Structure−Activity Relationship Studies of Novel Carbocyclic Influenza Neuraminidase Inhibitors
摘要:
A series of influenza neuraminidase inhibitors with the cyclohexene scaffold containing lipophilic side chains have been synthesized anti evaluated for influenza A and B neuraminidase inhibitory activity. The size and geometry of side chains have been modified systematically in order to investigate structure-activity relationships of this class of compounds. The X-ray crystal structures of several analogues complexed with neuraminidase revealed that the lipophilic side chains bound to the hydrophobic pocket consisted of Glu276, Ala246, Arg224, and Ile222 of the enzyme active site. The structure-activity relationship studies of this series have also demonstrated remarkably different inhibitory potency between influenza A and B neuraminidase. This indicated that the lipophilic side chains had quite different hydrophobic interactions with influenza A and B neuraminidase despite their complete homology in the active site. Influenza B neuraminidase appeared to be much more sensitive toward the increased steric bulkiness of inhibitors compared to influenza A neuraminidase. From the extensive structure-activity relationship investigation reported in this article, GS 4071 emerged as one of the most potent influenza neuraminidase inhibitors against both influenza A and B strains.
Enantio- and Diastereoselective Synthesis of 1,5-<i>syn</i>-(<i>Z</i>)-Amino Alcohols via Imine Double Allylboration: Synthesis of <i>trans</i>-1,2,3,6-Tetrahydropyridines and Total Synthesis of Andrachcine
作者:Christophe Allais、William R. Roush
DOI:10.1021/acs.orglett.7b00995
日期:2017.5.19
A stereoselective synthesis of trans-1,2,3,6-tetrahydropyridines 8 is described. This synthesis proceeds via intramolecular Mistunobu reactions of 1,5-syn-(Z)-amino alcohols 7, which were prepared by a highly diastereo- and enantioselective double-allylboration reaction of aldehyde 5 and silylimine 6. The chiral bifunctional γ-borylallylborane 9E was generated in situ by hydroboration of allene 3 with
The invention provides methods for storing boranes (e.g. B-allyldiisopinocampheylborane). The invention also provides stable compositions comprising boranes, as well as methods for carrying out allylboration at high temperature and/or in the presence of water.
Synthesis and Biological Evaluation of Dichlorinated Chondramide Derivatives
作者:Dominic Becker、Uli Kazmaier
DOI:10.1002/ejoc.201500369
日期:2015.7
Straightforward synthetic protocols for the synthesis of new ethyl-substituted dichlorinatedchondramides with different methyl-substitution patterns in the polyketide fragment have been developed. The methyl groups at the ϵ-position can be removed completely without a significant influence on the biological activity. In contrast, after removal of the α-methyl group, a significant drop in activity
Chiral synthesis via organoboranes. 24. B-allylbis(2-isocaranyl)borane as a superior reagent for the asymmetric allylboration of aldehydes
作者:Herbert C. Brown、Ramnarayan S. Randad、Krishna S. Bhat、Marek Zaidlewicz、Uday S. Racherla
DOI:10.1021/ja00162a047
日期:1990.3
Le reactif utilise : l'(allyl bis-isocaranyl) borane est prepare a partir du (+)-carene-2 obtenu par isomerisation du (+)-carene-3
Le reactif利用:l'(allyl bis-isocaranyl) borane est prepare a partir du (+)-carene-2 obtenu par isomerisation du (+)-carene-3
Stereospecific synthesis of a GS 4104 metabolite: Determination of absolute sterochemistry and influenza neuraminidase inhibitory activity
作者:Willard Lew、Paul A. Escarpe、Dirk B. Mendel、David J. Sweeny、Choung U. Kim
DOI:10.1016/s0960-894x(99)00479-5
日期:1999.10
The total synthesis for the determination of the absolute stereochemistry of a GS 4104 metabolite 3 is described. In addition, the influenza neuraminidase inhibitory activity of 3 and related intermediates are reported.