发明名称 |
Process for the preparation of substituted benzene sulfonic acid, derivatives thereof and N,N'-substituted ureas |
摘要 |
A process for the preparation of substituted benzenes or benzenesulfonic acid and its derivatives comprising diazotisation of an aminobenzene or ortho-amino-benzenesulfonic acid derivative followed by homogeneous palladium-catalysed coupling with an olefine and heterogeneous palladium-catalysed hydrogenation of the olefinic substituent, wherein the homogeneous catalyst is reduced and precipitated as metal after the coupling in the reaction mixture and used as a heterogeneous palladium catalyst for the hydrogenation step. The process is particular suitable for the preperation N-benzenesulfon-N'-triazinyl-urea herbicides. |
申请公布号 |
MD902(B2) |
申请公布日期 |
1998.01.31 |
申请号 |
MD19930000054 |
申请日期 |
1993.08.16 |
申请人 |
NOVARTIS AG, |
发明人 |
BAUMEISTER, PETER,;SEIFERT, GOTTFRIED,;STEINER, HEINZ, |
分类号 |
C07B35/02;C07B37/04;C07B43/00;C07B47/00;C07B61/00;C07C245/12;C07C245/20;C07C303/22;C07C303/32;C07C309/39;C07D251/16;C07D251/18;C07D251/22;C07D251/46;C07D251/52;(IPC1-7):C07C309/30;A01N41/04;A01N47/28 |
主分类号 |
C07B35/02 |
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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