Process for the preparation of (3-fluoropyridin-2-yloxy)phenoxypropionic
acids
    5.
    发明授权
    Process for the preparation of (3-fluoropyridin-2-yloxy)phenoxypropionic acids 失效
    制备(3-氟吡啶-2-基氧基)苯氧基丙酸的方法

    公开(公告)号:US5274100A

    公开(公告)日:1993-12-28

    申请号:US974778

    申请日:1992-11-12

    CPC classification number: C07D213/643 C07D213/73

    Abstract: (3-Fluoropyridin-2-yloxy)phenoxypropionic acids of formula I ##STR1## wherein X is hydrogen, fluoro, chloro, bromo or trifluoromethyl and Y is hydrogen, sodium or potassium, are prepared by reacting a compound of formula II ##STR2## wherein X and Y are as defined for formula I, in an anhydrous mixture of hydrogen fluoride, dimethylsulfoxide and a diazotising agent under normal pressure, and converting the diazonium fluoride so produced by thermal decomposition into the (3-fluoropyridin-2-yloxy)phenoxypropionic acid of formula I.

    Abstract translation: 式(I)的(3-氟吡啶-2-基氧基)苯氧基丙酸其中X是氢,氟,氯,溴或三氟甲基,Y是氢,钠或钾,是通过使式II化合物 其中X和Y如式I所定义,在常压下在氟化氢,二甲基亚砜和重氮化剂的无水混合物中,将通过热分解产生的重氮化合物转化为(3-氟吡啶) -2-氧基)苯氧基丙酸。

    Process for the preparation of fluorinated pyridine derivatives
    7.
    发明授权
    Process for the preparation of fluorinated pyridine derivatives 失效
    制备氟化吡啶衍生物的方法

    公开(公告)号:US4831148A

    公开(公告)日:1989-05-16

    申请号:US784017

    申请日:1985-10-04

    CPC classification number: C07D213/643 C07D213/61 C07D213/73

    Abstract: In accordance with a novel process, 2,3-difluoropyridines of formula I ##STR1## wherein X is halogen or trifluoromethyl, are prepared by diazotising a 3-amino-2-halopyridine of formula II ##STR2## wherein X is as defined for formula I and Y is bromine, chlorine or fluorine, in the presence of hydrogen fluroide, to give a 3-fluoro-2-halopyridine of formula III ##STR3## wherein X and Y are as defined for formula II, and treating resultant 3-fluoro-2-halopyridines of formula III, wherein Y is bromine or chlorine, with a fluorinating agent.The 2,3-difluoropyridines prepared by the novel process are valuable intermediates for the preparation of 2-[4-(3-fluoropyridin-2-yloxy)-phenoxy]propionic acid derivatives which are known as herbicides.

    Abstract translation: 根据新方法,通过重氮化式II的3-氨基-2-卤代吡啶(II)制备其中X为卤素或三氟甲基的式I(I)的2,3-二氟吡啶,其中式 X如式I所定义,Y是溴,氯或氟,在氢氟酸存在下,得到式III的3-氟-2-卤代吡啶(III),其中X和Y如对于 并且用氟化剂处理其中Y是溴或氯的式III的3-氟-2-卤代吡啶。 通过新方法制备的2,3-二氟吡啶类是制备称为除草剂的2- [4-(3-氟吡啶-2-基氧基) - 苯氧基]丙酸衍生物的有价值的中间体。

    Process for the preparation of .alpha., .alpha.-difluoroalkyl phenyl
ether derivatives
    8.
    发明授权
    Process for the preparation of .alpha., .alpha.-difluoroalkyl phenyl ether derivatives 失效
    制备α,α-二氟烷基苯基醚衍生物的方法

