Organotin-catalyzed synthesis of hydroxyalkylamides from lactones via a ring-opening process
作者:Xiayu Liang、Peng Yu、Chen Fu、Yongcun Shen
DOI:10.1016/j.tetlet.2021.152821
日期:2021.3
A new strategy for the facile synthesis of hydroxyalkylamides through the ring-opening reaction of lactone with amine promoted by dibutyltin acetate was developed. A series of hydroxyalkylamide compounds were obtained and the method was successfully applied to the synthesis of pharmaceutically active molecules tyrosinase inhibitor V and HDAC inhibitor VI via a three-step synthetic pathway. The broad
Design, synthesis, and evaluation of novel small molecule inhibitors of the influenza virus protein NS1
作者:Joseph J. Jablonski、Dipwanita Basu、Daniel A. Engel、H. Mario Geysen
DOI:10.1016/j.bmc.2011.10.026
日期:2012.1
Influenza is a continuing world-wide public health problem that causes significant morbidity and mortality during seasonal epidemics and sporadic pandemics. The existing vaccination program is variably effective from year to year, and drug resistance to available antivirals is a growing problem, making the development of additional antivirals an important challenge. Influenza virus non-structural protein 1 (NS1) is the centerpiece of the viral response to the host interferon (IFN) system. NS1 was demonstrated previously to be a potential therapeutic target for antiviral therapy by the identification of specific small-molecule inhibitors. One inhibitory compound, NSC125044, was subjected to chemical evaluation. Initial synthetic work comprised simplifying the core structure by removing unwanted functionality and determination of key features important for activity. Several subclasses of molecules were designed and synthesized to further probe activity and develop the basis for a structure-activity relationship. Apparent potency, as judged by activity in virus replication assays, increased dramatically for some analogs, without cytotoxicity. Results suggest that the target binding site tolerates hydrophobic bulk as well as having a preference for weakly basic substituents. (C) 2011 Elsevier Ltd. All rights reserved.
Direct Reaction of Aryl Iodides with Activated Aluminium Powder and Reactions of the Derived Aryl Sesquiiodides
作者:Simon Woodward、Xiaoping Tang、Daniel Rawson
DOI:10.1055/s-0029-1219179
日期:2010.3
High temperature (110-120 ËC) direct reaction of ArI (Ar = Ph, 1-C10H7, 3-Tol) with aluminium powder in the presence of HgCl2 (1 mol%) or liquid gallium metal (10 mol%) leads to quantitative conversion to the aryl sesquiiodides Al2Ar3I3. The latter, highly Lewis acidic, compounds are effective in opening of cyclic ethers and direct ester to amide conversions.