Process for the preparation of a triazolinone herbicide
    2.
    发明授权
    Process for the preparation of a triazolinone herbicide 失效
    制备三唑啉酮除草剂的方法

    公开(公告)号:US06194583B1

    公开(公告)日:2001-02-27

    申请号:US09525394

    申请日:2000-03-15

    IPC分类号: C07D24912

    CPC分类号: C07D249/12

    摘要: A process for preparing an alkyl &agr;-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-2,4-substituted-benzene-propanoate herbicide, by reacting an alkyl &agr;-acetyl-5-[4-(difluoromethyl)4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-2,4-disubstituted-benzene-propanoate, Intermediate D, first with sodium hypochlorite, then with a base, and recovering the herbicide. Intermediate D is prepared by reacting a 1-(2, 4-disubstituted-5-halophenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole, Intermediate B, with an alkyl alkanoate in the presence of a palladium catalyst and a tertiary amine. Intermediate B is prepared by reacting a 1-(2,4-disubstituted-phenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole with a halogenating agent in the presence of an acid. The 2,4-substituents are independently selected from halo, alkyl, cycloalkyl, alkoxy, nitro, or hetercyclyl.

    摘要翻译: 制备α-2-氯-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑-1-基] - 通过α-乙酰基-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑的烷基酯的制备将2,4-取代的苯丙酸酯除草剂 -1-基] -2,4-二取代 - 苯 - 丙酸酯,中间体D,首先用次氯酸钠,然后与碱反应,并回收除草剂。 中间体D通过1-(2,4-二取代-5-卤代苯基)-4-二氟甲基-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑,中间体 B与烷基链烷酸酯在钯催化剂和叔胺的存在下反应。 中间体B通过使1-(2,4-二取代 - 苯基)-4-二氟甲基-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑与卤化剂 在酸的存在下。 2,4-取代基独立地选自卤素,烷基,环烷基,烷氧基,硝基或杂环基。

    Process for the preparation of a triazolinone herbicide
    4.
    发明授权
    Process for the preparation of a triazolinone herbicide 失效
    制备三唑啉酮除草剂的方法

    公开(公告)号:US6077959A

    公开(公告)日:2000-06-20

    申请号:US172157

    申请日:1998-10-14

    IPC分类号: C07D249/12

    CPC分类号: C07D249/12

    摘要: A process for preparing an alkyl .alpha.-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-2,4-substituted-benzene-propanoate herbicide, by reacting an alkyl .alpha.-acetyl-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-2,4-disubstituted-benzene-propanoate, Intermediate D, first with sodium hypochlorite, then with a base, and recovering the herbicide. Intermediate D is prepared by reacting a 1-(2, 4-disubstituted-5-halophenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole, Intermediate B, with an alkyl alkanoate in the presence of a palladium catalyst and a tertiary amine. Intermediate B is prepared by reacting a 1-(2,4-disubstituted-phenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole with a halogenating agent in the presence of an acid. The 2,4-substituents are independently selected from halo, alkyl, cycloalkyl, alkoxy, nitro, or hetercyclyl.

    摘要翻译: 制备α-2-氯-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑-1-基] - 通过使α-乙酰基-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-苯并二氮杂- 三唑-1-基] -2,4-二取代 - 苯 - 丙酸酯,中间体D,首先用次氯酸钠,然后与碱反应,并回收除草剂。 中间体D通过1-(2,4-二取代-5-卤代苯基)-4-二氟甲基-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑,中间体 B与烷基链烷酸酯在钯催化剂和叔胺的存在下反应。 中间体B通过使1-(2,4-二取代 - 苯基)-4-二氟甲基-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑与卤化剂 在酸的存在下。 2,4-取代基独立地选自卤素,烷基,环烷基,烷氧基,硝基或杂环基。

    Process for the preparation of a triazolinone herbicide
    5.
    发明授权
    Process for the preparation of a triazolinone herbicide 失效
    制备三唑啉酮除草剂的方法

    公开(公告)号:US06268506B1

    公开(公告)日:2001-07-31

    申请号:US09688406

    申请日:2000-10-16

    IPC分类号: C07D24912

    CPC分类号: C07D249/12

    摘要: A process for preparing an alkyl &agr;-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-2,4-substituted-benzene-propanoate herbicide, by reacting an alkyl &agr;-acetyl-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-2,4-disubstituted-benzene-propanoate, Intermediate D, first with sodium hypochlorite, then with a base, and recovering the herbicide. Intermediate D is prepared by reacting a 1-(2,4-disubstituted-5-halophenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole, Intermediate B, with an alkyl alkanoate in the presence of a palladium catalyst and a tertiary amine. Intermediate B is prepared by reacting a 1-(2,4-disubstituted-phenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole with a halogenating agent in the presence of an acid. The 2,4-substituents are independently selected from halo, alkyl, cycloalkyl, alkoxy, nitro, or hetercyclyl.

