Alditol derivative esters of triclopyr , processes for their preparation and herbicidal compositions containing them
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0247721A1
公开(公告)日:1987-12-02
Herbicidal trichlopyr derivatives of the general formula
in which Z represents
R1 and R2 are each independently H, a C1-C6, straight chain or branched alkyl group, or a cycloalkyl group, or a phenyl group optionally mono or di-substituted by any of halogen, CF3, nitro, phenyl, phenoxy, phanylthio, C1-C3 alkylamino, diC1-C3 alkyl amino, C1-C3 alkyl, C1-C3 alkoxy, or C1-C3 alkylthio, or wherein R1 and R2 together are a divalent polymethylene group (CH2)n, thereby forming a carbocyclic ring having n+1 carbon atoms wherein n is 3, 4, 5 or 6, R3 is H or a group of the formula:
R4 ist H, CH2OH or a group of formula VI, and m is 1 or 2 are prepared by reacting a compound of the formula YX, wherein Y is a group of formula V and X is hydroxy, halogen or the residue of an alcohol, with a compound of the general formulae I, II, III or IV wherein Y is hydrogen.
通式为 Trichlopyr 的除草衍生物
其中 Z 代表
R1和R2各自独立地为H、C1-C6、直链或支链烷基、或环烷基、或任选被卤素、CF3、硝基、苯基、苯氧基、苯硫基、C1-C3烷基氨基、二C1-C3烷基氨基中的任何一种单取代或二取代的苯基、C1-C3烷基、C1-C3烷氧基或 C1-C3 烷硫基,或其中 R1 和 R2 共同为二价多亚甲基 (CH2)n,从而形成具有 n+1 个碳原子的碳环,其中 n 为 3、4、5 或 6,R3 为 H 或式中的基团:
R4是H、CH2OH或式VI的基团,m是1或2,通过将式YX的化合物(其中Y是式V的基团,X是羟基、卤素或醇的残基)与通式I、II、III或IV的化合物(其中Y是氢)反应制备。