New chemical and biological aspects of artemisinin-Derived trioxane dimers
摘要:
Joining two 10-deoxoartemisinin trioxane units via a p-diacetylbenzene linker produces new C-10 non-acetal dimers 3b and 3c. H-1 NMR spectroscopy allows unambiguous assignment of the stereochemistry at C-10 in these dimers. Successful replacement of both carbonyl oxygen atoms in these diketone dimers by fluorine atoms produces new tetrafluorinated dimers 5a and 5b. Each dimer was evaluated in vitro for antimalarial, antiproliferative, and antitumor activities; ketone dimers 3b and 3c, more than fluorinated dinners 5a and 5b, are promising for chemotherapy of both malaria and cancer. (C) 2001 Elsevier Science Ltd. All rights reserved.
A new synthetic route to 10β-alkyldeoxoartemisinins
作者:Jingyuan Ma、Esther Katz、Herman Ziffer
DOI:10.1016/s0040-4039(99)01824-9
日期:1999.12
Artemisinin was reduced with DIBAL and acetylated to yield 10 alpha-acetoxyartemisinin. The latter compound was treated with titanium tetrachloride and a series of trimethylsiloxyl enol ethers to produce a series of 10 beta-alkyldeoxoartemisinins. (C) 1999 Elsevier Science Ltd. All rights reserved.