Development of cell-active non-peptidyl inhibitors of cysteine cathepsins
作者:Dibyendu Dana、Anibal R. Davalos、Shatarupa De、Pratikkumar Rathod、Ranjith K. Gamage、Juliana Huestis、Nisar Afzal、Yuriy Zavlanov、Suneeta S. Paroly、Susan A. Rotenberg、Gopal Subramaniam、Kevin J. Mark、Emmanuel J. Chang、Sanjai Kumar
DOI:10.1016/j.bmc.2013.03.062
日期:2013.6
Cysteine cathepsins are an important class of enzymes that coordinate a variety of important cellular processes, and are implicated in various types of human diseases. However, small molecule inhibitors that are cell-permeable and non-peptidyl in nature are scarcely available. Herein the synthesis and development of sulfonyloxiranes as covalent inhibitors of cysteine cathepsins are reported. From a library of compounds, compound 5 is identified as a selective inhibitor of cysteine cathepsins. Live cell imaging and immunocytochemistry of metastatic human breast carcinoma MDA-MB-231 cells document the efficacy of compound 5 in inhibiting cysteine cathepsin activity in living cells. A cell-motility assay demonstrates that compound 5 is effective in mitigating the cell-migratory potential of highly metastatic breast carcinoma MDA-MB-231 cells. (C) 2013 Elsevier Ltd. All rights reserved.
House-Meinwald rearrangement of aryl-substituted epoxysulfones in hexafluoroisopropanol (HFIP)
作者:Alexandria Uritis、Hannah Phillips、Hunter Phillips、Thomas C. Coombs
DOI:10.1016/j.tetlet.2023.154716
日期:2023.9
β-Aryl-substituted α,β-epoxysulfones undergo House-Meinwald rearrangement to form α-aryl, α-sulfonyl aldehydes in high yields upon dissolution in hexafluoroisopropanol (HFIP), and in some cases, heating. These compounds are typically isolated as the corresponding alcohols following reduction with NaBH4. The β-aryl group is generally required for rearrangement and a variety of substitution patterns