Design, Synthesis, and <i>in Vitro</i> Biological Evaluation of 14-Hydroxytylophorine-dichloroacetate Co-drugs as Antiproliferative Agents
作者:Ziad Omran、Mohamed Alarja、Ashraf N. Abdalla、Munjed M. Ibrahim、Mohammad A. Hossain、Linwei Chen、Yuxiu Liu、Qingmin Wang
DOI:10.1248/cpb.c19-00520
日期:2019.11.1
Co-drug, or mutual-prodrug, is a drug design approach consisting of covalently linking two active drugs so as to improve the pharmacokinetics and/or pharmacodynamics properties of one or both drugs. Co-drug strategy has proven good success in overcoming undesirable properties such as absorption, poor bioavailability, nonspecificity, and gastrointestine tract (GIT) side effects. In this work, we successfully
A series of phenanthroindolizidine and phenanthroquinolizidine alkaloids and their 14-amino-derivatives (1-44) were prepared and systematically evaluated for their anti-tumor activities against A549 and HL60 cell lines. The bioassay results showed that most of these alkaloids possess good anti-tumor activities. Especially, compounds 15, 22, 28, 33-36, 40 and 42 displayed low nanomolar or subnanomolar levels of anti-tumor activity. The configuration of (13aS,14S)-14-hydroxyphenanthroindolizidines and (14aR,15R)-15-hydroxyphenanthroquinolizidines was confirmed to be optimal. 14-Amino-phenanthroindolizidines with increased polarity possess good anti-tumor activity, especially for compounds 26 and 28. Most of the phenanthroquinolizidine alkaloids exhibited higher anti-tumor activity than that of phenanthroindolizidine alkaloids. Our present study provides fundamental support for development and optimization of phenanthroindolizidine and phenanthroquinolizidine alkaloids as potential anti-tumor drugs. (C) 2012 Elsevier Masson SAS. All rights reserved.
Efficient and Chirally Specific Synthesis of Phenanthro-Indolizidine Alkaloids by Parham-Type Cycloacylation
作者:Ziwen Wang、Zheng Li、Kailiang Wang、Qingmin Wang
DOI:10.1002/ejoc.200900920
日期:2010.1
A concise, efficient and modular route involving Parham-type cycloacylation as the key step has been used to synthesize six enantiopure phenanthro-indolizidine alkaloids 1a-c. The preparation of enantiomericallypure tylophora alkaloids and their seco analogues on a large-scale is now feasible. The alcohol intermediates 8a-c, which are difficult to prepare by other synthetic methodologies, have been