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17 条记录 (耗时 0.019 秒)

    Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine
    1.
    发明授权
    Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine 失效
    制备2,2,6,6-四甲基-4-氧代哌啶的方法

    公开(公告)号：US3959295A

    公开(公告)日：1976-05-25

    申请号：US481922

    申请日：1974-06-21

    申请人： Ivan Orban ,  Hanns Lind ,  Heimo Brunetti ,  Jean Rody ,  Michael Rasberger

    发明人： Ivan Orban ,  Hanns Lind ,  Heimo Brunetti ,  Jean Rody ,  Michael Rasberger

    IPC分类号： C07D211/74

    摘要： 2,2,6,6-Tetramethyl-4-oxopiperidine is prepared from acetone and ammonia in the presence of acidic catalysts. Suitable catalysts are Lewis acids, protionic acids and their salts with ammonia or with organic bases, as for example BF.sub.3, NH.sub.4 Cl or H.sub.2 SO.sub.4. The addition of an alcohol such as methanol as well as the use of a cocatalyst may promote the reaction. The process may be carried out in two steps, in the first of which the temperature is held below 35.degree.C. In the second step a further amount of acetone is added and the temperature is rised to about 40.degree. to 65.degree.C.

    摘要翻译： 在酸性催化剂存在下，由丙酮和氨制备2,2,6,6-四甲基-4-氧代哌啶。 合适的催化剂是路易斯酸，丙酸及其与氨或有机碱的盐，例如BF 3，NH 4 Cl或H 2 SO 4。 加入醇如甲醇以及助催化剂的使用可能促进反应。 该方法可以在两个步骤中进行，其中第一步将温度保持在35℃以下。在第二步中，加入另外量的丙酮，将温度升至约40℃至65℃。

    Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine
    2.
    发明授权
    Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine 失效
    制备2,2,6,6-四甲基-4-氧代哌啶的方法

    公开(公告)号：US3960875A

    公开(公告)日：1976-06-01

    申请号：US481935

    申请日：1974-06-21

    申请人： Ivan Orban ,  Hanns Lind ,  Heimo Brunetti ,  Jean Rody

    发明人： Ivan Orban ,  Hanns Lind ,  Heimo Brunetti ,  Jean Rody

    IPC分类号： C07D211/74

    CPC分类号： C07D211/74

    摘要： 2,2,6,6-Tetramethyl-4-oxopiperidine is prepared from 2,2,4,4,6-pentamethyl-2,3,4,5-tetramethylpyrimidine (acetonine) by heating in the presence of acetone, diacetone alcohol or water. These regents may be used in excess or an organic solvent is added. The preferred modification is the heating of acetonine hydrate in an excess of acetone or in an acetone-methanol mixture to about 40.degree. to 65.degree.C for several hours. The use of diacetone alcohol permits higher reaction temperatures leading to shorter reaction times.

    摘要翻译： 2,2,6,6-四甲基-4-氧代哌啶由2,2,4,4,6-五甲基-2,3,4,5-四甲基嘧啶（丙酮）通过在丙酮存在下加热，双丙酮醇 或水。 这些试剂可以过量使用或添加有机溶剂。 优选的修改是将丙酮水合物在过量丙酮中或在丙酮 - 甲醇混合物中加热至约40至65℃几个小时。 使用双丙酮醇允许更高的反应温度导致更短的反应时间。

    Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine
    3.
    发明授权
    Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine 失效
    制备2,2,6,6-四甲基-4-氧代哌啶的方法

    公开(公告)号：US3953459A

    公开(公告)日：1976-04-27

    申请号：US481921

    申请日：1974-06-21

    申请人： Ivan Orban ,  Hanns Lind ,  Heimo Brunetti ,  Jean Rody

    发明人： Ivan Orban ,  Hanns Lind ,  Heimo Brunetti ,  Jean Rody

    IPC分类号： C07D211/74

    CPC分类号： C07D211/74

    摘要： 2,2,6,6-Tetramethyl-4-oxopiperidine is prepared from 2,2,4,4,6-pentamethyl-2,3,4,5-tetrahydropyrimidine by treatment with an acidic catalyst. Suitable catalysts are Lewis acids, protonic acids and their salts with ammonia or organic bases. The reaction may be carried out in organic solvents, preferably in acetone, by gentle heating, for example at 40.degree. to 65.degree.C. Yields of 95% are obtainable after a reaction of several hours.

