15877-57-3Relevant articles and documents
Mutual influence of backbone proline substitution and lipophilic tail character on the biological activity of simplified analogues of caspofungin
Mulder, Monique P. C.,Fodran, Peter,Kemmink, Johan,Breukink, Eefjan J.,Kruijtzer, John A. W.,Minnaard, Adriaan J.,Liskamp, Rob M. J.
, p. 7491 - 7502 (2012)
The echinocandins represent the most recent class of antifungal drugs. Previous structure-activity relationship studies on these lipopeptides have relied mainly upon semisynthetic derivatives due to their complex chemical structures. A successful strategy for the rapid enantioselective synthesis of the branched fatty acid chain of caspofungin and analogues was developed to synthesize several simplified analogues of caspofungin. The specific minimum inhibitory activity of each mimic was determined against a panel of Candida strains. This approach gave access to new fully synthetic derived caspofungin mimics with high and selective antifungal activities against Candida strains. In addition, the data suggested an important role of the hydroxy proline residue in the bioactive conformation of the macrocyclic peptide ring structure.
Carbon chain shape selectivity by the mouse olfactory receptor OR-I7
Liu, Min Ting,Ho, Jianghai,Liu, Jason Karl,Purakait, Radhanath,Morzan, Uriel N.,Ahmed, Lucky,Batista, Victor S.,Matsunami, Hiroaki,Ryan, Kevin
supporting information, p. 2541 - 2548 (2018/04/12)
The rodent OR-I7 is an olfactory receptor exemplar activated by aliphatic aldehydes such as octanal. Normal alkanals shorter than heptanal bind OR-I7 without activating it and hence function as antagonists in vitro. We report a series of aldehydes designed to probe the structural requirements for aliphatic ligand chains too short to meet the minimum approximate 6.9 ? length requirement for receptor activation. Experiments using recombinant mouse OR-I7 expressed in heterologous cells show that in the context of short aldehyde antagonists, OR-I7 prefers binding aliphatic chains without branches, though a single methyl on carbon-3 is permitted. The receptor can accommodate a surprisingly large number of carbons (e.g. ten in adamantyl) as long as the carbons are part of a conformationally constrained ring system. A rhodopsin-based homology model of mouse OR-I7 docked with the new antagonists suggests that small alkyl branches on the alkyl chain sterically interfere with the hydrophobic residues lining the binding site, but branch carbons can be accommodated when tied back into a compact ring system like the adamantyl and bicyclo[2.2.2]octyl systems.
An amphiphilic pillar[5]arene as efficient and substrate-selective phase-transfer catalyst
Ogoshi, Tomoki,Ueshima, Naosuke,Yamagishi, Tada-Aki
supporting information, p. 3742 - 3745 (2013/08/23)
An amphiphilic macrocyclic compound consisting of 10 tetra-alkyl phosphonium bromide groups and a pillar[5]arene core was prepared. This compound was soluble in both aqueous and organic media and acted as a highly efficient and substrate-selective phase-transfer catalyst. In particular, oxidation of the linear alkene1-hexene to 1-pentanal by KMnO4 was >99%, whereas that of the branched alkene 4-methyl-1-hexene was only 31%, under ideal conditions.
