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Abstract

The invention relates to new plant growth regulating compositions, which contain as active agent 0.001 to 95% by weight of one or more compound(s) of the general formula (I), ##STR1## wherein R.sup.1 and R.sup.2 each represent hydrogen atom, a C.sub.1-5 alkyl group, a C.sub.5-7 cycloalkyl group, an aryl group, a halogen-substituted aryl group, an aralkyl group, a C.sub.2-5 alkenyl group or a C.sub.2-5 alkynyl group, or R.sup.1 and R.sup.2 form, together with the adjacent nitrogen atom, a morpholino, pyrrolidino, piperidino or perhydroazepinyl group, and R.sup.3 stands for hydrogen or a C.sub.1-5 alkyl group, together with an inert, solid, liquid and/or gaseous carrier or diluent, and optionally one or more additives, such as surfactants or other substances of plant biological activity. The compounds of the general formula (I) in which R.sup.1 is hydrogen and R.sup.2 stands for hydrogen, C.sub.1-3 alkyl, aralkyl or C.sub.3-5 alkenyl group, furthermore in which R.sup.1 and R.sup.3 are hydrogen and R.sup.2 is an aryl group have already been described in the literature, whereas the remaining derivatives of the general formula (I) are new. These compounds can be prepared by reacting a compound of the general formula (II) ##STR2## with an amine of the general formula (III), ##STR3## or by alkylating a compound of the general formula (IV). ##STR4## In the above formulae X stands for halogen, hydroxy or C.sub.1-4 alkoxy, whereas R.sup.1, R.sup.2 and R.sup.3 have the meanings as defined above.

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First Claim