Direct Transition-Metal-Free Intramolecular Arylation of Phenols
作者:Gan B. Bajracharya、Olafs Daugulis
DOI:10.1021/ol801897m
日期:2008.10.16
base-mediated intramolecular arylation of phenols with aryl halides has been developed. In the presence of 2.5 equiv of t-BuOK in dioxane at 140 degrees C, the intramolecular cyclization of 3-(2-halobenzyloxy)phenols affords 6H-benzo[c]chromenes in high yields. This reaction proceeds by an initial formation of a benzyne intermediate followed by an aromaticsp(2) C-H functionalization (a formal C-H activation)
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