.beta.-amino-.alpha.-cyanoacrylates and their use as herbicides

Details .beta.-amino-.alpha.-cyanoacrylates and their use as herbicides .beta.-amino-.alpha.-cyanoacrylates and their use as herbicides

C - Chemistry, Metallurgy

07

C

C07C 255/23 (2006.01) A01N 37/34 (2006.01) A01N 37/42 (2006.01) A01N 37/44 (2006.01) A01N 43/08 (2006.01) A01N 43/16 (2006.01) A01N 43/18 (2006.01) C07C 255/30 (2006.01) C07C 255/31 (2006.01) C07C 323/58 (2006.01) C07D 307/14 (2006.01) C07D 307/16 (2006.01) C07D 309/04 (2006.01) C07D 309/06 (2006.01) C07D 309/20 (2006.01) C07D 335/02 (2006.01)

Patent

CA 2470156

.beta.-Amino-.alpha.-Cyanoacrylates of formula I where the variables have the following meanings: R1 is n-alkyl, n-alkenyl or alkoxyalkyl; R2,R3 are alkyl, which may be partially or fully halogenated and/or may carry a substituent from the group consisting of cyano, alkoxy, haloalkoxy, alkylthio, haloalkylthio, C1-C6-alkylsulfinyl, haloalkylsulfinyl, alkylsulfonyl and haloalkylsulfonyl, are alkenyl or alkynyl; or R2 and R3 together with the carbon atom to which they are attached form a cycloalkyl ring in which one or two nonadjacent CH2 groups may be replaced by oxygen or sulfur, and where the cycloalkyl ring may be substituted by halogen or alkyl; R4 is hydrogen, halogen, cyano or alkyl, where the substituents R2, R3 and R4 or two of the radicals R2, R3 and R4 are not simultaneously methyl, 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.

La présente invention concerne des .beta.-amino-.alpha.-cyanoacrylates de formule (I) dans laquelle : R?1¿ représente n-alkyle, n-alcényle ou alcoxyalkyle ; R?2¿, R?3¿ représentent alkyle, pouvant être partiellement ou totalement halogéné et/ou pouvant porter un substituant du groupe constitué de cyano, alcoxy, haloalcoxy, alkylthio, haloalkylthio, alkylsulfinyle en C¿1?-C¿6?, haloalkylsulfinyle, alkylsulfonyle et haloalkylsulfonyle, représentent alcényle ou alcynyle ; ou R?2¿ et R?3¿ ensemble avec l'atome de carbone auquel ils sont liés forment un noyau dans lequel un ou deux groupes CH¿2? non adjacents peuvent être substitués par l'oxygène ou le soufre, et où le noyau cycloalkyle peut être substitué par halogène ou alkyle ; R?4¿ représente hydrogène, halogène, cyano ou alkyle, où les substituants R?2¿, R?3¿ et R?4¿ ou deux des radicaux R?2¿, R?3¿ et R?4¿ ne sont pas simultanément méthyle, et leurs sels utiles en agriculture. L'invention concerne également des procédés et des intermédiaires pour leur préparation; et l'utilisation desdits composés ou de compositions contenant lesdits composés pour le contrôle de végétaux indésirables.

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