Cephem derivatives and process for the preparation thereof
摘要
<p>A compound represented by the following formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="30" wi="79" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry> wherein R<Sub>6</Sub> means an amino group or an amino group blocked by a protecting group, and A<Sub>2</Sub> denotes a group represented by the following formula:
<Chemistry id="chema02" num="0002"><Image id="ia02" he="30" wi="140" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry> a compound obtained by blocking -COO<Sup>-</Sup> of the first-mentioned compound with a protecting group, or a salt thereof. The compound can be used as an intermediate for a drug having antibacterial activity.</p>
