High yield process for preparing beta-lactam antibiotics having a high purity degree
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United States of America Patent
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Nov 25, 1986
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N/A
app pub date -
Jun 3, 1985
filing date -
Jul 30, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A high yield process for preparing beta-lactam antibiotics having a high purity degree, in particular derivatives of the cephalosporanic and penicillanic acids, of the formula: ##STR1## by condensation of the compounds ##STR2## where X.dbd.H --OCH.sub.3 (suitably blocked), with a chloride of the formula ##STR3## wherein R.dbd.H, OH in which said condensation is carried out in the presence of a nicotinic or isonicotinic base.
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