alkyl; R.sub.5 is hydrogen; halogen; C.sub.1 -C.sub.8 -alkyl; C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl; nitro; cyano; C.sub.1 -C.sub.4 -haloalkoxy; phenylthio; di-C.sub.1 -C.sub.4 - alkylamino; phenyl; or is optionally substituted phenoxy; and R.sub.6 and R.sub.7 independently of one another are hydrogen; halogen; C.sub.1 -C.sub.8 -alkyl; C.sub.1 -C.sub.4 -haloalkyl; C.sub.1 -C.sub.4 -alkoxy; C.sub.1 -C.sub.4 -haloalkoxy; nitro; cyano; or di-C.sub.1 -C.sub.4 -alkylamino, and R.sub.10 and R.sub.11 independently of one another are C.sub.1 -C.sub.4 -alkyl; and salts of compounds of the formula I with acids and bases, to act on the plants or on the environment of the plants, and novel compounds of the formula I' ##STR2## process for their preparation and herbicidal or plant growth-regulating compositions containing these novel compounds.