Rational Design and Simple Chemistry Yield a Superior, Neuroprotective HDAC6 Inhibitor, Tubastatin A
摘要:
Structure-based drug design combined with homology modeling techniques were used to develop potent inhibitors of HDAC6 that display superior selectivity for the HDAC6 isozyme compared to other inhibitors. These inhibitors can be assembled in a few synthetic steps, and thus are readily scaled up for in vivo studies. An optimized compound from this series, designated Tubastatin A, was tested in primary cortical neuron cultures in which it was found to induce elevated levels of acetylated a-tubulin, but not histone, consistent with its HDAC6 selectivity. Tubastatin A also conferred dose-dependent protection in primary cortical neuron cultures against glutathione depletion-induced oxidative stress. Importantly, when given alone at all concentrations tested, this hydroxamate-containing HDAC6-selective compound displayed no neuronal toxicity, thus, forecasting the potential application of this agent and its analogues to neurodegenerative conditions.
Chemoselective N-Acylation of Indoles and Oxazolidinones with Carbonylazoles
作者:Stephen T. Heller、Erica E. Schultz、Richmond Sarpong
DOI:10.1002/anie.201203976
日期:2012.8.13
Unique reactivity: In the presence of more reactive amine and alcohol functional groups and of carboxylic acids, the chemoselective N‐acylation of indoles (see scheme) and oxazolidinones is achieved by taking advantage of the unique reactivity of carbonylazole acylating agents with catalytic amounts of 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU).
Development of a Catalytic Electron Transfer System Mediated by Transition Metal Ate Complexes: Applicability and Tunability of Electron-Releasing Potential for Organic Transformations
We have developed a catalyticelectrontransfer (ET) system composed of a transition metal ate complex (Me3M(II)Li; M = Co(II), Mn(II), Fe(II)) and magnesium. This system (catalytic Me3M(II)Li/Mg) turned out to be effective for various ET reactions, such as the desulfonylation of N-phenylsulfonyl amides, and others (the chemoselective cleavage of O-allyl groups, the reduction of nitro groups, the partial
我们开发了一种催化电子转移 (ET) 系统,由过渡金属盐络合物 (Me3M(II)Li;M = Co(II)、Mn(II)、Fe(II)) 和镁组成。该系统(催化 Me3M(II)Li/Mg)被证明对各种 ET 反应有效,例如 N-苯基磺酰胺的脱磺酰化,以及其他(O-烯丙基的化学选择性裂解、硝基的还原、二酮的部分还原,以及二苯基碘盐的还原偶联)。该系统的 ET 能力可以通过改变 ate 配合物的配体来调整。实验和电化学证明了这种可调性:烷氧基连接和双阴离子型 ET 复合物分别显示减弱和增强的还原能力。ET 能力的改变通过电化学测量和化学反应进行评估。这些结果为设计各种定制的 ET 复合物提供了基础。
Process for the preparation of N-ethylcarbazole
申请人:Cassella Aktiengesellschaft
公开号:US05393894A1
公开(公告)日:1995-02-28
The present invention relates to a process for the preparation of N-ethylcarbazole by reaction of carbazole or N-ethoxycarbonylcarbazole with diethyl carbonate.
本发明涉及一种通过将咔唑或N-乙氧羰基咔唑与乙二醇碳酸二乙酯反应制备N-乙基咔唑的方法。
One-electron photooxidation of carbazole in the presence of carbon tetrachloride. Part I. Carbon tetrachloride and ethanol used as reaction media
作者:Bogumil Zelent、Gilles Durocher
DOI:10.1139/v82-143
日期:1982.4.15
transfer from carbazole to CCl4 molecule in the excited CT complex, is the primary photochemical reaction followed by an heterolytic dissociation of a C—Cl bond which gives rise to the primary photoproducts in the solvent cage [C+•Cl−ĊCl3]. Secondary photochemical reactions initiate transformation of the radical cation of carbazole in the solvent cage giving rise to the following intermediate species:The
作者:Manas Chakrabarty、Amar C. Nath、Shampa Khasnobis、Manju Chakrabarty、Yaeko Konda、Yoshihiro Harigaya、Kanki Komiyama
DOI:10.1016/s0031-9422(97)00345-2
日期:1997.10
Two new alkaloids, 9-carbethoxy-3-methylcarbazole and 9-formyl-3-methylcarbazole, and a known metabolite, 3-methyl-carbazole were isolated from the roots of Murrayakoenigii. All three compounds were identified by detailed spectral analyses including 2D NMR studies and their structures confirmed by synthesis. Of the two new metabolites, the 9-formyl compound displayed weak cytotoxicity against both