发明名称 |
Process for the preparation of diacylated 4-imidazolin-2-ones |
摘要 |
A process for the preparation of a diacylated 4-imidazolin-2-one of the formula <IMAGE> (I) wherein R1 and R2 independently represent hydrogen, optionally substituted alkyl, cycloalkyl, aryl and alkoxy, which comprises contacting a compound of the formula <IMAGE> (II) wherein R1 and R2 have the previously assigned significance with a source of chlorine at a temperature from 20 DEG to 150 DEG C. in the presence of a radical forming agent or under ultra-violet light and thereafter dehydrohalogenating or dehalogenating the resultant chlorinated product. The diacylated 4-imidazolin-2-ones prepared by the process are useful for photochemical cycloadditions and as intermediates for the preparation of compounds in the biotin series.
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申请公布号 |
US4294973(A) |
申请公布日期 |
1981.10.13 |
申请号 |
US19790101610 |
申请日期 |
1979.12.10 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
SCHOLZ, KARL-HEINZ;HARTMANN, WILLY;HEINE, HANS-GEORG |
分类号 |
C07D233/70;C07D235/02;C07D235/26;(IPC1-7):C07D233/70 |
主分类号 |
C07D233/70 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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