Process for preparing halogenated cephem derivatives
A 3-halogenated cephem derivative is prepared by causing a halogenating reagent to act on an allenyl β -lactam compound in the presence of a sulfinate ion or thiolate ion capturing agent to obtain the 3-halogenated cephem derivative.
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Page 13
(2008/06/13)
Process for preparing allenyl beta-lactam derivatives
An allenyl β -lactam compound is prepared by reacting the hydroxyl group of a starting β-lactam compound with a reactive functional group derivative of sulfonic acid and reacting the resulting β -lactam compound with a tertiary organic base to obtain an a
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Example 18
(2008/06/13)
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