Development of Chiral Ureates as Chiral Strong Brønsted Base Catalysts
作者:Azusa Kondoh、Sho Ishikawa、Masahiro Terada
DOI:10.1021/jacs.9b13922
日期:2020.2.26
Recently, chiralBrønsted bases having high basicity have emerged as a powerful tool in developing new catalytic enantioselective reactions. However, such chiral strong Brønsted base catalysts are still very scarce. Herein, we report the development of a chiral anionic Brønsted base having a N,N'-dialkyl ureate moiety as a basic site. Its prominent catalytic activity was demonstrated in the enantioselective
An Inhibitor of Fatty Acid Synthase Thioesterase Domain with Improved Cytotoxicity against Breast Cancer Cells and Stability in Plasma
作者:Leslie E. Lupien、Evan M. Dunkley、Margaret J. Maloy、Ian B. Lehner、Maxwell G. Foisey、Maddison E. Ouellette、Lionel D. Lewis、Darcy Bates Pooler、William B. Kinlaw、Paul W. Baures
DOI:10.1124/jpet.119.258947
日期:2019.10
thioesterase domain FASN inhibitor that has drug-like properties, is more cytotoxic to breastcancer cells than the widely used tetrahydro-4-methylene-2S-octyl-5-oxo-3R-furancarboxylic acid, and has negligible effects on the growth and proliferation of noncancerous mammary epithelial cells. Our studies have confirmed the value of using potent and selective FASN inhibitors in the treatment of BC cells and have
Discovery and structure–activity relationships of novel sulfonamides as potent PTP1B inhibitors
作者:Christopher P. Holmes、Xianfeng Li、Yijun Pan、Caiding Xu、Ashok Bhandari、Claire M. Moody、Joy A. Miguel、Steven W. Ferla、M. Nuria De Francisco、Brian T. Frederick、Siqun Zhou、Natalie Macher、Larry Jang、Jennifer D. Irvine、J. Russell Grove
DOI:10.1016/j.bmcl.2005.06.061
日期:2005.10
A series of novel sulfonamides containing a single difluoromethylene-phosphonate group were discovered to be potent inhibitors of protein tyrosine phosphatase 1B. Structure-activity relationships around the scaffold were investigated, leading to the identification of compounds with IC50 or K-i values in the low nanomolar range. These sulfonamide-based inhibitors exhibit 100 and 30 times higher inhibitory activity than the corresponding tertiary amines and carboxamides, respectively. (c) 2005 Elsevier Ltd. All rights reserved.
Chiral ureas and thioureas supported on polystyrene for enantioselective aza-Henry reactions under solvent-free conditions
作者:Rafael Pedrosa、José M. Andrés、Deisy P. Ávila、Miriam Ceballos、Rodrigo Pindado
DOI:10.1039/c4gc02474e
日期:——
Chiral recoverable supported bifunctional ureas or thioureas promote highly enantioselective aza-Henry reactions under solvent-free conditions.
手性可回收支持的双功能脲或硫脲在无溶剂条件下促进高对映选择性的无溶剂条件下的氮杂-Henry反应。
Amidation of unactivated ester derivatives mediated by trifluoroethanol
作者:Christopher G. McPherson、Nicola Caldwell、Craig Jamieson、Iain Simpson、Allan J. B. Watson
DOI:10.1039/c7ob00593h
日期:——
A catalytic amidation protocol mediated by 2,2,2-trifluoroethanol has been developed, facilitating the condensation of unactivated esters and amines, furnishing both secondary and tertiary amides. The complete scope and limitations of the method are described, along with modified conditions for challenging substrates such as acyclic secondary amines and chiral esters with retention of chiral integrity