Total Synthesis of the Ambigols: A Cyanobacterial Class of Polyhalogenated Natural Products
作者:Tobias M. Milzarek、Tobias A. M. Gulder
DOI:10.1021/acs.orglett.0c03784
日期:2021.1.1
The first total synthesis of all members of the cyanobacterial natural product class of the ambigols is described. Key steps of the synthetic strategy are the formation of sterically demanding mono- and bis-iodonium salts to install the required biaryl ether structural elements and Suzuki cross-coupling giving straightforward access to the biaryl bonds. The synthetic methods are also utilized to construct
申请人:The Board of Trustees of the University of Illinois
公开号:US10285986B2
公开(公告)日:2019-05-14
Compositions comprising Formula (I) can be selectively lethal toward a variety of different cancer cell types. The compositions are useful for the management, treatment, control, or adjunct treatment of diseases, where the selective lethality is beneficial in chemotherapeutic therapy.
Chemistry and Biology of Deoxynyboquinone, a Potent Inducer of Cancer Cell Death
作者:Joseph S. Bair、Rahul Palchaudhuri、Paul J. Hergenrother
DOI:10.1021/ja100610m
日期:2010.4.21
Deoxynyboquinone (DNQ) is a potent antineoplastic agent with an unknown mechanism of action. Here we describe a facile synthetic route to this anthraquinone, and we use this material to determine the mechanism by which DNQ induces death in cancer cells. DNQ was synthesized in seven linear steps through a route employing three palladium-mediated coupling reactions. Experiments performed on cancer cells grown in hypoxia and normoxia strongly suggest that DNQ undergoes bioreduction to its semiquinone, which then is re-oxidized by molecular oxygen, forming superoxide that induces cell death. Furthermore, global transcript profiling of cells treated with DNQ shows elevation of transcripts related to oxidative stress, a result confirmed at the protein level by Western blotting. In contrast to most other antineoplastic agents that generate reactive oxygen species (ROS), DNQ potently induces death of cancer cells in culture, with IC50 values between 16 and 210 nM. In addition, unlike the experimental therapeutic elesclomol, DNQ is still able to induce cancer cell death under hypoxic conditions. This mechanistic understanding of DNQ will allow for a more comprehensive evaluation of the potential of direct ROS generation as an anticancer strategy, and DNQ itself has potential as a novel anticancer agent.
COMPOUNDS AND ANTI-TUMOR NQO1 SUBSTRATES
申请人:The Board of Trustees of the
University of Illinois