| 摘要 |
New fungicidal spiroheterocyclic compounds are described, having the general formula I, <CHEM> in which X represents O or CH2, R<1> represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl, haloalkyl, alkenyl, alkynyl, aryl or aralkyl group, R<2> or each R<2> independently represents an optionally substituted alkyl, cycloalkyl, cycloalkylalkyl, alkoxy, alkoxyalkyl, aryl or aryloxy group, or R<2> or each R<2>, together with the ring to which they are attached, represents a polycyclic hydrocarbyl group, A and B both represent a nitrogen atom, or A represents a group CR<5> and B represents a nitrogen atom or a group CR<6>, R<3>, R<4>, R<5> and R<6> each independently represent a hydrogen or halogen atom, a hydroxy or cyano group or an optionally substituted alkyl, alkenyl, alkynyl, haloalkyl, alkoxyalkyl, aralkyl, aryl, alkylamino, alkylthio or alkoxy or group, l represents an integer from 1 to 3, m represents zero or an integer from 1 to 6, and n represents zero or an integer from 1 to 3. The invention further relates to the preparation of the above spiroheterocyclic compounds, intermediates prepared during the synthesis of these compounds, compositions containing the compounds and their use as fungicides in the control of undesired plant growth. |
