发明名称 |
PROCESS FOR PREPARING NITRO BENZOIC ACID ALKYL ESTERS |
摘要 |
<p>Alkyl(C1-C3) nitrobenzoates are prepared by reacting the nitrobenzoic acid to be esterified with an excess of about 300 to about 600 mol % of a C1-C3-alkanol in a solvent which is inert towards the starting compounds and the reaction product in the presence of a polyfluoroalkanesulphonic acid of the general formula (1> Y(CnF2n)SO3H (1> in which Y denotes a hydrogen or fluorine atom, with the proviso that if Y is H this hydrogen atom is in the beta -position relative to the sulpho group, or the hydrate thereof as catalyst in an amount of about 0.1 to about 20 mol %, relative to the nitrobenzoic acid used, at temperatures of about 60 to about 120 DEG C.</p> |
申请公布号 |
EP0394985(B1) |
申请公布日期 |
1993.04.07 |
申请号 |
EP19900107816 |
申请日期 |
1990.04.25 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
PAPENFUHS, THEODOR, DR.;HESS, REINER, DR.;FUSS, ANDREAS, DR. |
分类号 |
B01J31/02;C07B61/00;C07C201/12;C07C205/57 |
主分类号 |
B01J31/02 |
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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