Synthesis and herbicidal activities of .ALPHA.-isocyanocycloalkylideneacetamides.

Various α-isocyanocycloalkylideneacetamides were synthesized by the reaction of isocyanoacetamides with ketones and following by dehydration. These compounds were examined for their inhibitory activity against the germination of rice, cucumber and radish seeds, and for their herbicidal effects on rice, tomato and weed seedlings. Among them, α-isocyanocyclohexylidene-acetylpiperidine showed selective herbicidal activity against the broad-leaf plants.