Various ethers and thioethers of dihydroartemisinin were prepared by treating dihydroartemisinin with hydroxy alkyl, substituted phenol, hydroxy aralkyl, hydroxy alkynyl and hydroxy heteroalkyl or thiols in the presence of BF(3)Et(2)O. The thioethers 64 and 65 were further oxidised to the respective sulfoxides. These derivatives were tested in the Plasmodium berghei K-173-infected mice and some active compounds were tested in chloroquine-resistant P yoelii nigeriensis (NS)-infected mice. Initially the compounds were administered subcutaneously and subsequently by the oral route. The antimalarial activity of the compounds 22, 23, 36, 66 and 79 were found to be comparable to that of arteether when tested in the K-173-infected mice. These compounds also showed activity in the P y nigeriensis (NS)-infected mice.
Growth inhibition activity of thioacetal artemisinin derivatives against human umbilical vein endothelial cells
作者:Sangtae Oh、In Howa Jeong、Woon-Seob Shin、Seokjoon Lee
DOI:10.1016/j.bmcl.2003.08.023
日期:2003.11
Thioacetal artemisinin derivatives, in particular, 10alpha-phenylthiodihydroartemisinins (5), 10beta-benzenesulfonyl-9-epidihydroartemisinin (9) and 10alpha-mercaptodihydroartemisinin (11), exhibit good growth inhibition activity against HUVEC proliferation at the concentration level of 1 muM. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis and antiangiogenic activity of thioacetal artemisinin derivatives
作者:Sangtae Oh、In Howa Jeong、Chan Mug Ahn、Woon-Seob Shin、Seokjoon Lee
DOI:10.1016/j.bmc.2004.05.013
日期:2004.7
Various thioacetal artemisinin derivatives can inhibit the angiogenesis and might be angiogenesis inhibitors. In particular, 10 alpha-phenylthiodihydroartemisinins (5), 10 beta-benzenesulfonyl-9-epi-dihydroartemisinin (11) and 10 alpha-mercaptodihydroartemisinin (13) exhibit strong growth inhibition activity against HUVEC proliferation. Compound 11 have a good inhibitiory activity upon HUVEC tube formation