Precursor-Directed Synthesis of Apoptosis-Initiating N-Hydroxyalkyl Phenylbenzoisoquinolindione Alkaloids
Yu Chen1,2, Hans-Martin Dahse3, Christian Paetz1
1Max-Planck-Institute for Chemical Ecology, NMR/Biosynthesis Group, Hans-Knöll-Straße 8, 07745, Jena, Germany.
Abstract:
A precursor-directed approach to access N-hydroxyalkyl phenylbenzoisoquinolindiones (PBIQs) has been developed. Incubation of plant material of Xiphidium caeruleum with hydroxylamines of various chain lengths (C2 , C4 , C6 , C8 , C10 and C12 ) resulted in 11 new 5-hydroxy- and 5-methoxy PBIQs with different N-hydroxyalkyl side chain lengths. The antiproliferative effect and the cytotoxicity against HUVEC, K-562, and HeLa cell lines of 26 previously reported PBIQs and the 11 newly synthesized N-hydroxyalkyl PBIQs was determined for the first time. The results revealed that introducing long-chain N-aliphatic amine moieties improved the antiproliferative effect and cytotoxicity of PBIQs when compared to derivatives with N-amino acids as side chains.
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