    摘要翻译： 通过用酸性催化剂处理由2,2,4,4,6-五甲基-2,3,4,5-四氢嘧啶制备2,2,6,6-四甲基-4-氧代哌啶。 合适的催化剂是路易斯酸，质子酸及其与氨或有机碱的盐。 反应可以在有机溶剂中，优选在丙酮中，通过温和加热，例如在40至65℃下进行。反应几小时后可获得95％的产率。

    3,5-DIALKYL-4-HYDROXYBENZYL-OXIRANES
    4.
    发明授权
    3,5-DIALKYL-4-HYDROXYBENZYL-OXIRANES 失效
    3,5-二烷基-4-羟基苄氧基

    公开(公告)号：US3992420A

    公开(公告)日：1976-11-16

    申请号：US575314

    申请日：1975-05-07

    申请人： Hanns Lind ,  Rolf Hugi ,  Heimo Brunetti

    发明人： Hanns Lind ,  Rolf Hugi ,  Heimo Brunetti

    IPC分类号： C08K5/45 ,  C07D303/14

    CPC分类号： C08K5/45

    摘要： New 3,5-dialkyl-4-hydroxybenzyl-oxiranes and the corresponding thiiranes are used as stabilizers for polymers. The oxiranes are prepared from the corresponding olefins by reaction with percarboxylic acids or from alkali phenoxides and epichlorohydrines. The thiiranes are prepared from the oxiranes by the usual sulfidation methods.

    摘要翻译： 新的3,5-二烷基-4-羟基苄基 - 环氧乙烷和相应的噻咯烷被用作聚合物的稳定剂。 环氧乙烷通过与过羧酸或碱性苯氧化物和表氯醇反应由相应的烯烃制备。 通过通常的硫化方法由环氧乙烷制备硫杂环丁烷。

    Stabilization of poly(mono-olefins)
    6.
    发明授权
    Stabilization of poly(mono-olefins) 失效
    聚（单烯烃）的稳定化

    公开(公告)号：US4131599A

    公开(公告)日：1978-12-26

    申请号：US687823

    申请日：1976-05-19

    申请人： Heimo Brunetti ,  Jean Rody ,  Nobuo Soma ,  Tomoyuki Kurumada

    发明人： Heimo Brunetti ,  Jean Rody ,  Nobuo Soma ,  Tomoyuki Kurumada

    IPC分类号： C08L23/00 ,  C07D211/12 ,  C07D211/14 ,  C07D211/72 ,  C07D211/74 ,  C08K5/00 ,  C08K5/3412 ,  C08K5/3435 ,  C08L101/00 ,  C08K5/34 ,  C07D211/06

    CPC分类号： C08K5/3435

    摘要： Sterically hindered piperidines having at least 5 alkyl groups in ring positions 2,3,5 and 6 are usable as light-stabilizers for organic polymers. The nitrogen may be unsubstituted or may bear a mono- to tetravalent substituent. The compounds can be synthesized by a Wolf-Kishner reduction of polyalkyl 4-oxopiperidines optionally followed by a N-substitution reaction in a second step.The stabilizers are added to the polymers in an amount of from 0.01 to 5% by weight. Preferred is the stabilization of polyolefins, styrene polymers, polyamides and polyurethanes.

    摘要翻译： 在环位置2,3,5和6中具有至少5个烷基的受阻哌啶可用作有机聚合物的光稳定剂。 氮可以是未取代的或可以带有一个到四价的取代基。 可以通过Wolf-Kishner还原多烷基4-氧代哌啶来合成化合物，任选地随后在第二步中进行N-取代反应。