Abstract:
:Two rigid analogues of 5-ethylindolobenzazepinone 4, a potent cytotoxic agent and inhibitor of tubulin polymerization, were prepared. The first was the indane derivative 5, in which the ethyl group is attached to the benzo moiety. The second was the pyrrolidine analogue 6, in which the ethyl chain was bound to the lactam nitrogen. While both compounds were considerably less active inhibitors of KB cell growth as compared to 4, inhibition of tubulin polymerization was only moderately reduced. Tubulin docking studies indicated that the aR and aS atropoisomers of 5 and 6 occupy different binding pockets at the colchicine binding site. Conversely, both aS-5 and aS-6 occupy the same binding pocket as aSS-4 but do not benefit from the favorable hydrophobic interactions provided by the C5 alkyl group of 4, thus possibly explaining their lower activities.
journal_name
ACS Med Chem Lettjournal_title
ACS medicinal chemistry lettersauthors
Pons V,Beaumont S,Tran Huu Dau ME,Iorga BI,Dodd RHdoi
10.1021/ml200024ysubject
Has Abstractpub_date
2011-06-05 00:00:00pages
565-70issue
8issn
1948-5875journal_volume
2pub_type
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