Process for the preparation of 2-amino-5-methyl-pyridine
    2.
    发明授权
    Process for the preparation of 2-amino-5-methyl-pyridine 失效
    2-氨基-5-甲基 - 吡啶的制备方法

    公开(公告)号:US5332824A

    公开(公告)日:1994-07-26

    申请号:US43648

    申请日:1993-04-06

    CPC分类号: C07D213/73 C07D213/74

    摘要: The invention relates to a novel process and novel intermediates for the preparation of 2-amino-5-methylpyridine (I) ##STR1## The process is characterized in that in a first step 3-methyl-pyridine 1-oxide of the formula (II) ##STR2## is reacted with a trialkylamine of the general formula (III)R.sub.3 N (III)in whichR represents alkyl,and with an electrophilic compound, in the presence or absence of a diluent, to give the ammonium salt of the general formula (IV) ##STR3## in which R has the abovementioned meaning andZ.sup..crclbar. represents an anion formed from an electrophilic compound, the compound (IV)is, possibly, isolated as a crude intermediate and, possibly, further purified and then in a second step the ammonium salt of the formula (IV) is reacted with hydrogen bromide, in the presence or absence of a diluent, at temperatures between 150.degree. C. and 300.degree. C.The compound (I) is an intermediate for the preparation of agrochemicals, for example of herbicides.

    摘要翻译: 本发明涉及一种用于制备2-氨基-5-甲基吡啶(I)的新方法和新型中间体(I)。该方法的特征在于在第一步中,将3-甲基 - 吡啶-1-氧化物 式(II)与存在或不存在稀释剂的通式(III)的通式(III)R3N(III)的三烷基胺反应,其中R表示烷基,并与亲电子化合物反应,得到 通式(IV)的铵盐其中R具有上述含义,Z( - )表示由亲电子化合物形成的阴离子,化合物(IV)可能被分离为粗中间体 并且可能进一步纯化,然后在第二步中,在存在或不存在稀释剂的情况下,在150℃至300℃的温度下,使式(IV)的铵盐与溴化氢反应。化合物 (I)是用于制备农药的中间体,例如除草剂。

    Process for the manufacture of substituted triazolinones
    3.
    发明授权
    Process for the manufacture of substituted triazolinones 有权
    制备取代的三唑啉酮的方法

    公开(公告)号:US06197971B1

    公开(公告)日:2001-03-06

    申请号:US09472482

    申请日:1999-12-27

    IPC分类号: C07D24912

    CPC分类号: C07D249/12

    摘要: The present invention relates to a process for manufacturing substituted triazolinones, which are intermediates in the preparation of herbicidally active compounds. In particular, this invention relates to the alkylation of a non-alkylated triazolinone intermediate product, wherein the improvement comprises conducting the alkylation reaction under pH controlled conditions. In a preferred embodiment, the invention relates to the preparation of a 5-alkoxy(or aryloxy)-2,4-dihydro-3H-1,2,4-triazol-3-one, and the alkylation of this non-alkylated triazolinone intermediate product, to produce a 5-alkoxy(or aryloxy)-4-alkyl-2,4-dihydro-3H-1,2,4-triazol-3-one.

    摘要翻译: 本发明涉及一种制备取代三唑啉酮的方法,它是制备除草活性化合物的中间体。 特别地,本发明涉及非烷基化三唑啉酮中间产物的烷基化,其中改进包括在pH控制条件下进行烷基化反应。 在优选的实施方案中,本发明涉及5-烷氧基(或芳氧基)-2,4-二氢-3H-1,2,4-三唑-3-酮的制备,并且该非烷基化的三唑啉酮的烷基化 中间产物,生成5-烷氧基(或芳氧基)-4-烷基-2,4-二氢-3H-1,2,4-三唑-3-酮。

    Process for the preparation of 2-halogeno-pyridine derivatives
    4.
    发明授权
    Process for the preparation of 2-halogeno-pyridine derivatives 失效
    2-卤代吡啶衍生物的制备方法

