C-16 Artemisinin Derivatives and Their Antimalarial and Cytotoxic Activities: Syntheses of Artemisinin Monomers, Dimers, Trimers, and Tetramers by Nucleophilic Additions to Artemisitene
Nucleophilicadditions of lithium keto and ester enolates and mono- and bifunctional Grignard reagents to artemisitene provided C-16-derived artemisinin monomers, dimers, trimers, and tetramers whose antimalarial and cytotoxic activities have been evaluated.
Structure-activity relationships of the antimalarial agent artemisinin. 1. Synthesis and comparative molecular field analysis of C-9 analogs of artemisinin and 10-deoxoartemisinin
作者:Mitchell A. Avery、Fenglan Gao、Wesley K. M. Chong、Sanjiv Mehrotra、Wilbur K. Milhous
DOI:10.1021/jm00078a017
日期:1993.12
series of C-9 beta-substituted artemisininanalogs (2-21) were synthesized via dianion alkylation of the total synthetic intermediate 57 followed by subsequent ozonolysis/acidification, or by alkylation of the enolate derived from (+)-9-desmethylartemisinin, 2. Inactive acyclic analogs 22 and 23 were synthesized by nucleophilic epoxide opening and the ring contracted analog 24 was prepared by an alternate
Structure−Activity Relationships of the Antimalarial Agent Artemisinin. 5. Analogs of 10-Deoxoartemisinin Substituted at C-3 and C-9
作者:Mitchell A. Avery、Sanjiv Mehrotra、Theresa L. Johnson、Jason D. Bonk、Jeffrey A. Vroman、Robert Miller
DOI:10.1021/jm9603577
日期:1996.1.1
the presence of triethylsilane. In this manner, 10-deoxoartemisinin (3) could be obtained from artemisinin (1) in greater than 95% overall yield. All analogs were tested in vitro against W-2 and D-6 strains of Plasmodium falciparum. Several of the analogs were much more active than the natural product (+)-artemisinin (1) or 10-deoxoartemisinin (3). Conventional structure-activity relationships are discussed