Fluorine Scan of Inhibitors of the Cysteine Protease Human Cathepsin L: Dipolar and Quadrupolar Effects in the π-Stacking of Fluorinated Phenyl Rings on Peptide Amide Bonds
the S3 pocket, was systematically fluorinated, and differences in inhibitory potency were measured in a fluorimetric assay. Binding affinity is influenced by lipophilicity (clog P), the dipole and quadrupole moments of the fluorinated rings, but also by additional interactions of the introduced fluorine atoms with the local environment of the pocket. Generally, the higher the degree of fluorination
series are introduced to extract the individual contributions of halogenbonds and anion–πinteractions to the transport of anions across lipid bilayer membranes (see picture). Known cation binding sites are used for counterion activation of the neutral calix[4]arene transporters. The experimental evidence for anion transport with halogenbonds is unprecedented.
Selective hydrogenation of benzene di- and tri-methanol compounds
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0152174A2
公开(公告)日:1985-08-21
57 Benzene di- and tri-methanol compounds are selectively halogenated by reaction in aqueous solution at 70 to below 100°C with NCl or HBr in the presence of a water immiscible solvent eg. toluene. The process is particularly suitable for the preparation of 4-bromo- and 4-chloromethyl-2,3,5,6-tetrafluorobenzene methanols which are believed to be novel compounds and useful in the synthesis of pesticidal compounds.
Palladium-Catalyzed Cross-Coupling of Polyfluoroarenes with Simple Arenes
作者:Hu Li、Jia Liu、Chang-Liang Sun、Bi-Jie Li、Zhang-Jie Shi
DOI:10.1021/ol102688e
日期:2011.1.21
The most efficient method to construct biaryls is the direct dehydrogenative cross-coupling of two different aromatic rings. Such an ideal cross arylation starting from distinct polyfluoroarenes and simple arenes was presented. The selectivity of the cross-coupling was controlled by both of the electronic property of fluoroarenes and steric hindrance of simple arenes. Diisopropyl sulfide was essential to promote the efficacy.