PROCESSES FOR PREPARING MORPHINANS AND INTERMEDIATES THEREOF
    5.
    发明公开
    PROCESSES FOR PREPARING MORPHINANS AND INTERMEDIATES THEREOF 审中-公开
    用于生产吗啡及其中间体

    公开(公告)号:EP1861373A2

    公开(公告)日:2007-12-05

    申请号:EP06735796.2

    申请日:2006-02-23

    CPC classification number: C07D491/10 C07D217/20 C07D221/28 C07D489/02

    Abstract: The present invention is directed to processes for the synthesis of morphinans. In particular, a process for cyclizing a ß,Ϝ-bicyclic ketone compound to form a nordihydrothebainone product using the Grewe cyclization reaction is improved by forming a reaction mixture comprising a ß,Ϝ-bicyclic ketone compound, a cyclizing acid and a water scavenging cyclization additive. In one embodiment, the Grewe transformation occurs in the presence of an acid anhydride as the cyclization additive. Further, the present invention is directed to processes for converting a,ß-bicyclic ketone compounds (e.g., by-products of the Grewe cyclization reaction) to ß,Ϝ-bicyclic ketone compounds, wherein the ß,Ϝ-bicyclic ketone compounds may be recovered to further undergo Grewe cyclization and form the nordihydrothebainone product.

    PROCESS FOR ASYMMETRIC HYDROGENATION OF HEXAHYDROQUINOLINE SALTS
    8.
    发明公开
    PROCESS FOR ASYMMETRIC HYDROGENATION OF HEXAHYDROQUINOLINE SALTS 有权
    程序对HEXAHYDROCHINOLINSALZEN不对称氢化

    公开(公告)号:EP1485357A1

    公开(公告)日:2004-12-15

    申请号:EP03744359.5

    申请日:2003-03-13

    CPC classification number: C07D217/20

    Abstract: The asymmetrical hydrogenation of 1-(4-methoxybenzyl)-3,4,5,6,7,8-hexahydroisoquinolinium salts to yield (S) or (R)-1-(4-methoxybenzyl)-1,2,3,4,5,6,7,8-hexahydroisoquinolinium salts can be effected with superior optical yield by the use of an iridium or rhodium complex catalyst comprising a chiral dipohsphine ligand of the general formula (I) or (II), (S)-1-(4-methoxybenzyl)-1,2,3,4,5,6,7,8-hexahydroisoquinoline and salts thereof are intermediate products in the manufacture of dextromethorphan, a known antitussive agent.

    PICTET-SPENGLER REACTION FOR THE SYNTHESIS OF TETRAHYDROISOQUINOLINES AND RELATED HETEROCYCLIC COMPOUNDS
    9.
    发明授权
    PICTET-SPENGLER REACTION FOR THE SYNTHESIS OF TETRAHYDROISOQUINOLINES AND RELATED HETEROCYCLIC COMPOUNDS 失效
    皮克特 - 施彭格勒反应生产和四氢异亲戚杂环化合物

    公开(公告)号:EP0929527B1

    公开(公告)日:2004-10-27

    申请号:EP97936381.9

    申请日:1997-08-04

    CPC classification number: C07D217/20 C07D217/06

    Abstract: A commercial scale process for the production of tetrahydroisoquinolines and related heterocyclics by reaction, in mildly acidic conditions, of aryl N-sulfonylethylamines in the presence of suitable Lewis acid, and a compound capable of in situ generation of formaldehyde. The process is further characterized by formaldehyde being generated by the reaction of the Lewis acid upon the formaldehyde generating agent, instead of being present as an initial reactant. The process further avoids the presence of initial water which destroys the Lewis acid before it can act upon the formaldehyde generating agent.

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