Substituted benzoyl cyclic enone, process for preparation, and herbicide
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United States of America Patent
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Jun 11, 1996
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N/A
app pub date -
Jan 14, 1994
filing date -
Mar 18, 1993
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Abstract
Compounds represented by general formula (I), herbicides or selective herbicides for paddy field containing said compounds as active ingredients, method of controlling growth of undesirable plants by applying the herbicides on places where control is desired. ##STR1## wherein A represents a --S(O)nR.sup.1 in which n is 0 or 2 and R.sup.1 represents a (substituted) lower alkyl; a cycloalkyl; a (substituted) benzyl; a (substituted) phenyl; or a --OR.sup.2 in which R.sup.2 represents a (substituted) phenyl; B represents a halogen, a nitro, a lower alkyl, or a lower alkylsulfonyl; D represents a hydrogen, a lower alkyl, a lower alkoxy, a lower alkoxymethyl, or a lower alkoxycarbonyl; E represents a halogen, a (substituted) lower alkoxy, a lower alkylthio, a (substituted) lower alkylsulfonyl, or a lower alkylsulfonyloxy. The herbicides of the present invention can prevent a wide variety of noxious weeds and further selectively prevent weeds on paddy field with considerably reduced phytotoxicities on rice plant.
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