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Synlett 1998; 1998(3): 319-321
DOI: 10.1055/s-1998-1620
DOI: 10.1055/s-1998-1620
letter
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Novel Preparation of 1,1-Dioxo-7α-methoxy-3-methyl-Δ3-cephem-4-yl Aryl Ketones
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Publikationsverlauf
Publikationsdatum:
31. Dezember 2000 (online)
![](https://www.thieme-connect.de/media/synlett/199803/lookinside/thumbnails/10.1055-s-1998-1620-1.jpg)
1,1-Dioxo-7α-methoxy-3-methyl-Δ3-cephem-4-yl phenyl ketone, a valuable precursor of potent HLE inhibitors, was obtained in an efficient way starting from 7α-methoxy-3-methyl-Δ3-cephem-4-carboxylic acid. By employing the same methodology a variety of 1,1-dioxocephem-4-yl aryl ketones were prepared.
cephems - 1,1-dioxocephem aryl ketones - acylation - decarboxylation - protease inhibitors