发明名称 |
Process for preparing cephalosporins |
摘要 |
Novel 3-acyloxymethyl-cephem compounds of the formula: <IMAGE> wherein R1 is hydrogen or an acyl group; W is acetonyl, or a group represented by -X-COOH or -X-OH (X is an organic residue) or salts thereof were found to be useful as starting materials for preparing cephalosporins of the formula: <IMAGE> wherein R3 stands for a residue nucleophilic compound and R1 has the same meaning as above.
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申请公布号 |
US4323676(A) |
申请公布日期 |
1982.04.06 |
申请号 |
US19800182616 |
申请日期 |
1980.08.29 |
申请人 |
TAKEDA CHEMICAL INDUSTRIES, LTD. |
发明人 |
TSUSHIMA, SUSUMU;SENDAI, MICHIYUKI;SHIRAISHI, MITSURU |
分类号 |
C07D501/04;C07D501/20;C07D501/26;(IPC1-7):C07D501/20 |
主分类号 |
C07D501/04 |
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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