    摘要翻译: 制备α-2-氯-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑-1-基] - 通过α-烷基α-乙酰基-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑并[ 三唑-1-基] -2,4-二取代 - 苯 - 丙酸酯,中间体D,首先用次氯酸钠,然后与碱反应,并回收除草剂。 中间体D通过使1-(2,4-二取代-5-卤代苯基)-4-二氟甲基-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑,中间体 B与烷基链烷酸酯在钯催化剂和叔胺的存在下反应。 中间体B通过使1-(2,4-二取代 - 苯基)-4-二氟甲基-4,5-二氢-3-甲基-5-氧代-1H-1,2,4-三唑与卤化剂 在酸的存在下。 2,4-取代基独立地选自卤素,烷基,环烷基,烷氧基,硝基或杂环基。

    Preparation of a mannich base intermediate for
2-[(4-heterocyclic-phenoxymethyl)-phenoxy]-alkanoates
    6.
    发明授权
    Preparation of a mannich base intermediate for 2-[(4-heterocyclic-phenoxymethyl)-phenoxy]-alkanoates 失效
    制备2 - [(4-杂环 - 苯氧基甲基) - 苯氧基] - 烷酸酯的甘露糖基中间体

    公开(公告)号:US6136972A

    公开(公告)日:2000-10-24

    申请号:US510415

    申请日:2000-02-22

    摘要: A Mannich base intermediate for 2-[(4-heterocyclic-phenoxymethyl)-phenoxyl]-alkanoates and methods for its preparation are provided. A method for preparation of an alkyl 2-[2-(secondary amino methyl)-5-alkylphenoxy]-alkanoate comprises the steps of: reacting a mixture of m-alkyl phenol, a secondary amine, and an aldehyde, with or without a catalyst, in a first solvent at reflux temperatures to form a 2-[(secondary amino)methyl]-5-alkylphenol. That product is then reacted with an alkyl 2-haloalkanoate, and an alkali metal carbonate, with or without a second catalyst in a second solvent at reflux temperatures to form the 2-[2-(secondary amino methyl)-5-alkylphenoxy]-alkanoate. The aldehyde may be paraformaldehyde, aqueous formaldehyde, formaldehyde, or polymerized acetal derivatives thereof. The first solvent may be acetonitrile or toluene. The catalyst may be an acid catalyst or a base catalyst. In the preferred embodiment the Mannich base is a 2-[(secondary amino)-methyl]-5-alkylphenol, or a 2-[2-(secondary amino methyl)-5-alkylphenoxy]-alkanoate.

    摘要翻译: 提供了2 - [(4-杂环 - 苯氧基甲基) - 苯氧基] - 烷酸烷基酯的曼尼希碱中间体及其制备方法。 制备2- [2-(仲氨基甲基)-5-烷基苯氧基] - 烷酸烷基酯的方法包括以下步骤:使m-烷基苯酚,仲胺和醛的混合物与或不与 催化剂,在第一溶剂中在回流温度下形成2 - [(仲氨基)甲基] -5-烷基苯酚。 然后将该产物与2-卤代烷酸烷基酯和碱金属碳酸盐在第二溶剂中在或不与第二催化剂在回流温度下反应,形成2- [2-(仲氨基甲基)-5-烷基苯氧基] - 链烷酸酯 醛可以是多聚甲醛,甲醛水溶液,甲醛或其聚合的缩醛衍生物。 第一溶剂可以是乙腈或甲苯。 催化剂可以是酸催化剂或碱催化剂。 在优选的实施方案中,曼尼希碱是2 - [(仲氨基) - 甲基] -5-烷基苯酚或2- [2-(仲氨基甲基)-5-烷基苯氧基] - 烷酸酯。