Preparation of 2-chloro-5-methyl-pyridine
    51.
    发明授权
    Preparation of 2-chloro-5-methyl-pyridine 失效
    2-氯代-5-甲基吡啶的制备

    公开(公告)号:US5099025A

    公开(公告)日:1992-03-24

    申请号:US716035

    申请日:1991-06-14

    CPC分类号: C07D213/61

    摘要: A process for the preparation of 2-chloro-5-methylpyridine of the formula ##STR1## which comprises reacting 3-methyl-pyridine-1-oxide of the formula ##STR2## with a chlorinating agent of the formula ##STR3## in which R.sup.1 represents alkyl, halogenoalkyl, cycloalkyl, optionally substituted aryl, NR.sup.2 R.sup.3 or OR.sup.4 in whichR.sup.2 and R.sup.3 individually represent alkyl, cycloalkyl or aryl or together represent alkanediyl or oxaalkanediyl andR.sup.4 represents alkyl, cycloalkyl or optionally substituted aryl,in the presence of a basic organic nitrogen compound and in the presence of a diluent at a temperature between about -20.degree. C. and +150.degree. C.

    摘要翻译: 制备式(I)的2-氯-5-甲基吡啶的方法,其包括使式(I)的3-甲基 - 吡啶-1-氧化物与式 (III)其中R 1表示烷基,卤代烷基,环烷基,任选取代的芳基,NR 2 R 3或OR 4,其中R 2和R 3各自代表烷基,环烷基或芳基或一起表示烷二基或氧杂烷二基,R 4表示烷基,环烷基或任选取代 芳基,在碱性有机氮化合物的存在下,在稀释剂存在下,在约-20℃至+ 150℃之间的温度下进行。

    Process for the preparation of 2-chloro-5-chloromethylpyridine
    52.
    发明授权
    Process for the preparation of 2-chloro-5-chloromethylpyridine 失效
    制备2-氯-5-氯甲基吡啶的方法

    公开(公告)号:US4990622A

    公开(公告)日:1991-02-05

    申请号:US447145

    申请日:1989-12-06

    申请人: Klaus Jelich

    发明人: Klaus Jelich

    摘要: A process for the preparation of 2-chloro-5-chloromethylpyridine of the formula (I) ##STR1## which is used as an intermediate for the preparation of insecticides, the process comprising (a) reacting in a first step nicotinic acid of the formula (II) ##STR2## with phosphorus pentachloride, if appropriate in the presence of thionyl chloride and if appropriate in the presence of a diluent, (b) reacting in a second step the resulting 3-trichloromethylpyridine from the first step, of the formula III, ##STR3## with an alkali metal alkoxide of the formual (IV)R--O--M (IV)in whichR represents alkyl andM represents an alkali metal cation,if appropriate in the presence of a diluent, (c) reacting in a third step the resulting pyridine ether acetal from the second step, of the formula (V), ##STR4## in which R has the abovementioned meaning with water, if appropriate in the presence of a catalyst acid, (d) hydrogenating in a fourth step the resulting pyridine aldehyde from the third step, of the formula (VI), ##STR5## in which R has the abovementioned meaning with molecular hydrogen in the presence of a hydrogenation catalyst and, if appropriate, in the presence of a diluent, and, finally, (e) reacting in a fifth step the resulting pyridylmethanol from the fourth step of the formula (VII), ##STR6## in which R has the abovementioned meaning.

    摘要翻译: 一种制备式(I)的2-氯-5-氯甲基吡啶的方法,其用作制备杀虫剂的中间体,该方法包括(a)在第一步中使烟酸 (II)与五氯化磷(如果合适的话)在亚硫酰氯的存在下,如果合适的话,在稀释剂的存在下,(b)在第二步骤中使得到的来自第一步的3-三氯甲基吡啶 (IV)的碱金属醇盐,其中R表示烷基,M表示碱金属阳离子,如果合适的话,在稀释剂存在下,将式III的化合物(III)与式(IV) (c)在第三步骤中,如果合适的话,在催化剂存在下,将得到的式(V)的第二步产生的吡啶醚缩醛与其中R具有上述含义的式(V)化合物反应 ,(d)在第四步骤中氢化得自所述吡啶醛的吡啶醛 (VI)的化合物,其中R在氢化催化剂的存在下和分子氢具有上述含义,如果合适的话,在稀释剂的存在下,最后(( e)在第五步中使得到的式(VII)第四步得到的吡啶基甲醇,其中R具有上述含义。

