Herbicidal 5-(N-3,4,5,6-tetrahydrophthalimido)-cinnamic acid esters, process for their preparation and their use.

摘要

5-(N-3,4,5,6-tetrahydrophthalimido)cinnamic acid esters of the general formula I …… in which n represents 1 or 2 and the substituents have the following meanings:… R<1> represents hydrogen or fluorine,… R<2> represents halogen,… R<3> represents hydrogen, halogen or C1-C4-alkyl,… R<4> represents hydrogen, optionally substituted C1-C6-alkyl, C3-C7- cycloalkyl, C3-C6-alkenyl, C3-C6-alkynyl or benzyl,… R  represents C1-C4-alkyl,… their preparation, and herbicidal compositions containing them.