Process for the preparation of 5-hydroxymethylthiazole
    1.
    发明授权
    Process for the preparation of 5-hydroxymethylthiazole 失效
    5-羟甲基噻唑的制备方法

    公开(公告)号:US5780638A

    公开(公告)日:1998-07-14

    申请号:US762625

    申请日:1996-12-09

    IPC分类号: C07D277/24

    CPC分类号: C07D277/24

    摘要: 5-Hydroxymethylthiazole is prepared in an improved manner by reducing 5-formylthiazole using a borane compound. Particularly advantageous in this case is the use of 5-formylthiazole which has been obtained by reaction of a 2-halomalonaldehyde compound with thioformamide in the presence of less than 5% by weight of water (based on the reaction mixture).

    摘要翻译: 使用硼烷化合物还原5-甲酰基噻唑,以改进的方式制备5-羟基甲基噻唑。 在这种情况下特别有利的是使用5-甲酰基噻唑,其通过2-卤代甲醛化合物与硫代甲酰胺在小于5重量%的水(基于反应混合物)的存在下反应获得。

    Process for preparing 2-cyanoindan-1-ones
    3.
    发明授权
    Process for preparing 2-cyanoindan-1-ones 失效
    2-氰基茚满-1-酮的制备方法

    公开(公告)号:US06355827B1

    公开(公告)日:2002-03-12

    申请号:US09485957

    申请日:2000-02-18

    IPC分类号: C07C25314

    摘要: In a particularly advantageous process for producing 2-cyanoindan-1-ones from 2-halogenated indan-1-ones by reaction with a cyanide salt, the cyanide salt is dissolved in a dipolar aprotic solvent or in a water-miscible ether and 2-halogenated indan-1-one is metered into this solution.

    摘要翻译: 在通过与氰化物盐反应从2-卤代茚满-1-酮生成2-氰基茚满-1-酮的特别有利的方法中,将氰化物盐溶于偶极非质子溶剂或水混溶性醚中, 将卤代茚满-1-酮计量加入该溶液中。

    Process for the preparation of 2-chloro-6-nitrophenyl alkyl sulphides
and novel 2-chloro-6-nitrophenyl alkyl sulphides
    8.
    发明授权
    Process for the preparation of 2-chloro-6-nitrophenyl alkyl sulphides and novel 2-chloro-6-nitrophenyl alkyl sulphides 失效
    2-氯-6-硝基苯基烷基硫化物和新的2-氯-6-硝基苯基烷基硫化物的制备方法

    公开(公告)号:US5650542A

    公开(公告)日:1997-07-22

    申请号:US554143

    申请日:1995-11-06

    CPC分类号: C07C319/14 C07C2101/14

    摘要: 2-Chloro-6-nitrophenyl alkyl sulphides of the formula ##STR1## in which the substituents are as defined in the description, can be prepared by reacting 2,3-dichloro-nitrobenzenes of the formula ##STR2## with mercaptans of the formulaHS-R.sup.1 (III)in the presence of 1-1.2 equivalents of a base per mole of mercaptan and in the presence of a phase transfer catalyst, at a temperature of 0.degree.-100.degree. C., in an aqueous or aqueous-organic medium. The majority of the 2-chloro- 6-nitrophenyl alkyl sulphides obtainable in this way are novel.

    摘要翻译: 其中取代基如说明书中所定义的式(I)的2-氯-6-硝基苯基烷基硫化物可以通过使式(II)的2,3-二氯 - 硝基苯与式 与式-H-R1(III)的硫醇在1-1.2当量碱/每摩尔硫醇存在下,在相转移催化剂存在下,在0-100℃的温度下,在水溶液 或水 - 有机介质。 以这种方式获得的大多数2-氯-6-硝基苯基烷基硫化物是新颖的。

    Process for the preparation of 2,4- or 2,6-dihalogeno-aniline
    10.
    发明授权
    Process for the preparation of 2,4- or 2,6-dihalogeno-aniline 失效
    制备2,4-或2,6-二卤代苯胺的方法

    公开(公告)号:US5145958A

    公开(公告)日:1992-09-08

    申请号:US799918

    申请日:1991-11-26

    CPC分类号: C07C209/74

    摘要: 2,4- or 2,6-dihalogeno-aniline can be prepared by reacting an amino-benzoic acid ester of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 have the meanings indicated in the description, with 2-2.5 moles of a chlorinating or brominating agent in an inert reaction medium at a temperature of 40.degree.-160.degree. C. and subsequently hydrolyzing and decarboxylating the dihalogenated amino-benzoic acid ester.

    摘要翻译: 2,4-或2,6-二卤代苯胺可以通过使式(I)的氨基 - 苯甲酸酯与其中R1,R2和R3具有说明书所示含义的氨基 - 苯甲酸酯与2- 2.5摩尔氯化或溴化剂在惰性反应介质中,在40〜160℃下,随后水解和脱羧二卤代氨基 - 苯甲酸酯。