955930-05-9Relevant articles and documents
C-H borylation by platinum catalysis
Furukawa, Takayuki,Tobisu, Mamoru,Chatani, Naoto
, p. 332 - 342 (2017)
Herein, we describe the platinum-catalyzed borylation of aromatic C-H bonds. N-Heterocyclic carbene-ligated platinum catalysts are found to be efficient catalysts for the borylation of aromatic C(sp2)-H bonds when bis(pinacolato)diboron is used as the boron source. The most remarkable feature of these Pt catalysts is their lack of sensitivity towards the degree of steric hindrance around the C-H bonds undergoing the borylation reaction. These Pt catalysts allow for the synthesis of sterically congested 2,6-disubstituted phenylboronic esters, which are otherwise difficult to synthesize using existing C-H borylation methods. Furthermore, platinum catalysis allows for the site-selective borylation of the C-H bonds ortho to fluorine substituents in fluoroarene systems. Preliminary mechanistic studies and work towards the synthetic application of this platinum catalyzed C-H borylation process are described.
Hydrogen peroxide activated quinone methide precursors with enhanced DNA cross-linking capability and cytotoxicity towards cancer cells
Wang, Yibin,Fan, Heli,Balakrishnan, Kumudha,Lin, Zechao,Cao, Sheng,Chen, Wenbing,Fan, Yukai,Guthrie, Quibria A.,Sun, Huabing,Teske, Kelly A.,Gandhi, Varsha,Arnold, Leggy A.,Peng, Xiaohua
, p. 197 - 207 (2017/04/07)
Quinone methide (QM) formation induced by endogenously generated H2O2 is attractive for biological and biomedical applications. To overcome current limitations due to low biological activity of H2O2-activated QM