Three-Component One-Pot Synthesis of Unsymmetrical Diarylalkynes by Thermocontrolled Sequential Sonogashira Reactions Using Potassium Ethynyltrifluoroborate
作者:Taejung Kim、Kyu Hyuk Jeong、Youngseok Kim、Taesub Noh、Jaeyoung Choi、Jungyeob Ham
DOI:10.1002/ejoc.201700110
日期:2017.5.3
Sonogashira reactions with potassium ethynyltrifluoroborate and two different reactive aryl halides. The one-pot procedure was initiated by the palladium/copper-catalyzed Sonogashira coupling of potassium ethynyltrifluoroborate to an aryliodide or electron-deficient aryl bromide at 40 °C. Following a subsequent deboronative Sonogashira reaction of the in situ generated potassium (arylethynyl)trifluoroborate
The Fight against the Influenza A Virus H1N1: Synthesis, Molecular Modeling, and Biological Evaluation of Benzofurazan Derivatives as Viral RNA Polymerase Inhibitors
The influenzaRNApolymerase complex, which consists of the three subunits PA, PB1, and PB2, is a promising target for the development of new antiviral drugs. A large library of benzofurazan compounds was synthesized and assayed againstinfluenzavirus A/WSN/33 (H1N1). Most of the new derivatives were found to act by inhibiting the viralRNApolymerase complex through disruption of the complex formed
The catalytic reactions proceed with good yields with a low catalyst loading (1 mol%) under aerobic and CuI-free conditions for Sonogashira and Heck reactions.
HYDROXYLATED TOLANS AND RELATED COMPOUNDS IN THE TREATMENT OF A CANCER
申请人:Tsai Chun-Che
公开号:US20110130468A1
公开(公告)日:2011-06-02
Compounds of the hydroxytolan family kill tumor cells, inhibit tumor growth and development, and are thus useful in method for treating a tumor or cancer in subjects in need thereof. These compounds are also active in preventing or treating a variety of skin diseases and conditions. The most preferred hydroxytolan compounds are 4,4′-dihydroxytolan. (KST-201), 4 hydroxy 4′ trifluoromethyltolan or 4′ hydroxy 4 trifluoromethyltolan (KST-213), 3,4′,5-trihydroxytolan or 3′,4,5′-trihydroxytolan (KST-301) and 3,3′,5,5′-tetrahydroxytolan (KST-401). The compounds and methods of using them alone and in combination with ascorbate and certain cyclic compounds to inhibit the development, growth or metastasis of tumor/cancer or preneoplastic cells, or to prevent or treat skin disorders in a subject are disclosed.