    Preparation of 2-chloro-5-chloromethylpyridine
    54.
    发明授权
    Preparation of 2-chloro-5-chloromethylpyridine 失效
    制备2-氯-5-氯甲基吡啶

    公开(公告)号:US4958025A

    公开(公告)日:1990-09-18

    申请号:US445816

    申请日:1989-12-04

    申请人: Klaus Jelich

    发明人: Klaus Jelich

    摘要: A process for the preparation of 2-chloro-5-chloromethyl-pyridine of the formula ##STR1## which comprises reacting nicotinic acid of the formula ##STR2## with phosphorus pentachloride to produce 3-trichloromethylpyridine of the formula ##STR3## reacting the 3-trichloromethylpyridine in a 2nd step with an alkali metal alkoxide of the formulaR-O-M (IV)in whichR represents alkyl andM represaents an alkali metal cation, to produce a pyridine ether acetal of the formula ##STR4## reacting the pyridine ether acetal in a 3rd step with dilute aqueous acid to produce pyridone aldehyde of the formula ##STR5## hydrogenating the pyridone aldehyde in a 4th step with molecular hydrogen in the presence of a hydrogenation catalyst to produce the pyridylmethanol compound of the formula ##STR6## and reducing the pyridylmethanol compound in a 5th step with a chlorinating agent.

    摘要翻译: 制备式(I)的2-氯-5-氯甲基 - 吡啶的方法,其包括将式(XI)的烟酸与五氯化磷反应,得到式III的3-三氯甲基吡啶, (III)使第二步中的3-三氯甲基吡啶与式(IV)的碱金属醇盐反应,其中R表示烷基,M代表碱金属阳离子,得到式IMA图示的吡啶醚缩醛 (V)使第三步的吡啶醚缩醛与稀酸水反应,生成下式的吡啶酮醛(VI)在氢化催化剂存在下用第四步用分子氢氢化吡啶酮醛以产生 式(VII)的吡啶基甲醇化合物,并在第5步中用氯化剂还原吡啶基甲醇化合物。

    (O-substituted oximino)-pyrazolin-5-one pesticides
    56.
    发明授权
    (O-substituted oximino)-pyrazolin-5-one pesticides 失效
    (O-取代的肟基) - 吡唑啉-5-酮农药

    公开(公告)号:US4666933A

    公开(公告)日:1987-05-19

    申请号:US875129

    申请日:1986-06-17

    摘要: Fungicidally active substituted pyrazolin-5-ones of the formula ##STR1## in which R.sup.1 is hydrogen or alkyl,R.sup.2 is hydrogen, alkyl, alkenyl, alkinyl, cyanoalkyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonylalkyl or alkoxycarbonylalkyl, aminocarbonylalkyl, alkylaminocarbonylalkyl or dialkylaminocarbonylalkyl, or in each case optionally substituted oxiranylmethyl, aralkyl or aryl, andR.sup.3 is alkyl, alkenyl, alkinyl, cyanoalkyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonylalkyl, alkoxycarbonylalkyl, cycloalkyl or cycloalkylalkyl, or in each case optionally substituted aralkyl, aryloxyalkyl or arylthioalkyl, but wherein R.sup.3 is methyl or ethyl only if R.sup.1 and/or R.sup.2 is not hydrogen or methyl.

    摘要翻译: R 1为氢或烷基,R 2为氢,烷基,烯基,炔基,氰基烷基,羟基烷基,烷氧基烷基,羟基羰基烷基或烷氧基羰基烷基,氨基羰基烷基,烷基氨基羰基烷基或二烷基氨基羰基烷基的芳香族活性取代的吡唑啉-5-酮 每种情况下任选取代的环氧乙烷基甲基,芳烷基或芳基,R 3是烷基,烯基,炔基,氰基烷基,羟基烷基,烷氧基烷基,羟基羰基烷基,烷氧基羰基烷基,环烷基或环烷基烷基,或在每种情况下任选取代的芳烷基,芳氧基烷基或芳硫基烷基, 或仅在R 1和/或R 2不是氢或甲基时为乙基。