    公开(公告)号:US4727187A

    公开(公告)日:1988-02-23

    申请号:US741387

    申请日:1985-06-05

    CPC classification number: C07C41/22 C07C213/08 C07C303/40 C07C319/20

    Abstract: The present invention relates to a novel process for the preparation of an .alpha.,.alpha.-difluoroalkyl phenyl ether of formula I ##STR1## wherein R.sup.1 is hydrogen, halogen, amino, nitro, --SO.sub.2 --R.sup.4, --S--R.sup.5, --SO--R.sup.6 or --S--S--R.sup.7,R.sup.2 is hydrogen, halogen, nitro, hydroxy or --SO.sub.2 --R.sup.8,R.sup.3 is C.sub.1 -C.sub.5 haloalkyl,X is oxygen, sulfur, --SO-- or --SO.sub.2 --,R.sup.4 is hydroxy, halogen, amino, --N.dbd.C.dbd.O, --NH--CO--Cl, --NH--CO--Br, --NR.sup.9 R.sup.10, benzyl, phenyl, C.sub.1 -C.sub.4 alkyl or --NH'CO--NR.sup.11 R.sup.12,R.sup.5 and R.sup.6 are C.sub.1 -C.sub.4 alkyl, phenyl or benzyl,R.sup.7 is C.sub.1 -C.sub.4 alkyl, phenyl or benzyl,R.sup.8 is hydroxy or halogen,R.sup.9 and R.sup.10 are each independently of the other C.sub.1 -C.sub.4 alkyl or benzyl andR.sup.11 and R.sup.12 are each independently of the other hydrogen, C.sub.1 -C.sub.4 alkyl, phenyl or an aromatic heterocycle,which process comprises fluorinating a compound of formula II ##STR2## wherein R.sup.1 R.sup.2, R.sup.3 and X are as defined for formula I, with hydrogen fluoride, in the presence of a catalytic amount of an antimony(V) compound. The intermediate of formula III ##STR3## obtained when carrying out said process may, if desired, be isolated by selecting suitable reaction conditions.

    Abstract translation: 本发明涉及一种制备式I的α,α-二氟烷基苯基醚的新方法,其中R 1是氢,卤素,氨基,硝基,-SO 2 -R 4,-S-R 5, -SO-R6或-SS-R7,R2是氢,卤素,硝基,羟基或-SO2-R8,R3是C1-C5卤代烷基,X是氧,硫,-SO-或-SO2-,R4是羟基, ,氨基,-N = C = O,-NH-CO-Cl,-NH-CO-Br,-NR9R10,苄基,苯基,C1-C4烷基或-NH'CO-NR11R12,R5和R6是C1-C4烷基, 苯基或苄基,R 7为C 1 -C 4烷基,苯基或苄基,R 8为羟基或卤素,R 9和R 10各自独立地为C 1 -C 4烷基或苄基,R 11和R 12各自独立地为氢,C 1 -C 4烷基, 苯基或芳族杂环,该方法包括在催化量的存在下,将氟化氢氟化,将式II化合物(II)氟化,其中R 1 + L,R 2,R 3和X如式I所定义。 锑(V)化合物。 如果需要,可以通过选择合适的反应条件来分离在进行所述方法时获得的式III的中间体(III)。

    N-benzoyl-N'-2,5-dihalo-4-perfluoroalkoxyphenylureas, pesticidal
compositions containing them and their use in the control of pests
    10.
    发明授权
    N-benzoyl-N'-2,5-dihalo-4-perfluoroalkoxyphenylureas, pesticidal compositions containing them and their use in the control of pests 失效
    N-苯甲酰基-N'-2,5'-二卤代-4-全氟烷氧基苯基脲,含有它们的杀虫组合物及其在防治害虫中的应用

    公开(公告)号:US4925875A

    公开(公告)日:1990-05-15

    申请号:US218191

    申请日:1988-07-13

    CPC classification number: A01N47/34 C07C205/37 C07C275/54

    Abstract: Novel substituted N-benzoyl-N'-2,5-dihalo-4-perfluoroalkoxyphenylureas of formula I ##STR1## in which R.sub.1 is hydrogen, fluorine, chlorine or bromine; R.sub.2 is fluorine or chlorine; each of R.sub.3 and R.sub.4 is fluorine, chlorine or bromine; and n is 2, 3, 4, 5, 6, 7 or 8, processes and intermediates for their prepraration, their use in pest control, and pesticidal compositions that contain at least one compound of formula I as active ingredient, are disclosed. The preferred field of application is the control of pests in and on animals and plants.

    Abstract translation: 式I的新型取代的N-苯甲酰基-N'-2,5-二卤代-4-全氟烷氧基苯基脲其中R 1是氢,氟,氯或溴; R2是氟或氯; R3和R4各自为氟,氯或溴; 并且n是2,3,4,5,6,7或8,其制备方法和中间体,它们在害虫防治中的应用,以及含有至少一种式I化合物作为活性成分的杀虫组合物。 优选的应用领域是控制动物和植物中的有害生物。

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