Topographical Mapping of Isoform-Selectivity Determinants for J-Channel-Binding Inhibitors of Sphingosine Kinases 1 and 2
作者:David R. Adams、Salha Tawati、Giacomo Berretta、Paula Lopez Rivas、Jessica Baiget、Zhong Jiang、Aisha Alsfouk、Simon P. Mackay、Nigel J. Pyne、Susan Pyne
DOI:10.1021/acs.jmedchem.9b00162
日期:2019.4.11
which has yet to be defined by structural biology techniques. We have probed these isoform differences with a ligand series derivedfrom the potent SK1-selective inhibitor, PF-543. Here we show how it is possible, even with relatively conservative changes in compound structure, to systematically tune the activity profile of a ligand from ca. 100-fold SK1-selective inhibition, through equipotent SK1/SK2
Chemoselective Synthesis of Unsymmetrical Internal Alkynes or Vinyl Sulfones<i>via</i>Palladium-Catalyzed Cross-Coupling Reaction of Sodium Sulfinates with Alkynes
A highly efficient and mild palladium‐catalyzedcross‐coupling of sodium sulfinates and alkynes for the selective synthesis of unsymmetrical internal alkynes and vinyl sulfones has been developed. This methodology has advantages of easily accessible starting materials, functional group tolerance and a wide range of substrates, which provides rapid access to alkynes and vinyl sulfones.
Photo-Induced Sonogashira CC Coupling Reaction Catalyzed by Simple Copper(I) Chloride Salt at Room Temperature
作者:Arunachalam Sagadevan、Kuo Chu Hwang
DOI:10.1002/adsc.201200683
日期:2012.12.14
conventional thermal Sonogashira CC coupling reaction requires the use of a palladium catalyst and a large amount of ligands. Although there were a few reports describing the use of inexpensive metal catalysts, such as, copper (Cu), iron (Fe), and nickel (Ni), for replacement of palladium (Pd) in the Sonogashira reactions, it was later questioned that the observed effects were due to ppblevels contamination
AMINATION AND HYDROXYLATION OF ARYLMETAL COMPOUNDS
申请人:WILLIAM MARSH RICE UNIVERSITY
公开号:US20180057444A1
公开(公告)日:2018-03-01
In one aspect, the present disclosure provides methods of preparing a primary or secondary amine and hydroxylated aromatic compounds. In some embodiments, the aromatic compound may be unsubstituted, substituted, or contain one or more heteroatoms within the rings of the aromatic compound. The methods described herein may be carried out without the need for transition metal catalysts or harsh reaction conditions.
Alkynes were oxidized efficiently using the catalytic amount of PdCl2 and CuCl2 in PEG-400 in the presence of water, providing excellent yields of the corresponding 1,2-diketones. A variety of alkynes were well-suited substrates for the oxidation under the described conditions. Further, the optimized conditions were successfully utilized for the one-potsynthesis of 2,3-disubstituted quinoxaline derivatives