Journal
ORGANIC LETTERS
Volume 11, Issue 18, Pages 4232-4235Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol901702k
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A stereoselective synthesis of enantiopure aeruginosin 205B aglycon confirms the presence of a (3R,2S)-3-chloroleucine amide residue and a (6R)-hydroxy (4aR,7aS)-octahydroindole-(2S)-2-carboxamide (Choi) subunit instead of a 6-chloro-substituted core (Ccoi). Enzyme inhibitory tests against thrombin revealed an IC50 of 0.31 mu M. The total synthesis of the presumed aeruginosin 205B shows that the alpha-D-xylopyranosyl unit carries a sulfate group at C4' (and not at C-3'). Comparison of NMR data leads to the same revision of aeruginosin 205A.
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