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    Preparation of 5-membered ring heterocycles
    191.
    发明授权
    Preparation of 5-membered ring heterocycles 失效
    五元环杂环的制备

    公开(公告)号：US5453516A

    公开(公告)日：1995-09-26

    申请号：US165463

    申请日：1993-12-13

    Applicant: Rolf Fischer ,  Rolf Pinkos

    Inventor： Rolf Fischer ,  Rolf Pinkos

    IPC: C07D201/02 ,  C07D207/26 ,  C07D207/267 ,  C07D307/33 ,  C07D315/00 ,  C07D207/27 ,  C07D307/28

    CPC classification number: C07D201/02 ,  C07D207/267 ,  C07D307/33 ,  C07D315/00

    Abstract: A process for preparing 5-membered ring heterocycles of the general formula I ##STR1## where R.sup.1 is methyl or hydroxyethyl,R.sup.2,R.sup.3,R.sup.4,R.sup.5 and R.sup.6 are hydrogen, C.sub.1 - to C.sub.12 -alkyl, C.sub.2 - to C.sub.12 -alkenyl, aryl, C.sub.3 - to C.sub.8 -cycloalkyl, C.sub.1 - to C.sub.12 -alkoxy, halogen, C.sub.2 - to C.sub.20 -alkoxycarbonylalkyl, C.sub.2 - to C.sub.20 -alkylcarbonyloxy, formyl, C.sub.2 - to C.sub.20 -formylalkyl, benzoyl or --CH(OR.sup.3)(OR.sup.5), or R.sup.3 and R.sup.5 together are a C.sub.2 - to C.sub.7 -alkylene chain which is unsubstituted or monosubstituted to pentasubstituted by R.sup.4 or a .dbd.CH--CH.dbd.CH--CH.dbd. unit which is unsubstituted or monosubstituted to tetrasubstituted by R.sup.4,X is oxygen or N--R.sup.4by reacting 5-membered ring heterocycles of the general formula II ##STR2## where R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and X have the abovementioned meanings and Y is hydrogen, acetyl or C.sub.2 - to C.sub.20 -alkoxycarbonyl, with dimethyl or ethylene carbonate in the presence of a nitrogen-containing base at from 50.degree. to 300.degree. C. and from 0.01 to 50 bar is described.

    Abstract translation: 其中R 1是甲基或羟乙基，R 2，R 3，R 4，R 5和R 6是氢，C 1 -C 12 - 烷基，C 2 -C 12的通式I（I）的五元环杂环的制备方法 - 烯基，芳基，C 3 -C 8 - 环烷基，C 1 -C 12 - 烷氧基，卤素，C 2 -C 20 - 烷氧基羰基烷基，C 2 -C 20 - 烷基羰氧基，甲酰基，C 2 -C 20甲酰烷基，苯甲酰基或-CH ）（OR 5）或R 3和R 5一起是未被取代或单取代以被R4或a = CH-CH = CH-CH =未被R4单取代或单取代的单元的C2至C7-亚烷基链， X是通过使通式II的5-元环杂环（II）其中R 2，R 3，R 4，R 5，R 6和X具有上述含义并且Y是氢，乙酰基或C 2 - 在含有50〜300℃的含氮碱和0.01〜50巴的存在下，与二甲基或碳酸亚乙酯进行反应。

    Process for preparing lower lactams from allylic amine substrates
    194.
    发明授权
    Process for preparing lower lactams from allylic amine substrates 失效
    从烯丙基胺底物制备低级内酰胺的方法

    公开(公告)号：US4111952A

    公开(公告)日：1978-09-05

    申请号：US745018

    申请日：1976-11-26

    Applicant: John F. Knifton

    Inventor： John F. Knifton

    IPC: C07D201/02 ,  C07D207/26

    CPC classification number: C07D201/02

    Abstract: This invention concerns processes for preparing cyclic, 5-membered ring, lactams through the carbonylation of allylic substrates in the presence of rhodium catalysts.

    Abstract translation: 本发明涉及在铑催化剂存在下通过烯丙基底物的羰基化制备环状5元环，内酰胺的方法。

    Process for the preparation of epsilon-caprolactam
    200.
    发明授权
    Process for the preparation of epsilon-caprolactam 失效
    制备EPSILON-CAPROLACTAM的方法

    公开(公告)号：US3560484A

    公开(公告)日：1971-02-02

    申请号：US83417369

    申请日：1969-06-17

    Applicant: TEIJIN LTD

    Inventor： TANAKA IKUZO ,  UEHARA HIDEO ,  OSAKI HUKUE ,  YAMAGATA MASAYUKI

    IPC: C07D201/02 ,  C07D41/06

    CPC classification number: C07D201/02

    Abstract: CAPROLACTAM IS PREPARED IN A SINGLE STEP WITHOUT FORMATION OF BY-PRODUCT AMMONIUM SULFATE BY CONTACTING 2-NITROCYCLOHEXANONE AND/OR 2-NITROCYCLOHEXEN-1-O1 WITH HYDROGEN AT A TEMPERATURE RANGING FROM 150* TO 300* C. IN THE PRESENCE OF A LIQUID MEDIUM SUCH AS WATER, ALCOHOLS, ETHERS, BENZENE OR MIXTURES THEREOF AND OF AN ACTIVE HYDROGENATION CATALYST, PERFERABLY IN THE FURTHER PRESENCE OF A NITROGEN-CONTAINING BASIC SUBSTANCE SUCH AS AMMONIA. THIS INVENTION RELATS TO A NOVEL PROCESS FOR THE PREPARATION OF E-CAPROLACTAM.

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