59552-69-1Relevant academic research and scientific papers
Piperazine Compounds Whith a Herbicidal Action
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Page/Page column 23, (2010/06/22)
The present invention relates to piperazine compounds of the general formula I defined below and to their use as herbicides. Moreover, the invention relates to compositions for crop protection and to a method for controlling unwanted vegetation. In formula I, the variables have the following meanings: R1 is selected from the group consisting of halogen, cyano, nitro, Z—C(═O)—R11, phenyl and a 5- or 6-membered heterocyclic radical which has 1, 2, 3 or 4 heteroatoms selected from the group consisting of O, N and S as ring atoms, where phenyl and the heterocyclic radical are unsubstituted or may have 1, 2, 3 or 4 substituents R1a; Z is a covalent bond or a CH2 group;R11 is hydrogen, C1-C6-alkyl, C3-C6-cycloalkyl, C2-C6-alkenyl, C5-C6-cycloalkenyl, C2-C6-alkynyl and the like;R2 is hydrogen, halogen, nitro, cyano, C1-C4-alkyl, C1-C4-haloalkyl, C2-C4-alkenyl, C1-C4-alkoxy, C1-C4-haloalkoxy, benzyl or a group S(O)nR21 in which R21 is C1-C4-alkyl or C1-C4-haloalkyl and n is 0, 1 or 2;R3 is hydrogen or halogen;R4 is C1-C4-alkyl, C3-C4-alkenyl or C3-C4-alkynyl; R5 is hydrogen, C1-C4-alkyl, C3-C4-alkenyl, C3-C4-alkynyl or a group C(═O)R51 in which R51 is hydrogen, C1-C4-alkyl, C1-C4-haloalkyl, C1-C4-alkoxy or C1-C4-haloalkoxy;R6 is C1-C4-alkyl, C1-C4-hydroxyalkyl or C1-C4-haloalkyl;R7, R8 independently of one another are hydrogen, OH, C1-C4-alkoxy, C1-C4-haloalkyloxy, C1-C4-alkyl or C1-C4-haloalkyl; andR9, R10 independently of one another are selected from the group consisting of hydrogen, halogen, CN, NO2, C1-C4-alkyl, C1-C4-haloalkyl, C2-C4-alkenyl, C1-C4-alkoxy and C1-C4-haloalkoxy.
Piperazine Compounds Having Herbicidal Action
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Page/Page column 22, (2010/07/10)
The present invention relates to piperazine compounds of the general formula I defined below and to their use as herbicides. Moreover, the invention relates to compositions for crop protection and to a method for controlling unwanted vegetation. R1 is selected from the group consisting of halogen, cyano, nitro, Z—C(=O)—R12, phenyl and a 5- or 6-membered heterocyclic radical which has 1, 2, 3 or 4 heteroatoms selected from the group consisting of O, N and S as ring atoms, where phenyl and the heterocyclic radical are unsubstituted or may have 1, 2, 3 or 4 substituents R1a; Z is a covalent bond or a CH2 group; R12 is hydrogen, C1-C6-alkyl, C3-C6-cycloalkyl, C2-C6-alkenyl, C5-C6-cycloalkenyl, C2-C6-alkynyl and the like; R2 is hydrogen, halogen, nitro, cyano, C1-C4-alkyl, C1-C4-haloalkyl, C2-C4-alkenyl, C1-C4-alkoxy, C1-C4-haloalkoxy, benzyl or a group S(O)nR21 in which R21 is C1-C4-alkyl or C1-C4-haloalkyl and n is 0, 1 or 2; R3 is hydrogen or halogen; R4 is C1-C4-alkyl, C3-C4-alkenyl or C3-C4-alkynyl; R5 is hydrogen, C1-C4-alkyl, C3-C4-alkenyl, C3-C4-alkynyl or a group C(=O)R51 in which R51 is hydrogen, C1-C4-alkyl, C1-C4-haloalkyl, C1-C4-alkoxy or C1-C4-haloalkoxy; R6 is C1-C4-alkyl, C1-C4-hydroxyalkyl or C1-C4-haloalkyl; R7, R8 independently of one another are hydrogen, OH, C1-C4-alkoxy, C1-C4-haloalkyloxy, C1-C4-alkyl or C1-C4-haloalkyl; R9, R10 independently of one another are selected from the group consisting of hydrogen, halogen, CN, NO2, C1-C4-alkyl, C1-C4-haloalkyl, C2-C4-alkenyl, C1-C4-alkoxy and C1-C4-haloalkoxy; and R11 is hydrogen or C1-C4-alkyl; and the agriculturally useful salts of these compounds.
Synthesis and phytotoxicity of structural analogues of thaxtomin natural products
Molesworth, Peter P.,Gardiner, Michael G.,Jones, Roderick C.,Smith, Jason A.,Tegg, Robert S.,Wilson, Calum
, p. 813 - 820 (2011/08/03)
Structural analogues of the phytotoxic thaxtomin natural products have been synthesized by building upon a piperazinedione core and from l-phenylalanine. The compounds were evaluated for their phytotoxic activity against Arabidopsis thaliana seedlings and some of the key features for activity have been identified. CSIRO 2010.
A photochemical approach to phenylalanines and related compounds by alkylation of glycine
Knowles, Haydn S.,Hunt, Keith,Parsons, Andrew F.
, p. 8115 - 8124 (2007/10/03)
Phenylalanines can be prepared on UV photolysis of protected glycines in the presence of di-tert-butyl peroxide, substituted toluenes and the photosensitiser benzophenone. These reactions, which lead to highly selective mono-alkylation at the α-position of glycines, involve coupling of captodative α-glycine radicals with benzyl radicals. This method can be used to selectively alkylate a variety of glycine derivatives using a range of substituted toluenes under neutral reaction conditions.
Photochemical alkylation of glycine leading to phenylalanines
Knowles,Hunt,Parsons
, p. 7121 - 7124 (2007/10/03)
UV photolysis of protected glycines in the presence of di-tert-butyl peroxide, benzophenone and substituted toluenes is shown to lead to selective alkylation at the α-position. Phenylalanines are isolated in yields of generally > 50% (based on recovered s
