Direct conversion of pyranose anomeric OH→F→R in the artemisinin family of antimalarial trioxanes
摘要:
Eleven examples form the basis of a short and effective synthetic method for replacement of an anomeric fluorine atom by saturated, unsaturated, aryl and heteroaryl carbon nucleophiles to prepare alpha- or beta-oriented C-10-R derivatives of the trioxane 10-deoxoartemisinin. (C) 1998 Elsevier Science Ltd. All rights reserved.
Stereoselective Preparation of 10α- and 10β-Aryl Derivatives of Dihydroartemisinin
作者:Richard K. Haynes、Ho-Wai Chan、Man-Ki Cheung、Shuk Ting Chung、Wai-Lun Lam、Hing-Wo Tsang、Arnd Voerste、Ian D. Williams
DOI:10.1002/ejoc.200300064
日期:2003.6
less effectively, the 10α-benzoate of dihydroartemisinin [DHA] with activated aromatic compounds, including naphthalenes, stereoselectively, provides 10α-aryl derivatives including disubstituted naphthalene derivatives. 2-Methoxynaphthalene provides the 1-, rather than the 3-substituted derivative. In contrast, 10β-arylderivatives are obtained stereoselectively from the 10β-bromide, generated in situ
A possible antimalarial action mode of qinghaosu (artemisinin) series compounds. Alkylation of reduced glutathione by C-centered primary radicals produced from antimalarial compound qinghaosu and 12-(2,4-dimethoxyphenyl)-12-deoxoqinghaosu
作者:Dong-Ye Wang、Yu-Lin Wu
DOI:10.1039/b006906j
日期:——
Antimalarial compound qinghaosu (1) and its phenyl derivative 2 were reacted with reduced glutathione (GSH) and Fe(II/III) to give, besides other known degradationproducts, an interesting adduct from a primary C-centered free radical and GSH. Because GSH plays a very important role in the cell cycle, this finding may eventually lead to a new understading of its mode of action.
Antimalarial, Antiproliferative, and Antitumor Activities of Artemisinin-Derived, Chemically Robust, Trioxane Dimers
作者:Gary H. Posner、Poonsakdi Ploypradith、Michael H. Parker、Hardwin O'Dowd、Soon-Hyung Woo、John Northrop、Mikhail Krasavin、Patrick Dolan、Thomas W. Kensler、Suji Xie、Theresa A. Shapiro
DOI:10.1021/jm990363d
日期:1999.10.1
Nine C-10 non-acetal derivatives of the natural trioxane artemisinin (1) were prepared as dimers using some novel chemistry. As designed, each dimer was stable chemically. C-10 Olefinic dimers 7 and C-10 saturated dimers 8-13 all showed good to excellent antimalarial and antiproliferative activities in vitro. Dimers 8, 10, and 12 were especially potent and selective at inhibiting growth of some human cancer cell lines in the NCI in vitro 60-cell line assay.
Direct conversion of pyranose anomeric OH→F→R in the artemisinin family of antimalarial trioxanes
作者:Soon Hyung Woo、Michael H. Parker、Poonsakdi Ploypradith、John Northrop、Gary H. Posner
DOI:10.1016/s0040-4039(98)00132-4
日期:1998.3
Eleven examples form the basis of a short and effective synthetic method for replacement of an anomeric fluorine atom by saturated, unsaturated, aryl and heteroaryl carbon nucleophiles to prepare alpha- or beta-oriented C-10-R derivatives of the trioxane 10-deoxoartemisinin. (C) 1998 Elsevier Science Ltd. All rights reserved.
Further evidence for the participation of primary carbon-centered free radicals in the antimalarial action of the qinghaosu (artemisinin) series of compounds
作者:Dong-Ye Wang、Yu-Lin Wu、Yikang Wu、Jie Liang、Ying Li
DOI:10.1039/b008145k
日期:——
artemether. Compound 2 reacted smoothly with ferrous ions or L-cysteine and catalytic amounts of ferrous ions to give a series of products derived from the previously postulated C-centered free radical, in particular the primary C-centered free radical. However, 11α-epimer 2′ was almost inert to ferrous ions and also showed low antimalarial activity. The identification of free radical mediated products