Compounds represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 each are hydrogen or a phenyl; R.sub.3 is cyano; R.sub.5 OCO- in which R.sub.5 is a lower alkyl having 1-8 carbons, cycloalkyl having 3-6 carbons, alkenyl having 2-8 carbons, alkynyl having 2-8 carbons or phenyl; R.sub.6 SO.sub.2 - in which R.sub.6 is a lower alkyl having 1-8 carbons, cycloalkyl having 3 to 6 carbons or phenyl; (R.sub.7)(R.sub.8)NCO- in which R.sub.7 and R.sub.8 each are hydrogen or a lower alkyl having 1-4 carbons, cycloalkyl having 3-6 carbons, alkenyl having 2-4 carbons or phenyl, or R.sub.7 and R.sub.8 together with the nitrogen atom to which they are attached are a 3-7 membered ring which may contain a further hetero atom; or R.sub.9 CO- in which R.sub.9 is a lower alkyl having 1-4 carbons, cycloalkyl having 3 to 6 carbons or phenyl; and R.sub.4 is hydrogen or a lower alkyl having 1-4 carbons, And salts thereof, having activity which influences plant growth, processes for making such compounds, compositions for using the compounds and methods of using the compounds to influence plant growth are disclosed.
由公式##
STR1##所代表的化合物,其中R.sub.1和R.sub.2分别是
氢或
苯基;R.sub.3是
氰基;R.sub.5 OCO-中的R.sub.5是具有1-8个
碳原子的低
碳烷基,具有3-6个
碳原子的
环烷基,具有2-8个
碳原子的
烯烃基,具有2-8个
碳原子的
炔烃基或
苯基;R.sub.6 SO.sub.2-中的R.sub.6是具有1-8个
碳原子的低
碳烷基,具有3-6个
碳原子的
环烷基或
苯基;(R.sub.7)(R.sub.8)NCO-中的R.sub.7和R.sub.8分别是
氢或具有1-4个
碳原子的低
碳烷基,具有3-6个
碳原子的
环烷基,具有2-4个
碳原子的
烯烃基或
苯基,或者R.sub.7和R.sub.8与它们连接的
氮原子一起形成一个3-7的环,该环可能含有另一个杂原子;或者R.sub.9 CO-中的R.sub.9是具有1-4个
碳原子的低
碳烷基,具有3-6个
碳原子的
环烷基或
苯基;R.sub.4是
氢或具有1-4个
碳原子的低
碳烷基,以及这些化合物的盐,具有影响植物生长的活性,公开了制备这种化合物的方法,使用这种化合物的组合物以及使用这种化合物影响植物生长的方法。