A palladium catalyzed atom-efficient cross-coupling reactivity of triarylbismuths with α,β-unsaturated acyl chlorides
作者:Maddali L.N. Rao、Varadhachari Venkatesh、Deepak N. Jadhav
DOI:10.1016/j.jorganchem.2008.05.012
日期:2008.7
An atom-efficientcross-coupling reactivity of triarylbismuths (1 equiv) was demonstrated by cross-couplingreaction with 3 equiv of α,β-unsaturated acylchlorides under palladium catalysis in the synthesis of a series of functionalized α, β-unsaturated ketones in high isolated yields.
Design and synthesis of novel 1,3,5-triphenyl pyrazolines as potential anti-inflammatory agents through allosteric inhibition of protein kinase Czeta (PKCζ)
作者:Mohammad Abdel-Halim、Ashraf H. Abadi、Matthias Engel
DOI:10.1039/c8md00100f
日期:——
Much light has been shed on the vital role of protein kinase Czeta (PKCζ) in NF-κB activation and the potential use of PKCζ inhibitors as anti-inflammatory agents. We previously reported a series of 1,3,5-trisubstituted pyrazolines as potent and selective allosteric inhibitors of PKCζ; in that series of compounds, the phenolic OH at the 5-phenyl was essential for binding to the PKCζ PIF pocket. In
人们对蛋白激酶 Czeta (PKC z) 在 NF-κB 激活中的重要作用以及 PKC z 抑制剂作为抗炎剂的潜在用途有了更多的了解。我们之前报道了一系列 1,3,5-三取代吡唑啉作为 PKCδ 的有效和选择性变构抑制剂;在该系列化合物中,5-苯基处的酚 OH 对于与 PKC z PIF 口袋的结合至关重要。在本研究中,我们令人惊讶地发现,用卤素取代它并同时将 OH 移至 3-苯基仍然会产生活性化合物。本文提出了此类化合物的扩展,具有新的重点库,其中 5-苯基处的酚羟基(据报道是活性的不可替代特征)被移至 3-苯基并被卤素取代。这组新化合物保持了相同水平的针对 PKCζ 的效力和针对 PKC 同工型的选择性,但针对 PIF 口袋突变体 PKCζ[Val297Leu] 的效力降低。值得注意的是,关键功能组的重新定位导致细胞效力显着增强。最有效的新型 PKC z 抑制剂之一2h能够抑制 RAW
Alkene Synthesis by Photo‐Wolff‐Kischner Reaction of Sulfur Ylides and
<i>N</i>
‐Tosylhydrazones
A visible-light-driven and room temperature photo-Wolff-Kischner reaction of sulfur ylides and N-tosylhydrazones has been developed for the first time to provide modular access to alkene synthesis. The high functional group tolerance and broad substrate scope were demonstrated by more than 60 examples. Both E- and Z-olefinic stereochemistry in the products could be controlled with excellent stereoselectivity
Trisubstituted and tetrasubstituted pyrazolines as a novel class of cell-growth inhibitors in tumor cells with wild type p53
作者:Mohammad Abdel-Halim、Adam B. Keeton、Evrim Gurpinar、Bernard D. Gary、Simon M. Vogel、Matthias Engel、Gary A. Piazza、Frank M. Boeckler、Rolf W. Hartmann、Ashraf H. Abadi
DOI:10.1016/j.bmc.2013.09.055
日期:2013.12
Derivatives with scaffolds of 1,3,5-tri-substituted pyrazoline and 1,3,4,5-tetra-substituted pyrazoline were synthesized and tested for their inhibitory effects versus the p53(+/+) HCT116 and p53 (/) H1299 human tumor cell lines. Several compounds were active against the two cell lines displaying IC50 values in the low micromolar range with a clearly more pronounced effect on the p53(+/+) HCT116 cells. The compound class shows excellent developability due to the modular synthesis, allowing independent optimization of all three to four key substituents to improve the properties of the molecules. (C) 2013 Elsevier Ltd. All rights reserved.
Popat; Kachhadia; Nimavat, Kiran S., Journal of the Indian Chemical Society, 2004, vol. 81, # 2, p. 157 - 159