发明名称 |
Process for preparing azetidinone intermediates. |
摘要 |
<p>Compounds of formula I <IMAGE> wherein R1 and R2 is each H, halo or an organic group, R3 is H or organic group, n=1 or 2, M is a heavy mono- or divalent metal, or M2A wherein M2 is a heavy divalent metal and A is an organic or inorganic group, are prepared by treating a starting penicillin in a solvent with a salt of M1 or M2A in the presence of a base at a temperature of from -70 DEG to 100 DEG C. The azetidinones of formula I are useful intermediates in the synthesis of beta -lactam antibiotics, esp.penem.</p> |
申请公布号 |
EP0188247(A1) |
申请公布日期 |
1986.07.23 |
申请号 |
EP19860100281 |
申请日期 |
1986.01.10 |
申请人 |
FARMITALIA CARLO ERBA S.P.A. |
发明人 |
ALPEGIANI, MARCO;BEDESCHI, ANGELO;PERRONE, ETTORE |
分类号 |
C07D205/08;C07D205/09;C07D205/095;C07D499/00;C07D499/86;C07D499/861;C07D499/87;C07D499/88;C07D499/897;C07F7/18 |
主分类号 |
C07D205/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|