发明名称 |
PROCESS FOR THE PREPARATION OF BROMOISOPHTHALIC ACID COMPOUNDS |
摘要 |
The present invention relates to a process for preparing bromoisophthalic acid compounds, particularly 5- bromoisophthalic acid compounds and 4,5-dibromoisophthalic acid compounds comprising brominating an isophthalic acid compound of the general formula (1) <CHEM> wherein R<1> and R<2> independently of one another are hydrogen atom or C1-6 alkyl, with bromine in a solvent containing sulfur trioxide. The object of the invention is to provide a process for preparing bromoisophthalic acid compounds, particularly 5-bromoisophthalic acid compounds and 4,5-dibromoisophthalic acid compounds in a highly selective manner by using bromine that is industrially inexpensive. |
申请公布号 |
EP1293495(B1) |
申请公布日期 |
2013.04.24 |
申请号 |
EP20010934410 |
申请日期 |
2001.05.30 |
申请人 |
NISSAN CHEMICAL INDUSTRIES, LTD. |
发明人 |
NAGAI, MASAKI;SUZUKI, HIDEO;HASHIBA, ISAO |
分类号 |
C07K5/06;C07C51/363;C07C67/307 |
主分类号 |
C07K5/06 |
代理机构 |
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代理人 |
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