| 摘要 |
NEW MATERIAL:The compound of formula I (R<1> is lower alkyl; R<2> is H, >=2C lower alkyl, haloalkyl or phenyl; X is lower alkyl, lower alkoxy, nitro or halogen; n is 0-2; excluding the case that n=0, R<1> is methyl and R<2> is H). EXAMPLE:N-(alpha-methylbenzyl)-4'-ethylbenzamide. USE:A herbicide effective especially against annual weeds in paddy field, e.g. barnyard grass, umbrella plant, monochoria, false pimpernel, etc. It is also useful for the control of greater-duckweed and algae and has no phytotoxicity. PREPARATION:The compound of formula I can be produced by reacting the compound of formula II with the compound of formula III (Z is halogen) is a solvent in the presence of an acid acceptor (e.g. triethylamine) at -20-+50 deg.C.
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