Oxidative Kinetic Resolution of Cyclic Benzylic Ethers
作者:Shutao Sun、Yingang Ma、Ziqiang Liu、Lei Liu
DOI:10.1002/anie.202009594
日期:2021.1.4
manganese‐catalyzed oxidative kinetic resolution of cyclic benzylic ethersthrough asymmetric C(sp3)−H oxidation is reported. The practical approach is applicable to a wide range of 1,3‐dihydroisobenzofurans bearing diverse functional groups and substituent patterns at the α position with extremely efficient enantiodiscrimination. The generality of the strategy was further demonstrated by efficient oxidative kinetic
Synthesis, characterization and luminescence properties of homoleptic platinum(<scp>ii</scp>) acetylide complexes
作者:José Benito、Jesús R. Berenguer、Juan Forniés、Belén Gil、Julio Gómez、Elena Lalinde
DOI:10.1039/b308291a
日期:——
A family of homoleptic tetraalkynylplatinate(II) complexes (NBu4)2[Pt(CCR)4] containing various arylsubstituted (R = C6H4X), where X is an electron-donating, -withdrawing or -delocalizing substituent, and ethynylpyridine (C5H4N-2, C5H4N-4) ligands have been prepared. The structures of complexes with R = (4-CF3)C6H4 (4·2HCCl3), (4-CN)C6H4 (6·H2O) and C5H4N-4 (9b·HCCC5H4N-4·2H2O) have been determined
含多个被芳基取代的(R = C 6 H 4 X)的均化四炔基铂(II)配合物(NBu 4)2 [Pt(C CR)4 ] ,其中X是供电子,吸电子或离域取代基,和乙炔基吡啶(C 5 H 4 N-2,C 5 H 4 N-4)配体已经准备好了。R =(4-CF 3)C 6 H 4 (4 ·2HCCl 3),(4-CN)C 6 H 4 (6 ·H 2 O)和C 5 H 4 N-4(9b)的配合物的结构·HC CC 5 H 4 N-4·2H 2 O)通过单晶X射线衍射求出。在4种情况下,通过短的CHmoleculesπ相互作用将两个分子的CHCl 3结合到阴离子中,而对-吡啶基乙炔基衍生物高氧2分子通过适度的N⋯H–O–H⋯N分子间相互作用连接不同的阴离子,从而形成延伸的一维链。已经检查了配合物的光物理和电化学性质。它们都在液态和固态下显示出77和298 K时的发射,寿命在微秒范围内。在某些情况下,
Synthesis, Structural, and Photophysical Studies of Phenylquinoline and Phenylquinolinyl Alkynyl Based Pt(II) Complexes
revealing the presence of intramolecular (H···Pt and H···C≡C) and intermolecular Omethoxy···HHpq contacts in 2 and the formation of butterfly structures in 4 and 5. In the tBu derivative 4, a shorter intramolecular Pt···Pt separation was found [3.0936(3) Å in 4 vs 3.2109(3) Å in 5], which is related to the nature of η2-alkynyl linkages (η2-asymmetrical in 4 vs η2-symmetrical in 5). Anionic 1–3 display bright
Alkynyl bridged cyclometalated Ir<sub>2</sub>M<sub>2</sub> clusters: impact of the heterometal in the photo- and electro-luminescence properties
作者:Julio Fernández-Cestau、Nora Giménez、Elena Lalinde、Patricia Montaño、M. Teresa Moreno、Sergio Sánchez、Michael D. Weber、Rubén D. Costa
DOI:10.1039/c5dt04027b
日期:——
The distinct photo- and electro-luminescence properties of clusters [Ir2M2(ppy)4(μ-CCC6H4-OMe3)4] (M = Ag, Cu) provide an example of the role of the CCR groups in modulating metallophillic bonding in the T1 state.
Small Molecule Agonists of the Orphan Nuclear Receptors Steroidogenic Factor-1 (SF-1, NR5A1) and Liver Receptor Homologue-1 (LRH-1, NR5A2)
作者:Richard J. Whitby、Jozef Stec、Raymond D. Blind、Sally Dixon、Lisa M. Leesnitzer、Lisa A. Orband-Miller、Shawn P. Williams、Timothy M. Willson、Robert Xu、William J. Zuercher、Fang Cai、Holly A. Ingraham
DOI:10.1021/jm1014296
日期:2011.4.14
The crystal structure of LRH-1 ligand binding domain bound to our previously reported agonist 3-(E-oct-4-en-4-y1)-1-phenylamino-2-phenyl-cis-bicyclo[3.3.0]oct-2-ene 5 is described. Two new classes of agonists in which the bridgehead anilino group from our first series was replaced with an alkoxy or 1-ethenyl group were designed, synthesized, and tested for activity in a peptide recruitment assay. Both new classes gave very active compounds, particularly against SF-1. Structure-activity studies led to excellent dual-LRH-1/SF-1 agonists (e.g., RJW100) as well as compounds selective for LRH-1 (RJW101) and SF-1 (RJW102 and RJW103). The series based on 1-ethenyl substitution was acid stable, overcoming a significant drawback of our original bridgehead anilino-substituted series. Initial studies on the regulation of gene expression in human cell lines showed excellent, reproducible activity at endogenous target genes.