Process for preparing pyrrolidinones
    1.
    发明授权
    Process for preparing pyrrolidinones 失效
    制备吡咯烷酮的方法

    公开(公告)号:US5670656A

    公开(公告)日:1997-09-23

    申请号:US651181

    申请日:1996-05-24

    CPC分类号: C07D207/273

    摘要: A process for the preparation of a compound of general formula II: ##STR1## wherein R.sup.1 is hydrogen, or C.sub.1 -C.sub.10 hydrocarbyl or heterocyclyl having 3 to 8 ring atoms, either of which may optionally be substituted; each R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is independently hydrogen or C.sub.1 -C.sub.4 alkyl; A is an optionally substituted aromatic or heteroaromatic ring system; and R.sup.21 is hydrogen, halogen, OH or OCONHR.sup.1, wherein R.sup.1 is as defined above; the process comprising cyclizing a compound of general formula III: ##STR2## wherein A, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.21 are as defined in general formula II and R.sup.25 is a leaving group such as a halogen atom; under basic conditions.

    摘要翻译: 制备通式II化合物的方法:其中R 1是氢,或C 1 -C 10烃基或具有3至8个环原子的杂环基,其中任一个可任选地被取代; 每个R 2,R 3,R 4和R 5独立地是氢或C 1 -C 4烷基; A是任选取代的芳族或杂芳族环系; 并且R 21是氢,卤素,OH或OCONHR 1,其中R 1如上所定义; 该方法包括使通式III的化合物:其中A,R 2,R 3,R 4,R 5和R 21如通式II中所定义,R 25是离去基团如卤素原子; 在基本条件下