    公开(公告)号:US5502194A

    公开(公告)日:1996-03-26

    申请号:US220620

    申请日:1994-03-31

    摘要: A process for the preparation of a 2-halogeno-pyridine of the formula ##STR1## in which X represents halogen andY represents halogen, nitro, formyl, cyano, carboxyl, carbamoyl, alkyl, halogenoalkyl, alkoxyalkyl, dialkoxyalkyl, alkoxycarbonyl, alkylaminocarbonyl or dialkylaminocarbonyl,which comprises in a first stage reacting a pyridine 1-oxide of the formula ##STR2## with an organic nitrogen base A and an electrophilic compound, optionally in the presence of a diluent, to produce a compound of the formula ##STR3## in which A represents the radical of an organic nitrogen base, andZ.sup.- represents an anion formed from an electrophilic compound,optionally isolating and optionally purifying the compound of the formula (III).

    摘要翻译: 制备式(I)的2-卤代吡啶的方法,其中X表示卤素,Y表示卤素,硝基,甲酰基,氰基,羧基,氨基甲酰基,烷基,卤代烷基,烷氧基烷基,二烷氧基烷基,烷氧基羰基 ,烷基氨基羰基或二烷基氨基羰基,其包括在第一阶段中使式(I)的吡啶1-氧化物与有机氮碱A和亲电子化合物任选地在稀释剂存在下反应,以产生化合物 其中A表示有机氮基团的基团,Z-表示由亲电子化合物形成的阴离子的式(IMA)(III),任选分离并任选地纯化式(III)的化合物。

    Process for the manufacture of sulfonylaminocarbonyl triazolinones and
salts thereof
    7.
    发明授权
    Process for the manufacture of sulfonylaminocarbonyl triazolinones and salts thereof 有权
    磺酰氨基羰基三唑啉酮及其盐的制备方法

    公开(公告)号:US6147221A

    公开(公告)日:2000-11-14

    申请号:US472335

    申请日:1999-12-27

    IPC分类号: C07D249/12

    CPC分类号: C07D249/12

    摘要: The present invention relates to a process for manufacturing sulfonylaminocarbonyl triazolinones and salts thereof, which are herbicidally active compounds, wherein the process does not require isolation of the intermediate product. In particular, this invention relates to the conversion of a substituted triazolinone to a sulfonylaminocarbonyl triazolinone, and without the isolation of this intermediate product, the sulfonylaminocarbonyl triazolinone is then converted to a salt thereof.

    摘要翻译: 本发明涉及一种制备除草活性化合物的磺酰氨基羰基三唑啉酮及其盐的方法,其中该方法不需要中间产物的分离。 特别地,本发明涉及取代的三唑啉酮转化为磺酰基氨基羰基三唑啉酮,并且不分离该中间产物,然后将磺酰基氨基羰基三唑啉酮转化为其盐。

    Processes for the preparation of &agr;-substituted benzylnitroguanidines
    9.
    发明授权
    Processes for the preparation of &agr;-substituted benzylnitroguanidines 有权
    制备α-取代的苄基硝基胍的方法

    公开(公告)号:US06680408B2

    公开(公告)日:2004-01-20

    申请号:US10175639

    申请日:2002-06-20

    IPC分类号: C07C27708

    CPC分类号: C07C277/08 C07C279/36

    摘要: Processes for preparing &agr;-substituted benzylnitroguanidines include the steps of providing a reaction mixture comprising water, alcohol, an S-alkyl nitroisothiourea, and an &agr;-substituted benzylamine; heating the reaction mixture; steam distilling the alcohol from the reaction mixture; and isolating an &agr;-substituted benzylnitroguanidine from the remaining water layer.

    摘要翻译: 制备α-取代的苄基硝基胍的方法包括提供包含水,醇,S-烷基硝基异硫脲和α-取代的苄胺的反应混合物的步骤; 加热反应混合物; 将蒸汽从反应混合物中蒸馏出来; 并从剩余的水层中分离出α-取代的苄基硝基胍。