1,4-Benzodiazepines as Inhibitors of Respiratory Syncytial Virus
摘要:
Respiratory syncytial virus (RSV) is the cause of one-fifth of all lower respiratory tract infections worldwide and is increasingly being recognized as a serious threat to patient groups with poorly functioning immune systems. Our approach to finding a novel inhibitor of this virus was to screen a 20 000-member diverse library in a whole cell XTT assay. Parallel assays were carried out in the absence of virus in order to quantify any associated cell toxicity. This identified 100 compounds with IC50's less than 50 mu M. A-33903 (18), a 1,4-benzodiazepine analogue, was chosen as the starting point for lead optimization. This molecule was moderately active and demonstrated good pharmacokinetic properties. The most potent compounds identified from this work were A-58568 (47), A-58569 (44), and A-62066 (46), where modifications to the aromatic substitution enhanced potency, and A-58175 (42), where the amide linker was modified.
Synthesis of Diiodinated All-Carbon 3,3′-Diphenyl-1,1′-spirobiindene Derivatives via Cascade Enyne Cyclization and Electrophilic Aromatic Substitution
作者:Quanzhe Li、Liuzhu Yu、Yin Wei、Min Shi
DOI:10.1021/acs.joc.9b01418
日期:2019.7.19
from the reaction of propargyl alcohol-tethered alkylidenecyclopropanes with iodine. The reaction proceeded through an iodination-initiated cascade intramolecular enyne cyclization and electrophilic aromatic substitution reaction process in 1,2-dichloroethane upon heating, giving desired spirocyclic products in moderate to excellent yields. Further transformation of the obtained products has also been
enantioselective borylative cyclization cascade utilizing cyclicimides has been developed. We employ a highly enantioselective borylcupration process that includes a 1,2-addition to a cyclicimide. The products contain a valuable hemiaminal and boronate handle for further elaborations within a congested framework. This work demonstrates the utility of cyclicimides as simple precursors to unlock access to sought-after
Palladium‐Catalyzed Cascade Reductive and Carbonylative Cyclization of
<i>Ortho</i>
‐Iodo‐Tethered Methylenecyclopropanes (MCPs) Using
<i>N</i>
‐Formylsaccharin as CO Source
作者:Xing Fan、Min Shi、Yin Wei
DOI:10.1002/adsc.201901005
日期:2019.12.17
A palladium‐catalyzedreductive and carbonylative cyclization of ortho‐iodo‐tethered methylenecyclopropanes (MCPs) using N‐formylsaccharin as COsource has been developed, affording the desired indanone derivatives in moderate to good yields with high regio‐ and stereoselectivity and good functional group compatibility.