| 发明名称 |
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| 摘要 |
A compound represented by the formula (II) epimerizes by the action of a base and the product is precipitated for shifting the equilibrium to yield the corresponding epimer represented by the formula (I). <IMAGE> (II) <IMAGE> (I) wherein Ar is an optionally substituted aryl or heterocyclic group; Tet is an optionally substituted tetrazolyl group and B1 and B2 are each ester forming group in the field of penicillin or cephalosporin chemistry. |
| 申请公布号 |
JPH0149271(B2) |
申请公布日期 |
1989.10.24 |
| 申请号 |
JP19820116048 |
申请日期 |
1982.07.02 |
| 申请人 |
SHIONOGI & CO |
发明人 |
NARISADA MASAYUKI;ONOE HIROSHI;OOTANI MITSUAKI;WATANABE FUMIHIKO |
| 分类号 |
C07D505/02;C07B31/00;C07B57/00;C07C67/00;C07D498/04;C07D505/00;C07D505/20 |
主分类号 |
C07D505/02 |
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