知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

86 条记录 (耗时 0.017 秒)

    Method for making .beta.-mercaptopropionic acid
    1.
    发明授权
    Method for making .beta.-mercaptopropionic acid 失效
    制备β-巯基丙酸的方法

    公开(公告)号：US5256818A

    公开(公告)日：1993-10-26

    申请号：US790369

    申请日：1991-11-12

    申请人： Tetsuzo Tomioka

    发明人： Tetsuzo Tomioka

    IPC分类号： C07C323/52 ,  C07C148/00

    CPC分类号： C07C323/52

    摘要： A novel method for making .beta.-mercaptopropionic acid which comprises adding alkaline hydroxide to thiodipropionic acid to obtain alkaline thiodipropionate, mixing thus obtained alkaline thiodipropionate with an aqueous solution of alkaline sulfide, then reacting the mixed solution with addition of heating in a required time, and acidifying the reacted solution with a strong acid.

    摘要翻译： 一种制备β-巯基丙酸的新方法，其包括向碱式二丙酸中加入碱性氢氧化物以获得碱式硫代二丙酸酯，将碱式硫代二丙酸碱与碱性硫化物水溶液混合，然后在所需时间内加热混合溶液， 用强酸酸化反应溶液。

    Preparation of thiophenols from phenols
    2.
    发明授权
    Preparation of thiophenols from phenols 失效
    从苯酚制备苯酚

    公开(公告)号：US4754072A

    公开(公告)日：1988-06-28

    申请号：US23182

    申请日：1987-03-09

    申请人： Elliott Bay

    发明人： Elliott Bay

    IPC分类号： C07C148/00 ,  C07C149/28

    CPC分类号： C07C323/00 ,  C07C327/00

    摘要： Thiophenols are formed from phenols by first reacting a phenol with thiophosgene to form an aryl chlorothionoformate which is subjected to a halogen exchange reaction using an alkali metal fluoride to yield the corresponding fluorothionoformate. This fluorothionoformate is then rearranged to the corresponding fluorothiolformate by heating and the resulting fluorothiolformate is then hydrolyzed to yield the desired thiophenol.

    摘要翻译： 硫酚由苯酚形成，首先使苯酚与硫光气反应形成硫代硫代叶酸芳基酯，其使用碱金属氟化物进行卤素交换反应，得到相应的氟代硫代甲酸酯。 然后通过加热将该氟硫代甲酸酯重排成相应的氟代硫代甲酸酯，然后将所得氟硫代甲酸酯水解，得到所需的苯硫酚。

    Method for preparation of benzyl mercaptan
    3.
    发明授权
    Method for preparation of benzyl mercaptan 失效
    苄硫醇的制备方法

    公开(公告)号：US4740623A

    公开(公告)日：1988-04-26

    申请号：US9844

    申请日：1987-01-30

    申请人： James B. Heather

    发明人： James B. Heather

    IPC分类号： C07C148/00

    CPC分类号： C07C321/00

    摘要： A method for the preparation of benzyl mercaptan is disclosed which comprises reacting a benzyl halide of the formula ##STR1## wherein X is chlorine or bromine, with an alkali metal hydrosulfide salt, at a temperature and for a sufficient period of time to cause formation of the benzyl mercaptan, said reaction being conducted under a hydrogen sulfide atmosphere at a temperature of about 50.degree. C. until approximately 90% of the starting material is converted to the benzyl mercaptan, then increasing the temperature to about 80.degree. C. for the balance of the reaction, the initial concentration of said hydrosulfide salt in solution being between about 5% and about 30% by weight.

    摘要翻译： 公开了一种制备苄基硫醇的方法，其包括在温度和足够的时间段下使式（IMAGE）其中X为氯或溴的苄基卤与碱金属氢硫化物盐反应，形成 苄基硫醇，所述反应在约50℃的硫化氢气氛下进行，直到原料的约90％转化为苄基硫醇，然后将温度升至约80℃，以使天平 的反应中，溶液中所述硫氢化物盐的初始浓度为约5％至约30％（重量）。

    Process for the preparation of nitrodiphenyl disulfides
    6.
    发明授权
    Process for the preparation of nitrodiphenyl disulfides 失效
    制备硝基二苯基二硫化物的方法

    公开(公告)号：US4618721A

    公开(公告)日：1986-10-21

    申请号：US714308

    申请日：1985-03-21

    申请人： Vittore Sartori

    发明人： Vittore Sartori

    IPC分类号： C07C319/14 ,  C07C20060101 ,  C07C67/00 ,  C07C313/00 ,  C07C319/24 ,  C07C321/28 ,  C07C323/09 ,  C07C323/65 ,  C07C148/00

    CPC分类号： C07C323/00

    摘要： The invention describes a process for the preparation of nitrodiphenyl disulfides by reacting halonitrobenzenes of the formula ##STR1## wherein X is chlorine, bromine or iodine, R.sub.1 is hydrogen or nitro and R.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl, halogen, nitro or the sulfo group, with the proviso that at least one of R.sub.1 and R.sub.2 is nitro, with an alkali disulfide, which process comprises carrying out the reaction in water with the addition of a non-ionic and/or anionic surfactant.Nitrodiphenyl disulfides are important intermediates and are used, inter alia, for the manufacture of textile dyes.

