Discovery of benzylisothioureas as potent divalent metal transporter 1 (DMT1) inhibitors
作者:Zaihui Zhang、Vishnumurthy Kodumuru、Serguei Sviridov、Shifeng Liu、Mikhail Chafeev、Sultan Chowdhury、Nagasree Chakka、Jianyu Sun、Simon J. Gauthier、Maryanne Mattice、Laszlo G. Ratkay、Rainbow Kwan、Jay Thompson、Alison Brownlie Cutts、Jianmin Fu、Rajender Kamboj、Y. Paul Goldberg、Jay A. Cadieux
DOI:10.1016/j.bmcl.2012.05.129
日期:2012.8
Inhibition of intestinal brush border DMT1 offers a novel therapeutic approach to the prevention and treatment of disorders of iron overload. Several series of diaryl and tricyclic benzylisothiourea compounds as novel and potent DMT1 inhibitors were discovered from the original hit compound 1. These compounds demonstrated in vitro potency against DMT1, desirable cell permeability properties and a dose-dependent
Efficient Access to Substituted Silafluorenes by Nickel-Catalyzed Reactions of Biphenylenes with Et<sub>2</sub>SiH<sub>2</sub>
作者:Jens Michael Breunig、Puneet Gupta、Animesh Das、Samat Tussupbayev、Martin Diefenbach、Michael Bolte、Matthias Wagner、Max C. Holthausen、Hans-Wolfram Lerner
DOI:10.1002/asia.201402599
日期:2014.11
[Ni(PPhMe2)4]‐catalyzed reaction of Et2SiH2 and 1‐methylbiphenylene. By contrast, no selectivity could be found in the Ni‐catalyzed reaction between Et2SiH2 and the biphenylene derivative that bears tBu substituents in the 2‐ and 7‐positions. Therefore, two pairs of isomers of tBu‐substitutedsilafluorenes and of the related diethylhydrosilylbiphenyls were formed in this reaction. However, a subsequent
Iridium-Catalyzed Formal [4 + 1] Cycloaddition of Biphenylenes with Alkenes Initiated by C–C Bond Cleavage for the Synthesis of 9,9-Disubstituted Fluorenes
作者:Hideaki Takano、Kyalo Stephen Kanyiva、Takanori Shibata
DOI:10.1021/acs.orglett.6b00619
日期:2016.4.15
An Ir-catalyzed intermolecular reaction of biphenylenes as a C4 unit with various alkenes as a C1 unit gave 9,9-disubstituted fluorenes in moderate to high yields. Preliminary mechanistic studies revealed that this formal [4 + 1] cycloaddition probably proceeds via C–C bond cleavage, alkene insertion, β-hydrogen elimination, intramolecular alkene insertion, and then reductive elimination. An example
TRICYCLIC COMPOUNDS USEFUL IN TREATING IRON DISORDERS
申请人:Chafeev Mikhail
公开号:US20090069408A1
公开(公告)日:2009-03-12
This invention is directed to, for example, compounds of formula (I):
wherein n, m, R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and R
8
are as defined herein, as a stereoisomer, enantiomer, tautomer thereof or mixtures thereof; or a pharmaceutically acceptable salt, solvate or prodrug thereof, for the treatment of iron disorders. This invention is also directed to pharmaceutical compositions comprising the compounds and methods of using the compounds to treat iron disorders.
A nickel-catalyzed three-component carboamination of the biphenylene C–C σ-bond has been developed. Arylboronates and hydroxylamine derivatives work as carbon nucleophiles and nitrogen electrophiles, respectively, and the corresponding difunctionalized ring-opening products are obtained in good yields. The arylboronate nucleophile can be replaced with B2pin2 (boron nucleophile) and H–Si(OMe)3 (hydride