| 发明名称 |
PROCESS FOR THE PREPARATION OF 2,5-DI(PHENYLAMINO)-TEREPHTHALIC ACID AND ITS DIALKYL ESTERS IN HIGH PURITY |
| 摘要 |
A process for the preparation of 2,5-di(phenylamino)terephthalic acid and its dialkyl esters of formula (I): <IMAGE> (I) in which R is a hydrogen atom or a methyl group and R' is a hydrogen atom or a methyl or ethyl group.
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| 申请公布号 |
US5208365(A) |
申请公布日期 |
1993.05.04 |
| 申请号 |
US19920898201 |
申请日期 |
1992.06.11 |
| 申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
FUCHS, HERMANN;GILB, WALTER;ARNDT, OTTO |
| 分类号 |
C07C227/06;C07C227/08;C07C229/58 |
主分类号 |
C07C227/06 |
| 代理机构 |
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代理人 |
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