该手稿涉及新型作为多功能神经保护剂的基于苯并嗪酮和吲哚的化合物的设计,合成和生物学评估。这些化合物抑制人类腺苷激酶(ħ AK)和人糖原合酶激酶3β(ħ GSK-3β)的酶。基于分子对接方法的计算分析强调了同时靶向两种蛋白质的变构位点的潜在结构要求。电脑提示暗示了适当修饰的苯并恶嗪酮和吲哚(5a-s和6a-c)的合成,生化分析显示它们作为h的变构抑制剂的行为GSK-3β。对于我们的第4个命中化合物和该系列的最佳化合物(5c,l和6b),通过评估所选化合物对H的保护作用,评估了其在人类神经母细胞瘤细胞系(IMR 32,未分化和神经元分化)中的潜在抗氧化剂谱2 O 2的细胞毒性和活性氧(ROS)的产生。结果表明,即使在较低剂量下,被测化合物也具有强大的功效,可抵消诱导的氧化应激(50μMH 2 O 2)并防止ROS的形成。此外,在分析的浓度范围(0.1至50μM)下,受试化合物没有显示出通过LD
Asymmetric Synthesis and Absolute Configuration Assignment of a New Type of Bedaquiline Analogue
作者:Chang-Jiang Qiao、Xiao-Kui Wang、Fei Xie、Wu Zhong、Song Li
DOI:10.3390/molecules201219846
日期:——
Bedaquiline is the first FDA-approved new chemical entity to fight multidrug-resistant tuberculosis in the last forty years. Our group replaced the quinoline ring with a naphthalene ring, leading to a new type of triarylbutanol skeleton. An asymmetric synthetic route was established for our bedaquiline analogues, and the goal of assigning their absolute configurations was achieved by comparison of experimental and calculated electronic circular dichroism spectra, and was confirmed by the combined use of circular dichroism and NMR spectroscopy.
Catalytic alkylation of arylGrignard reagents by iron(<scp>iii</scp>) amine-bis(phenolate) complexes
作者:Xin Qian、Louise N. Dawe、Christopher M. Kozak
DOI:10.1039/c0dt01239d
日期:——
[FeL2(μ-Cl)]2 (2) and [FeL3(μ-Cl)]2 (3). In the solid state, these complexes exist as chloride-bridged dimers giving distorted trigonal bipyramidal iron(III) ions. Reaction of H2L1 with FeBr3, however, results in the formation of a tetrahedral iron(III) complex possessing two bromide ligands. The amine-bis(phenolate) ligand is bidentate in this complex and bonds to the iron(III) ion via the phenolate O-donors
Enantioselective [4 + 1]-Annulation of α,β-Unsaturated Imines with Allylic Carbonates Catalyzed by a Hybrid <i>P</i>-Chiral Phosphine Oxide–Phosphine
作者:Hanyuan Li、Jiesi Luo、Bojuan Li、Xizhen Yi、Zhengjie He
DOI:10.1021/acs.orglett.7b02800
日期:2017.10.20
A highly enantio- and diastereoselective [4 + 1]-annulation reaction between α,β-unsaturated imines and allylic carbonates has been realized under the catalysis of a novel hybrid P-chiral phosphine oxide–phosphine, providing enantioenriched polysubstituted 2-pyrrolines in good to excellent yields and up to 99% ee. Based on Han’s methods, the catalyst featuring a sole P(O)-chirality in the molecule
Iron catalyzed oxidative assembly of N-heteroaryl and aryl metal reagents using oxygen as an oxidant
作者:Kun Ming Liu、Lian Yan Liao、Xin Fang Duan
DOI:10.1039/c4cc08494b
日期:——
An equivalent amount of N-heteroaryl and aryl Grignard or lithium reagents, after mediation by an equivalent of titanate, was facilely coupled to furnish N-heteroaryl-aryl compounds under the catalysis of FeCl3/TMEDA at ambient temperature usingoxygen as an oxidant. Most of the common N-heteroaryls were all good candidates, and thus provided a general, green and pratical protocol for the flexible
Nickel(0)-Catalyzed Cross-Coupling of Alkyl Arenesulfonates with Aryl Grignard Reagents
作者:Chul-Hee Cho、Hee-Sung Yun、Kwangyong Park
DOI:10.1021/jo026449n
日期:2003.4.1
nickel-catalyzed cross-coupling reactions of neopentyl arenesulfonates with arylmagnesium bromides, involving nucleophilic aromatic substitution of alkyloxysulfonyl groups by aryl nucleophiles, take place in high yields. Optimal efficiencies are obtained by adding 3 + 2 equiv of the Grignardreagent to a mixture of dppfNiCl(2) and the sulfonate in refluxing THF. Neopentyl arenesulfonates are useful sources of