Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor–Acceptor Complex
摘要:
A metal- and photocatalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a single electron transfer (SET) event involving a photoexcited electron-donor-acceptor complex between an NHPI ester and a Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. The method provides an operationally simple, robust, and step-economical approach toward the construction of diversely functionalized dihydroquinolinones bearing quaternary centers. A sequential one-pot hydroalkylation-isomerization approach is also offered, giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance were observed in both approaches.
[EN] COMBINATIONS OF HEPATITIS C VIRUS INHIBITORS<br/>[FR] ASSOCIATIONS D'INHIBITEURS DU VIRUS DE L'HÉPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2015005901A1
公开(公告)日:2015-01-15
The present disclosure is generally directed to antiviral compounds, and more specifically directed to combinations of compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such combinations, and methods for inhibiting the function of the NS5A protein.
Biocompatible Photoinduced Alkylation of Dehydroalanine for the Synthesis of Unnatural α-Amino Acids
作者:José A. C. Delgado、José T. M. Correia、Emanuele F. Pissinati、Márcio W. Paixão
DOI:10.1021/acs.orglett.1c01781
日期:2021.7.2
A site-selective alkylation of dehydroalanine to access protected unnatural amino acids is described. The protocol is characterized by the wide nature of alkyl radicals employed, mild conditions, and functional group compatibility. This protocol is further extended to access peptides, late-stage functionalization of pharmaceuticals, and enantioenriched amino acids.
The present disclosure is generally directed to antiviral compounds, and more specifically directed to combinations of compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such combinations, and methods for inhibiting the function of the NS5A protein.
Disclosed are novel compounds of general formula (I) where the symbols are as defined in the specification, their tautomeric forms, their stereoisomers, their pharmaceutically acceptable salts, pharmaceutical compositions containing them, methods for their preparation, use of these compounds in medicine and the intermediates involved in their preparation. The compounds are useful in the treatment of diabetes and related diseases.
作者:Bing Bai、Alexandr Belovodskiy、Mostofa Hena、Appan Srinivas Kandadai、Michael A. Joyce、Holly A. Saffran、Justin A. Shields、Muhammad Bashir Khan、Elena Arutyunova、Jimmy Lu、Sardeev K. Bajwa、Darren Hockman、Conrad Fischer、Tess Lamer、Wayne Vuong、Marco J. van Belkum、Zhengxian Gu、Fusen Lin、Yanhua Du、Jia Xu、Mohammad Rahim、Howard S. Young、John C. Vederas、D. Lorne Tyrrell、M. Joanne Lemieux、James A. Nieman
DOI:10.1021/acs.jmedchem.1c00616
日期:2022.2.24
antivirals that can be readily administered and are active against a broad spectrum of coronaviruses. Described in this Article are novel α-acyloxymethylketone warhead peptidomimetic compounds with a six-membered lactam glutamine mimic in P1. Compounds with potent SARS-CoV-2 3CL protease and in vitro viral replication inhibition were identified with low cytotoxicity and good plasma and glutathione stability