作者:B.Wesley Trotter、Amy G. Quigley、William C. Lumma、John T. Sisko、Eileen S. Walsh、Christian S. Hamann、Ronald G. Robinson、Hema Bhimnathwala、D.Garrett Kolodin、Wei Zheng、Carolyn A. Buser、Hans E. Huber、Robert B. Lobell、Nancy E. Kohl、Theresa M. Williams、Samuel L. Graham、Christopher J. Dinsmore
DOI:10.1016/s0960-894x(01)00061-0
日期:2001.4
A series of 2-arylindole-3-acetamide farnesylproteintransferaseinhibitors has been identified. The compounds inhibit the enzyme in a farnesyl pyrophosphate-competitive manner and are selective for farnesylproteintransferase over the related enzyme geranylgeranyltransferase-I. A representative member of this series of inhibitors demonstrates equal effectiveness against HDJ-2 and K-Ras farnesylation
Stereoselective Suzuki−Miyaura Cross-Coupling Reactions of Potassium Alkenyltrifluoroborates with Alkenyl Bromides
作者:Gary A. Molander、Luciana A. Felix
DOI:10.1021/jo050286w
日期:2005.5.1
The stereoselective synthesis of conjugated dienes using air-stable potassium alkenyltrifluoroborates as coupling partners is described. The palladium-catalyzed cross-coupling reaction of potassium (E)- and (Z)-alkenyltrifluoroborates with either (E)- or (Z)-alkenyl bromides proceeds readily with moderate to excellent yields to give the corresponding (E,E)-, (E,Z)-, (Z,E)-, or (Z,Z)-conjugated dienes
描述了使用空气稳定的链烯基三氟硼酸钾作为偶联伴侣的立体选择性合成共轭二烯的方法。钯催化的(E)-和(Z)-烯基三氟硼酸钾与(E)-或(Z)-烯基溴化物的钯催化交叉偶联反应容易进行,产率中等至优异,得到相应的(E,E)- ,(E,Z)-,(Z,E)-或(Z,Z)共轭二烯立体定向。交叉耦合通常可使用5摩尔%的Pd(OAC)的实现2,10摩尔%的PPH 3和Cs的3当量2 CO 3在THF-H 2 O(10∶1)中。两种偶联伙伴均容许多种官能团。
Synthesis of 2-Indolyl <i>C</i>-Glycoside Neopetrosins A and C and Congeners via Ni-Catalyzed Photoreductive Cross-Coupling
The synthesis of neopetrosins A and C, two 2-indolyl C-α-d-mannopyranosides, and their congeners has been realized via a direct Ni/photoredox-catalyzed reductive coupling of 3-methoxycarbonyl-2-iodo-1H-indoles with pyranosyl bromides.
Synthesis of Annulated <i>γ</i>-Carbolines and Heteropolycycles by the Palladium-Catalyzed Intramolecular Annulation of Alkynes
作者:Haiming Zhang、Richard C. Larock
DOI:10.1021/jo0343228
日期:2003.6.1
A variety of N-substituted 2-bromo-1H-indole-3-carboxaldehydes incorporating an alkyne-containing tether on the indole nitrogen have been converted to the corresponding tert-butylimines, which have been subjected to palladium-catalyzed intramolecular iminoannulation, affording various gamma-carboline derivatives with an additional ring fused across the 4- and 5-positions in good to excellent yields. When the tethered carbon-carbon triple bond is terminal or substituted with a triethylsilyl group, the iminoannulation generates a tert-butyl-gamma-carbolinium salt as the major product. The palladium-catalyzed intramolecular annulations of N-substituted 2-bromo-1H-indole-3-carboxaldehyde, methyl 2-iodo-1H-indole-3-carboxylate, and 2-iodo-3-phenyl-1H-indole containing a phenylpentynyl tether produce the corresponding heteropolycycles in moderate to good yields.
Optimization of the in Vitro Cardiac Safety of Hydroxamate-Based Histone Deacetylase Inhibitors
Histone deacetylase (HDAC) inhibitors have shown promise in treating various forms of cancer. However, many HDAC inhibitors from diverse structural classes have been associated with QT prolongation in humans. Inhibition of the human ether a-go-go related gene (hERG) channel has been associated with QT prolongation and fatal arrhythmias. To determine if the observed cardiac effects of HDAC inhibitors in humans is due to hERG blockade, a highly potent HDAC inhibitor devoid of hERG activity was required. Starting with dacinostat (LAQ824), a highly potent. HDAC inhibitor, we explored the SAR to determine the pharmacophores required for HDAC and hERG inhibition. We disclose here the results of these efforts where a high degree, of pharmacophore homology between these two targets was discovered. This, similarity prevented traditional strategies for mitigating hERG binding/modulation from being successful and novel approaches for reducing hERG inhibition were required. Using a hERG homology model, two compounds, 11r and 25i, were discovered to be highly efficacious with weak affinity for the hERG and other ion channels.