Selenoindirubins and selenoindirubin-N-glycosides were prepared by the reaction of isatins and isatin-N-glycosides with 3-acetoxy-benzo[b]selenophene, respectively. While selenoindirubin-N-glycosides have not been reported before, three non-glycosylated selenoindirubins were previously reported, but without quantities, yields, scales, experimental details and spectroscopic data. In addition, the work could, in our hands, not be reproduced to prepare pure products. The present paper includes an optimized procedure for the synthesis of selenoindirubins and their complete characterization. Both selenoindirubins and selenoindirubin-N-glycosides showed antiproliferative activity in lung cancer cell lines. In melanoma cells, antiproliferative effects were further accompanied by induced apoptosis in combination with the death ligand TRAIL.
N-Glycosyl-3-alkylideneoxindoles, N-glycosylated 3-(2-oxo-2-arylethylidene)indolin-2-ones, were prepared by reaction of isatin-N-glycosides with substituted acetophenones.
作者:Dennis Kleeblatt、Baraa Siyo、Martin Hein、Viktor O. Iaroshenko、Jamshed Iqbal、Alexander Villinger、Peter Langer
DOI:10.1039/c2ob25866h
日期:——
The first N,Nâ²-diglycosylated isoindigos were prepared by P(NEt2)3-mediated dimerization of acetyl protected N-glycosyl-5-alkylisatins. Subsequent deacetylation yielded the corresponding deprotected N,Nâ²-diglycosylated isoindigos. Isatine-N-glycosides containing an unsubstituted or alkyl-substituted heterocyclic moiety and β-D-manno- and β-L-rhamno configured carbohydrate substituents were successfully transformed into the corresponding isoindigos. In contrast, isatins with β-D-gluco- or β-D-xylo configured substituents failed to give the desired products.
by condensation of N‐glycosylisatines with thiaindane‐3‐one and subsequent deprotection, were tested for their activity against malignant melanomacells. These indirubin‐N‐glycoside thia‐analogues are active against melanomacells, inducing growth arrest, apoptosis and inhibition of intracellular signal transduction.
protocol has been developed for the synthesis of 3-arylamino-2-polyhydroxyalkyl-substituted indoles by using unprotected sugars and aromatic amines. The protocol is simple to carry out with high yields under mild reaction conditions, and has atom economy with a good substrate scope and functional group tolerance, providing a new alternative route for the synthesis of structurally diverse indole derivatives