Autotandem Catalysis: Inexpensive and Green Access to Functionalized Ketones by Intermolecular Iron‐Catalyzed Amidoalkynylation/Hydration Cascade Reaction via
<i>N</i>
‐Acyliminium Ion Chemistry
作者:Sidi Mohamed Abdallahi、Ewies F. Ewies、Mohamed El‐Shazly、Brahim Ould Elemine、Abderrahmane Hadou、Ján Moncol、Ata Martin Lawson、Adam Daich、Mohamed Othman
DOI:10.1002/chem.202102357
日期:2021.11.5
intermolecular alkynylation reactions of various alkoxy, acetoxylactams, and hydroxylactams. This chemistry broadens the scope of iron catalysis by highlighting new aspects of iron salts σ-Lewis acidity. More importantly, this approach is amenable to an unprecedented tandem intermolecular alkynylation/intramolecular hydration sequence affording expedient access to a new carbonyl structures.
N -Substituted and ring opened saccharin derivatives selectively inhibit transmembrane, tumor-associated carbonic anhydrases IX and XII
作者:Jekaterīna Ivanova、Fabrizio Carta、Daniela Vullo、Janis Leitans、Andris Kazaks、Kaspars Tars、Raivis Žalubovskis、Claudiu T. Supuran
DOI:10.1016/j.bmc.2017.04.007
日期:2017.7
well as some ring opened derivatives were prepared and investigated as inhibitors of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1). The widespread cytosolic isoforms CA I and II were not inhibited by these sulfonamides whereas transmembrane, tumor-associated ones were effectively inhibited, with KIs in the range of 22.1-481nM for CA IX and of 3.9-245nM for hCA XII. Although the inhibition mechanism