Process for preparing 2-(aminomethylidene)-4,4-difluoro-3-oxobutyric esters
    1.
    发明授权
    Process for preparing 2-(aminomethylidene)-4,4-difluoro-3-oxobutyric esters 有权
    制备2-(氨基亚甲基)-4,4-二氟-3-氧代丁酸酯的方法

    公开(公告)号:US08592578B2

    公开(公告)日:2013-11-26

    申请号:US13653615

    申请日:2012-10-17

    Applicant: BASF SE

    CPC classification number: C07D231/14 C07C229/30 C07D295/145

    Abstract: The present invention relates to a process for preparing difluoromethyl-substituted pyrazol-4-ylcarboxylic acids and their esters, 2-(aminomethylidene)-4,4-difluoro-3-oxobutteric esters of the formula (I) in which R1, R2 and R3 independently of one another are C1-C6-alkyl, C1-C6-haloalkyl, C2-C6-alkenyl, C3-C10-cycloalkyl or benzyl or NR2R3 is a 5- to 10-membered heterocyclic radical, to a process for preparing compounds of the formula (I) wherein an appropriate 3-aminoacrylic ester is reacted with difluoroacetyl fluoride and to the use of compounds of the formula (I) in the process for preparing difluoromethyl-substituted pyrazol-4-ylcarboxylic acids and their esters.

    Abstract translation: 本发明涉及式(I)的二氟甲基取代的吡唑-4-基羧酸及其酯,2-(氨基亚甲基)-4,4-二氟-3-氧代苦味酯的方法,其中R 1,R 2和 R 3彼此独立地是C 1 -C 6 - 烷基,C 1 -C 6 - 卤代烷基,C 2 -C 6 - 烯基,C 3 -C 10 - 环烷基或苄基或NR 2 R 3是5-至10-元杂环基, 式(I)的化合物,其中适当的3-氨基丙烯酸酯与二氟乙酰氟反应,以及在制备二氟甲基取代的吡唑-4-基羧酸及其酯的方法中使用式(I)的化合物。

    PROCESS FOR PREPARING ACETANILIDES
    4.
    发明申请
    PROCESS FOR PREPARING ACETANILIDES 有权
    制备乙酰胺的方法

    公开(公告)号:US20140364623A1

    公开(公告)日:2014-12-11

    申请号:US14371755

    申请日:2012-12-13

    Applicant: BASF SE

    CPC classification number: C07D231/12 C07C211/48

    Abstract: The present invention relates to a novel process for preparing acetanilides of the formula (I) by reacting a 2-halo-N-halomethylacetanilide of the formula (II) with an azole of the formula (III) H-A  (III) wherein the substituents R, R1, R2, R3, R4, A, X and X1 in the formulae (I), (II) and (III) have the meanings as indicated in the description.

    Abstract translation: 本发明涉及一种通过使式(II)的2-卤代-N-卤代甲基乙酰苯胺与式(III)的唑(III)的反应制备式(I)的乙酰苯胺的新方法,其中取代基R 式(I),(II)和(III)中的R 1,R 2,R 3,R 4,A,X和X 1具有如说明书中所示的含义。

    Process for manufacturing 5-chloromethyl-2,3-pyridine dicarboxylic acid anhydrides
    6.
    发明授权
    Process for manufacturing 5-chloromethyl-2,3-pyridine dicarboxylic acid anhydrides 有权
    制备5-氯甲基-2,3-吡啶二羧酸酐的方法

    公开(公告)号:US09278977B2

    公开(公告)日:2016-03-08

    申请号:US14220561

    申请日:2014-03-20

    Applicant: BASF SE

    Abstract: A process for manufacturing 5-chloromethyl-2,3-pyridine dicarboxylic acid anhydrides (I) wherein Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; comprising the steps of (i) reacting a compound of formula (II), wherein the symbols have the meaning given in formula (I), with a chlorinating agent, optionally in the presence of a radical initiator in a solvent selected from halogenated hydrocarbons, and (ii) crystallizing the compound (I) formed in step (i) from a solvent selected from chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, dichloroethane, trichloromethane, dichloromethane, toluene, xylenes, ethyl acetate, methyl tert.-butyl ether, and mixtures thereof. Compounds (I) are useful intermediates in the synthesis of herbicidal imidazolinones.

    Abstract translation: 制备其中Z为氢或卤素的5-氯甲基-2,3-吡啶二羧酸酐(I)的方法; Z1是氢,卤素,氰基或硝基; 包括以下步骤:(i)使式(II)化合物(其中符号具有式(I)中给出的含义)与氯化剂反应,任选在自由基引发剂存在下,在选自卤代烃, 和(ii)从选自氯苯,1,2-二氯苯,1,3-二氯苯,1,4-二氯苯,二氯乙烷,三氯甲烷,二氯甲烷,甲苯,二甲苯中的溶剂中,使步骤(i)中形成的化合物(I) ,乙酸乙酯,甲基叔丁基醚及其混合物。 化合物(I)是合成除草咪唑啉酮的有用中间体。

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