发明名称 |
VERFAHREN ZUR DE-ESTERIFIKATION |
摘要 |
A process to prepare the E isomer of a 3-substituted (6R,7R)-7-phenyl-acetamido-ceph-3-em-4-carboxylic acid from a mixture of the E and Z-isomer of either the corresponding tert-butyl or the corresponding 4-methoxybenzyl ester of a 3-substituted (6R,7R)-7-phenylacetamido-ceph-3-em-4-carboxylate, characterized by the application of a compound selected from the group titanium tetrachloride, tin tetrachloride and tellurium tetrachloride. |
申请公布号 |
DE907654(T1) |
申请公布日期 |
1999.09.16 |
申请号 |
DE19960938143T |
申请日期 |
1996.11.06 |
申请人 |
GIST-BROCADES B.V. |
发明人 |
DE VROOM, ERIC;VAN DER DOES, THOMAS |
分类号 |
C07D499/00;C07D499/08;C07D501/00;C07D501/02;C07D501/04;C07D501/22;C07D501/24 |
主分类号 |
C07D499/00 |
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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