Selective preparation of isomers and enantiomers of cyclopropane
carboxylic acids
    31.
    发明授权
    Selective preparation of isomers and enantiomers of cyclopropane carboxylic acids 失效
    选择性制备环丙烷羧酸的异构体和对映异构体

    公开(公告)号:US4479005A

    公开(公告)日:1984-10-23

    申请号:US450500

    申请日:1982-12-16

    IPC分类号: C07D263/26 C07C69/74

    CPC分类号: C07D263/26

    摘要: A process has been discovered for selective preparation of isomers and enantiomers of 2,2-dimethyl-3-(2,2-dihalovinyl)cyclopropane carboxylic acids. In this process an adduct of an alkyl 3,3-dimethyl-4-pentenoate and a substituted 2-oxazolidone is reacted with a substituted dihalomethane compound. The resulting compound is cyclized, dehydrohalogenated and hydrolyzed to yield the desired product. These cyclopropane carboxylic acids are useful precursors for pyrethroid insecticides.

    摘要翻译: 已经发现了选择性制备2,2-二甲基-3-(2,2-二卤代乙烯基)环丙烷羧酸的异构体和对映异构体的方法。 在该方法中,3,3-二甲基-4-戊烯酸烷基酯和取代的2-恶唑烷酮的加合物与取代的二卤甲烷化合物反应。 将所得化合物环化,脱卤化氢并水解,得到所需产物。 这些环丙烷羧酸是拟除虫菊酯杀虫剂的有用前体。

    7-ethoxy-5-fluoromethyl-1,2,4-triazole[1,5-a]-pyrimidine-2-sulfonamindes
    33.
    发明授权
    7-ethoxy-5-fluoromethyl-1,2,4-triazole[1,5-a]-pyrimidine-2-sulfonamindes 失效
    7-乙氧基-5-氟甲基-1,2,4-三唑[1,5-a] - 嘧啶-2-磺酰胺

    公开(公告)号:US4959473A

    公开(公告)日:1990-09-25

    申请号:US183571

    申请日:1988-04-19

    IPC分类号: A01N43/90 C07D487/04

    CPC分类号: C07D487/04 A01N43/90

    摘要: N-(Substituted-phenyl)-7-ethoxy-5-fluoromethyl-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamides are prepared from 2-benzylthio-5-fluoromethyl-1,2,4-triazolo[1,5-a]pyrimidines and found to be herbicidal. The compounds, illustrated by 7-ethoxy-5-fluoromethyl-(2,6-dichloro-3-methylphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide, are degradable in the soil and are selective to wheat.

    摘要翻译: N-(取代的苯基)-7-乙氧基-5-氟甲基-1,2,4-三唑并[1,5-a]吡啶-2-磺酰胺由2-苄硫基-5-氟甲基-1,2 ,4-三唑并[1,5-a]嘧啶并发现是除草剂。 由7-乙氧基-5-氟甲基 - (2,6-二氯-3-甲基苯基)-1,2,4-三唑并[1,5-a]嘧啶-2-磺酰胺说明的化合物在土壤中是可降解的 对小麦有选择性。

    Herbicidal method with improved crop tolerance
    34.
    发明授权
    Herbicidal method with improved crop tolerance 失效
    具有改良作物耐受性的除草方法

    公开(公告)号:US4874421A

    公开(公告)日:1989-10-17

    申请号:US206537

    申请日:1988-06-14

    IPC分类号: A01N25/32 A01N43/40

    CPC分类号: A01N25/32 A01N43/40

    摘要: The selectivity of aryloxyphenoxypropanoate herbicides, such as methyl 2-(4-((3-chloro-5-(trifluoromethyl)-2-pyridinyl)oxy)phenoxy)propanoate, when used for the control of weeds in grassy crops, such as rice, can be improved by pre-treating the grassy crop seeds or plants with an amount of an aryloxyphenoxypropanoate herbicide sufficient to elevate the acetyl-coenzyme A carboxylase enzyme activity level, but insufficient to cause phytotoxicity.

    摘要翻译: 芳基氧基丙酸酯除草剂的选择性,如2-(4 - ((3-氯-5-(三氟甲基)-2-吡啶基)氧)苯氧基)丙酸甲酯,用于控制草地作物中的杂草,如水稻 可以通过用一定量的足以提高乙酰辅酶A羧化酶活性水平但不足以引起植物毒性的芳基氧基丙酸酯除草剂预处理草地作物种子或植物来改进。

    Selective preparation of isomers and enantiomers of cyclopropane
carboxylic acids
    37.
    发明授权
    Selective preparation of isomers and enantiomers of cyclopropane carboxylic acids 失效
    选择性制备环丙烷羧酸的异构体和对映异构体

    公开(公告)号:US4515956A

    公开(公告)日:1985-05-07

    申请号:US639768

    申请日:1984-08-13

    CPC分类号: C07D263/22 C07D263/26

    摘要: A process has been discovered for selective preparation of isomers and enantiomers of 2,2-dimethyl-3-(2,2-dihalovinyl)cyclopropane carboxylic acids. In this process an adduct of an alkyl 3,3-dimethyl-4-pentenoate and a substituted 2-oxazolidone is reacted with a substituted dihalomethane compound. The resulting compound is cyclized, dehydrohalogenated and hydrolyzed to yield the desired product. These cyclopropane carboxylic acids are useful precursors for pyrethroid insecticides.

    摘要翻译: 已经发现了选择性制备2,2-二甲基-3-(2,2-二卤代乙烯基)环丙烷羧酸的异构体和对映异构体的方法。 在该方法中,3,3-二甲基-4-戊烯酸烷基酯和取代的2-恶唑烷酮的加合物与取代的二卤甲烷化合物反应。 将所得化合物环化,脱卤化氢并水解,得到所需产物。 这些环丙烷羧酸是拟除虫菊酯杀虫剂的有用前体。