The present invention provides compounds, compositions and methods for the selective inhibition of cathepsin S. In a preferred aspect, cathepsin S is selectively inhibited in the presence of at least one other cathepsin isozyme (e.g., cathespin K). The present invention also provides methods for treating a disease state in a subject by selectively inhibiting cathepsin S.
作者:Annette D. Allen、John Andraos、Thomas T. Tidwell、Sinisa Vukovic
DOI:10.1021/jo402438w
日期:2014.1.17
zwitterions, and these undergo amine catalyzed dealkylation forming N,N-disubstituted amides. Reactions of N-methyldialkylamines show a strong preference for methyl group loss by displacement, as predicted by computational studies. Loss of ethyl groups in reactions with triethylamine also occur by displacement, but preferential loss of isopropyl groups in the phenylketene reaction with diisopropylethylamine
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-catalyzed tandem protonation/deuteration and reduction of <i>in situ</i>-formed enamines
作者:Rongpei Wu、Ke Gao
DOI:10.1039/d1ob00316j
日期:——
protonation/deuteration and reduction of in situ-formed enamines in the presence of water and pinacolborane was developed. Regioselective β-deuteration of tertiary amines was achieved with high chemo- and regioselectivity. D2O was used as a readily available and cheap source of deuterium. Mechanisticstudies indicated that B(C6F5)3 could activate water to promote the protonation and reduction of enamines.
开发了一种高效的B(C 6 F 5)3催化串联质子化/氘代和在水和频哪醇硼烷存在下还原原位形成的烯胺的方法。叔胺的区域选择性β-氘化具有高的化学和区域选择性。D 2 O被用作一种容易获得且廉价的氘源。机理研究表明,B(C 6 F 5)3可以活化水以促进烯胺的质子化和还原。
Iron-Catalyzed Synthesis of Sulfur-Containing Heterocycles
An iron-catalyzed synthesis of sulfur- and sulfone-containing heterocycles is reported. The method is based on the cyclization of readily available substrates and proceeded with high efficiency and diastereoselectivity. A variety of sulfur-containing heterocycles bearing moieties suitable for subsequent functionalization are prepared. Illustrative examples of such postcyclization modifications are
Trapping Intermediates in an [8 + 2] Cycloaddition Reaction with the Help of DFT Calculations
作者:Marta L. Lage、Israel Fernández、Miguel A. Sierra、M. Rosario Torres
DOI:10.1021/ol200910z
日期:2011.6.3
DFT calculations predict that the [8 + 2] cycloadditionreaction between ketenes and 8-azaheptafulvenes occurs stepwise through antiaromatic zwitterionic intermediates. With adequate modifications of both the electronic properties of the ketene and the reaction conditions, these elusive intermediates have been successfully trapped and fully characterized (X-ray), thus confirming the predicted stepwise