Process for preparing pyridine-2,6-diamines
    62.
    发明授权
    Process for preparing pyridine-2,6-diamines 失效
    制备吡啶-2,6-二胺的方法

    公开(公告)号:US5939553A

    公开(公告)日:1999-08-17

    申请号:US952788

    申请日:1997-11-13

    CPC分类号: C07D213/73 C07D213/74

    摘要: A process has been found for preparing pyridine-2,6-diamines, i.e., 2,6-diaminopyridine (DAP) and derivative compounds in which one of the amino groups is a substituted amine (secondary or tertiary). According to this process, 3-hydroxy pentane 1,5-dinitrile (3-hydroxyglutaronitrile) is reacted with an ammonium donor in the form of ammonia, a primary amine such as n-butylamine, or a secondary amine such as piperidine.

    摘要翻译: PCT No.PCT / EP96 / 01730 Sec。 371日期:1997年11月13日 102(e)1997年11月13日PCT PCT 1996年4月24日PCT公布。 公开号WO96 / 36607 日期1996年11月21日已经发现制备吡啶-2,6-二胺,即2,6-二氨基吡啶(DAP)和其中一个氨基是取代胺(仲或叔))的衍生化合物的方法。 根据该方法,将3-羟基戊烷1,5-二腈(3-羟基戊二腈)与氨,仲胺如正丁胺或仲胺如哌啶的铵供体反应。

    Process for the production of pyridine or alkyl substituted pyridines
    67.
    发明授权
    Process for the production of pyridine or alkyl substituted pyridines 失效
    制备吡啶或烷基取代吡啶的方法

    公开(公告)号:US4675410A

    公开(公告)日:1987-06-23

    申请号:US848891

    申请日:1986-03-21

    摘要: A process for preparing pyridine or alkyl substituted pyridines in high yield, comprises reacting a C.sub.2-5 -aldehyde, a C.sub.3-5 -ketone or a mixture thereof, ammonia and, optionally, formaldehyde, in the gas phase in contact with a fluidized or otherwise movable bed of a catalytically effective amount of a crystalline aluminosilicate zeolite catalyst in the acidic form and having a constraint index of about 1 to about 12, with an actual contact time of the reactants with the catalyst which is at least as great as said actual contact time when the reaction is conducted in a 1 inch diameter fluid bed reactor with a pseudo contact time of at least about 2.5 seconds.

    摘要翻译: 以高产率制备吡啶或烷基取代的吡啶的方法包括使C2-5-醛,C3-5-酮或其混合物与氨和任选的甲醛在气相中与流化或 催化有效量的具有酸性形式的结晶硅铝酸盐沸石催化剂的活性床,其约束指数为约1至约12,反应物与催化剂的实际接触时间至少等于所述实际值 当反应在具有至少约2.5秒的伪接触时间的1英寸直径流化床反应器中进行时的接触时间。

    Process for the production of 3,5-dialkylpyridines
    68.
    发明授权
    Process for the production of 3,5-dialkylpyridines 失效
    制备3,5-二烷基吡啶的方法

    公开(公告)号:US4429131A

    公开(公告)日:1984-01-31

    申请号:US396102

    申请日:1982-07-07

    申请人: James I. Grayson

    发明人: James I. Grayson

    IPC分类号: C07D213/08 C07D213/09

    CPC分类号: C07D213/08

    摘要: Process for the production of 3,5-dialkylpyridines. An aldehyde having the formula R--CH.sub.2 --CHO, wherein R is a straight-chained or branched alkyl radical having 1 to 6 carbon atoms, and/or an acetal of such aldehyde is reacted with formaldehyde and/or hexamethylene tetramine and/or a formaldehyde acetal and/or a polymer of formaldehyde in liquid or aqueous phase at a temperature of 180.degree. to 280.degree. C. in a closed vessel in the presence of ammonia and/or ammonium ions and in the presence of anions of an inorganic and/or an organic acid, both of which at 20.degree. C. have an acid dissociation constant of 10.sup.6 to 10.sup.-12.

    摘要翻译: 制备3,5-二烷基吡啶的方法。 将具有式R-CH2-CHO(其中R是具有1至6个碳原子的直链或支链烷基)和/或这种醛缩醛的醛与甲醛和/或六亚甲基四胺和/或 甲醛缩醛和/或甲醛在液相或水相中的聚合物,在氨和/或铵离子的存在下,在密闭容器中,在180-280℃的温度下,在无机和/ 或有机酸,二者在20℃下的酸解离常数为106〜10〜12。

    Process for the preparation of pyridine and substituted pyridines
    69.
    发明授权
    Process for the preparation of pyridine and substituted pyridines 失效
    制备吡啶和取代吡啶的方法

    公开(公告)号:US4401819A

    公开(公告)日:1983-08-30

    申请号:US360567

    申请日:1982-03-22

    摘要: The present invention relates to a process for the preparation of pyridine and substituted pyridines, in the vapor phase. These compounds are obtained by heating, at a temperature of 200.degree. to 500.degree. C., in the vapor phase:piperidine or piperidine substituted by one or more lower alkyl radicals;1,5-diaminopentane;1,5-diaminopentane containing, in its hydrocarbon part, from 1 to 3 linear or branched alkyl radicals having from 1 to 4 carbon atoms; orcompounds such as: N,N'-bis-(piperidin-2-yl)hydrazines,in the presence of a catalyst consisting of palladium, platinum or ruthenium deposited on a macroporous solid.The products obtained by the process according to the invention have various uses. Pyridine is used in particular as a solvent. .beta.-Picoline (or 3-methylpyridine) is used for the preparation of nicotinic acid or nicotinamide, used in pharmacy and in nutrition.

    摘要翻译: 本发明涉及一种在气相中制备吡啶和取代吡啶的方法。 这些化合物通过在气相中在200〜500℃的温度下加热得到:哌啶或被一个或多个低级烷基取代的哌啶; 1,5-二氨基戊烷; 在其烃部分含有1至3个具有1至4个碳原子的直链或支链烷基的1,5-二氨基戊烷; 或诸如:N,N'-双(哌啶-2-基)肼的化合物在沉积在大孔固体上的由钯,铂或钌组成的催化剂存在下进行。 通过本发明方法获得的产品具有各种用途。 特别是作为溶剂使用吡啶。 β-哌啶(或3-甲基吡啶)用于制备用于制药和营养的烟酸或烟酰胺。

    Process for producing alpha-picoline
    70.
    发明授权
    Process for producing alpha-picoline 失效
    生产α-甲基吡啶的方法

    公开(公告)号:US4395554A

    公开(公告)日:1983-07-26

    申请号:US369296

    申请日:1982-04-16

    摘要: Alpha-picolines are produced by containing aniline or substituted anilines, such as alkyl-, cyclo alkyl-, halo- ; alkoxy- or substituted alkyl-anilines with a crystalline zeolite catalyst having a silica:alumina ratio of at least 12 and a constraint index of 1 to 12. ZSM-5 type catalysts are contacted at elevated temperature to yield alpha-picolines selectively.

    摘要翻译: 通过含有苯胺或取代的苯胺如烷基 - ,环烷基 - ,卤代 - 烷氧基或取代的烷基苯胺与具有至少12的二氧化硅:氧化铝比的结晶沸石催化剂和1至12的约束指数。ZSM-5型催化剂在升高的温度下接触以选择性地产生α-吡啶甲酸。