| 摘要 |
PROBLEM TO BE SOLVED: To readily obtain an unknown herbicidal thiocarbamoyltetrazolinone having high herbicidal effect and useful as a herbicide. SOLUTION: This herbicide is represented by formula I (R<1> is an alkyl, an alkenyl; R<2> and R<3> are each R<1> or incorporate together with N atoms to form a ring), typically 1-phenyl-4-(N-cyclohexyl-N-ethylthiocarbamoyl)-5-(4H)- tetrazolinone. This compound is prepared by reaction of a compound of formula II such as 1-phenyl-5-(4H)-tetrazolinone with a compound of formula III (hal is a group to be eliminated) such as N-cyclohexyl-ethylthiocarbamoyl chloride usually in an inactive organic solvent such as hexane or acetonitrile, preferably at 0-80 deg.C under normal pressure. The compound of formula I can expand its application range as a selective herbicide, when it is mixed with a chemical injury-reducing agent such as 1-(α,α-dimethylbenzyl)-3-p-tolylurea.
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