New Type of Metalloproteinase Inhibitor: Design and Synthesis of New Phosphonamide-Based Hydroxamic Acids
摘要:
A series of phosphonamide-based hydroxamate derivatives were synthesized, and the inhibitory activities were evaluated against various metalloproteinases in order to clarify its selectivity profile. Among the four diastereomeric isomers resulting from the chirality at the C-3 and P atoms, the compound with a (R,R)-configuration both at the C-3 position and the phosphorus atom was found to be potently active, while the other diastereomeric isomers were almost inactive. A number of (R,R)-compounds synthesized here exhibited broad spectrum activities with nanomolar K-i values against MMP-1, -3, -9, and TACE and also showed nanomolar IC50 values against HB-EGF shedding in a cell-based inhibition assay. The modeling study using X-ray structure of MMP-3 suggested the possible binding mode of the phosphonamide-based inhibitors.
Metallic catalysts for chemo-, regio-and stereoselective reactions, and corresponding precursors
申请人:Sannicolo Francesco
公开号:US20050107248A1
公开(公告)日:2005-05-19
Metallic catalysts of the general formula (I) and their precursors, suitable for chemo- regio- and stereoselective reactions, derived from ortho-bis-(1-phospholanyl)-heteroarenes. The new catalysts are characterized by the presence of two homomorphic phospholanic rings set in adjacent positions of an aromatic pentatomic heterocycle.
Reactivity of Elemental Tin and Zinc toward Organophosphonic Acid Dialkyl Esters: A New One-Pot Recipe for the Synthesis of Coordination Assemblies Derived from <i>O</i>-Alkylorganophosphonate Ligands
conditions (130 °C, 18–20 h). The key steps in the proposed catalytic cycle involve the monodealkylation of phosphonatediester and in situ generation of a R1SnI or R12SnI2 intermediate via the oxidative addition of alkyl iodide on tin. Evidence in support of the formation of organotin species comes from the isolation of Me2SnO(P)(O)(OiPr)Me}2 (6) from the direct reaction of tin metal with MeP(O)(OiPr)2 in
合成二有机锡双(O-烷基有机膦酸酯)s的新配方,R 1 2 Sn O(P)(O)(OR 1)R} 2 [R = R 1 =甲基(1); R 1 =乙基且R =甲基(2),烯丙基(3),2-噻吩基(4),苄基(5)]是由元素锡(粉末)与有机膦酸二烷基酯RP直接反应制得的(O)(或1)2,在环境条件(130°C,18–20 h)下存在催化量的碘化钾。所提出的催化循环中的关键步骤包括膦酸酯二酯的单脱烷基化和通过在锡上氧化烷基碘而原位产生R 1 SnI或R 1 2 SnI 2中间体。支持金属锡物种形成的证据来自于锡金属与MeP(O)(O)的直接反应中分离的Me 2 Sn O(P)(O)(O i Pr)Me} 2(6)i Pr)2在甲基碘的存在下。该方法也已扩展为分离Zn OP(O)(OMe)Me} 2(7)使用金属锌作为前体。所有化合物的特点是IR和NMR研究,以及X-射线晶体为2,4,6,和7。
Benzimidazole inhibitors of fructose 1,6-bisphosphatase
申请人:Sankyo Company Ltd.
公开号:US06110903A1
公开(公告)日:2000-08-29
Novel benzimidazole compounds of the following structure and their use as fructose-1,6-bisphosphatase inhibitors is described ##STR1##
描述了具有以下结构的新型苯并咪唑化合物及其作为果糖-1,6-二磷酸酶抑制剂的用途。##STR1##
Catalyst-free phosphorylation of aryl halides with trialkyl phosphites through electrochemical reduction
作者:Shuai Wang、Cheng Yang、Shuo Sun、Jianbo Wang
DOI:10.1039/c9cc07069a
日期:——
A catalyst-free electrochemical cross-coupling reaction of aryl halides with trialkyl phosphite has been developed. This reaction proceeds in an undivided cell with a low-cost Ni anode and a graphite cathode under mild and neutral conditions. A wide range of functional groups are well-tolerated and the phosphorylated product can be obtained on the gram scale, showing that this transformation has the
Variable-Gap Conjugated Oligomers Grafted to CdSe Nanocrystals
作者:Romain Stalder、Dongping Xie、Renjia Zhou、Jiangeng Xue、John R. Reynolds、Kirk S. Schanze
DOI:10.1021/cm301351j
日期:2012.8.28
energy offsets between the HOMO and LUMO energies of the organic molecules and the energy bands of the CdSe nanocrystals are well-suited for chargetransferbetween the organic and inorganic components. The characteristics of each component’s excited state are studied by fluorescence spectroscopy and the interactionbetween the conjugated molecules and the CdSe nanocrystals in dilute solutions is monitored