2,4-Diamino-9H-pyrimido[4,5-b]indol-5-ols: Synthesis, in vitro cytotoxic activity, and QSAR investigations
作者:Bernd Dotzauer、Renate Grünert、Patrick J. Bednarski、Harald Lanig、Jens Landwehr、Reinhard Troschütz
DOI:10.1016/j.bmc.2006.06.051
日期:2006.11
A series of novel 2,4-diaminopyrimido[4,5-b]indol-6-ols has been synthesized and the in vitro cytotoxic activities were evaluated against four human cancer cell lines originating from solid tumors. An increase in activity was observed when a heteroaromatic ring was annulated on side g of the pyrimido[4,5-b]indole system to give compounds with activities comparable to ellipticine and cisplatin. To understand
Synthesis of 3-EWG-Substituted 2-Amino-5-hydroxyindoles via Nenitzescu Reaction
作者:Reinhard Troschütz、Jens Landwehr
DOI:10.1055/s-2005-872074
日期:——
A series of primary ketene aminals 2, substituted with an electron-withdrawing group were reacted with 1,4-benzoquinone (1) yielding new 3-EWG-substituted 2-amino-5-hydroxyindoles 3a-f. Treatment of ethyl 3,3-diaminoacrylate (2a) with naphthoquinone (20a) and heteroaromatic quinones 20b-d afforded [g]annulated 2-aminoindole-3-carboxylates 21a-d.