发明名称 |
PROCESS FOR PREPARING OPTICALLY ACTIVE PENEMS |
摘要 |
<p>Processes for the preparation of a penem derivative of formula I < IMG > wherein n = 0 or 1; R is a carboxy protecting group or H; R1 is hydrogen, a hydrocarbon group substituted or unsubstituted, or lower alkoxy; and R2 is hydrogen, C1 - C5 alkyl, carbamoyl N-substituted by lower alkyl or unsubstituted, or an acyl group; and the pharmaceutically acceptable salts thereof. These processes allow one to prepare stereospecifically only 5R derivatives, and are characterized by R2-introduction at a very late stage in the synthesis, thereby enabling a great number of compounds of formula I to be prepared. Penem derivatives are useful antibacterial agents.</p> |
申请公布号 |
CA1215705(A) |
申请公布日期 |
1986.12.23 |
申请号 |
CA19820417133 |
申请日期 |
1982.12.07 |
申请人 |
FARMITALIA CARLO ERBA S.P.A. |
发明人 |
ALPEGIANI, MARCO;BATTISTINI, CARLO;BEDESCHI, ANGELO;FRANCESCHI, GIOVANNI;FOGLIO, MAURIZIO;ZARINI, FRANCO |
分类号 |
C07D499/897;A61K31/397;A61K31/425;A61K31/43;A61P31/04;C07D205/08;C07D205/09;C07D499/00;C07D499/04;C07D499/06;C07D499/86;C07D499/861;C07D499/87;C07D499/88;C07D499/883;C07F7/18;C07F9/568;(IPC1-7):C07D499/00 |
主分类号 |
C07D499/897 |
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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