| 摘要 |
alpha-Cyanoacrylates of the formula I where: R<1 >is OR<a >wherein R<a >is hydrogen, substituted alkyl, branched alkyl, branched alkenyl, cycloloalkyl, heterocyclyl, aryl, phenylalkyl or alkylimino; is NR<b>R<c >wherein R<b >is hydrogen, alkyl which may be substituted, alkenyl, alkynyl; R<c >is hydrogen, alkyl which may be substituted alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl, phenylalkyl or alkylimino; or R<b >and R<c >form an alkandiyl-chain which may be substituted; or is SR<d >wherein R<d >is hydrogen, alkyl which may be substituted, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl, phenylalkyl or alkylimino; R<2 >is alkyl which may be substituted; is alkenyl or alkynyl; R<3 >is alkyl may be substituted; is alkenyl or alkynyl; R<4 >is hydrogen, halogen, cyano or alkyl; and their agriculturally useful salts, processes and intermediates for their preparation; and the use of these compounds or of compositions comprising these compounds for controlling undesirable plants are described.
|