    摘要翻译： 本发明描述了一种制备硝基二苯基二硫化物的方法，该方法是通过使式（ⅩⅥ）的卤代硝基苯反应，其中X是氯，溴或碘，R 1是氢或硝基，R 2是氢，C 1 -C 4烷基，卤素，硝基或磺基 基团，条件是R 1和R 2中的至少一个是硝基，与碱二硫化物反应，该方法包括在水中加入非离子和/或阴离子表面活性剂进行反应。 硝基二苯基二硫化物是重要的中间体，尤其用于纺织染料的制造。

    Fluorinated thiocarbonic acid ester-fluorides
    7.
    发明授权
    Fluorinated thiocarbonic acid ester-fluorides 失效
    氟化硫代碳酸酯 - 氟化物

    公开(公告)号：US4564478A

    公开(公告)日：1986-01-14

    申请号：US670693

    申请日：1984-11-13

    申请人： Erich Klauke ,  Engelbert Kuhle

    发明人： Erich Klauke ,  Engelbert Kuhle

    IPC分类号： C07C323/52 ,  A01N37/02 ,  C07C67/00 ,  C07C313/00 ,  C07C325/00 ,  C07C327/00 ,  C07C329/00 ,  C07C329/02 ,  C07C333/02 ,  C07C153/017 ,  C07C148/00 ,  C07C153/023

    CPC分类号： C07C329/00 ,  C07C323/00

    摘要： Novel fluorinated thiocarbonic acid ester-fluorides of the formula ##STR1## in which R.sup.1 represents alkyl, cycloalkyl or optionally substituted aryl andR.sup.2 and R.sup.3 independently of one another represent hydrogen or alkyl, orR.sup.1 and R.sup.2 together represent an alkylene chain,a new process for the preparation of the new compounds and their use as intermediates for the preparation of compounds having herbicidal properties.Novel intermediates of the formulae ##STR2## in which R.sup.2 and R.sup.3 have the above-mentioned meaning,R.sup.4 is optionally substituted aryl,R.sup.5 is alkyl or cycloalkyl, andX is fluorine or chlorine, at least one X representing chlorine.

    摘要翻译： 式（I）的新型氟代硫代碳酸酯 - 氟化物，其中R 1表示烷基，环烷基或任选取代的芳基，R 2和R 3彼此独立地表示氢或烷基，或者R 1和R 2一起表示亚烷基链， 用于制备新化合物的新方法及其作为制备具有除草性的化合物的中间体的用途。 其中R 2和R 3具有上述含义的式“IMAGE”的新型中间体，R 4是任选取代的芳基，R 5是烷基或环烷基，X是氟或氯，至少一个X代表氯。

    Process for the preparation of 2,3-dimercaptosuccinic acid and its lower alkyl esters
    8.
    发明授权
    Process for the preparation of 2,3-dimercaptosuccinic acid and its lower alkyl esters 失效
    制备2,3-二巯基琥珀酸及其低级烷基酯的方法

    公开(公告)号：US4550193A

    公开(公告)日：1985-10-29

    申请号：US385953

    申请日：1982-06-07

    申请人： Martin K. O. Lindemann ,  Elvin R. Lukenbach

    发明人： Martin K. O. Lindemann ,  Elvin R. Lukenbach

    IPC分类号： C07C149/20 ,  C07C148/00

    CPC分类号： C07C323/00

    摘要： 2,3-dimercaptosuccinic acid and esters thereof are prepared by reacting sodium thiosulfate with acetylene dicarboxylic acid in the presence of a strong acid and subjecting the resulting alkylthiosulfate to an acid hydrolysis. The 2,3-dimercaptosuccinic acids and esters thereof are useful as an antidote for heavy metal poisoning.

    摘要翻译： 2,3-二巯基琥珀酸及其酯的制备方法是在强酸存在下使硫代硫酸钠与乙炔二羧酸反应，并使得到的烷基硫代硫酸盐进行酸水解。 2,3-二巯基琥珀酸及其酯可用作重金属中毒的解毒剂。

    Sulfide metathesis
    9.
    发明授权
    Sulfide metathesis 失效
    硫化物复分解

    公开(公告)号：US4537994A

    公开(公告)日：1985-08-27

    申请号：US542960

    申请日：1983-10-18

    申请人： John S. Roberts

    发明人： John S. Roberts

    IPC分类号： C07C149/10 ,  C07C148/00

    CPC分类号： C07C319/14

    摘要： Interchange reactions between organosulfides and mercaptans are promoted by the use of catalysts containing tungsten and molybdenum oxide.

    摘要翻译： 通过使用含有钨和氧化钼的催化剂来促进有机硫化物和硫醇之间的交换反应。