Dinuclear Ru-Aqua Complexes for Selective Epoxidation Catalysis Based on Supramolecular Substrate Orientation Effects
作者:Carlo Di Giovanni、Albert Poater、Jordi Benet-Buchholz、Luigi Cavallo、Miquel Solà、Antoni Llobet
DOI:10.1002/chem.201304699
日期:2014.4.1
Ru–aqua complex [RuII(trpy)(H2O)]2(μ‐pyr‐dc)}+ is a powerful epoxidation catalyst for a wide range of linear and cyclic alkenes. High turnover numbers (TNs), up to 17000, and turnover frequencies (TOF), up to 24120 h−1 (6.7 s−1), have been obtained using PhIO as oxidant. This species presents an outstanding stereospecificity for both cis and trans olefins towards the formation of their corresponding
Ru-aqua络合物[Ru II(trpy)(H 2 O)] 2(μ-pyr-dc)} +是一种功能强大的环氧化催化剂,适用于各种线性和环状烯烃。使用PhIO作为氧化剂,可获得高达17000的高周转率(TNs)和高达24120 h -1(6.7 s -1)的周转频率(TOF)。这种物质对顺式和反式烯烃均具有出色的立体定向性,以形成其相应的顺式和反式环氧化物。此外,它显示出与顺式和反式不同的反应性烯烃由于其配体支架传递的底物取向超分子效应。使用电化学技术和DFT计算可以合理地实现这种效果以及令人印象深刻的反应速率。
A magnesium-based multifunctional metal–organic framework: synthesis, thermally induced structural variation, selective gas adsorption, photoluminescence and heterogeneous catalytic study
layered alkaline earth metal–organicframework (MOF) compound, [Mg2(HL)2(H2O)4]·H2O}n (1) (H3L = pyrazole-3,5-dicarboxylate). Compound 1 selectively adsorbs hydrogen (H2) (ca. 0.56 wt% at 77 K) over nitrogen at 1 atm and demonstrates a strong blue fluorescent emission band at 480 nm (λmax) upon excitation at 270 nm. Notably, the 2D framework compound efficiently catalyzes the aldol condensation reactions
通过依赖温度的合成制备了三种基于镁的羧酸盐骨架体系。通过水热法合成化合物,并通过单晶X射线衍射分析表征。介质温度的逐步升高导致网络尺寸的逐步升高,最终导致形成新的二维二维层状碱土金属-有机骨架(MOF)化合物[Mg 2(HL)2( H 2 O)4 ]·H 2 O} n(1)(H 3 L =吡唑-3,5-二羧酸酯)。化合物1选择性吸附氢(H 2)(ca。在1个大气压77 K)在氮0.56%(重量)和在480nm处(演示了强的蓝色荧光发射带λ最大在270nm处)激发时。值得注意的是,在环境友好的条件下,二维骨架化合物可有效催化异质介质中各种芳香醛与酮的醛醇缩合反应。催化剂可以循环使用几次,而活性没有任何重大损失。
Barium Carboxylate Metal–Organic Framework – Synthesis, X‐ray Crystal Structure, Photoluminescence and Catalytic Study
A new 3D alkaline earth metal–organicframework (MOF), [Ba(Hdcp)H2O]n (1) (H3dcp = 3,5-pyrazoledicarboxylic acid), has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction analysis. A crystallographic study reveals that each metal ion in 1 is coordinated by eight O atoms and one N atom. Each 3,5-pyrazoledicarboxylato (Hdcp2–) ligand coordinates to six alkaline
一种新的 3D 碱土金属有机骨架 (MOF),[Ba(Hdcp)H2O]n (1) (H3dcp = 3,5-吡唑二甲酸),已被水热合成并通过单晶 X 射线衍射进行结构表征分析。晶体学研究表明,1 中的每个金属离子都由八个 O 原子和一个 N 原子配位。每个 3,5-吡唑二羧酸根 (Hdcp2-) 配体通过两个羧酸根基团与六个碱土金属中心配位,每个羧酸根基团均采用 μ3-η2:η1-桥接配位模式以提供 3D 网络。热重分析表明,1 的热稳定性高达约。230℃。在约发射带。在室温下固态的1的光致发光光谱中观察到466nm(λmax)。
Divalent transition metal complexes of 3,5-pyrazoledicarboxylate
作者:T. Premkumar、S. Govindarajan
DOI:10.1007/s10973-005-6932-0
日期:2006.5
spectroscopic data suggest that Co and Ni complexes adopt an octahedral geometry. The IR spectra confirm the presence of unidentate carboxylate anion (Δν=νasy(COO–)–νsym(COO–)>215 cm–1) in all the complexes and bidentate bridging hydrazine (νN–N=985–950 cm–1) in the metal hydrazine complexes. Both metal carboxylate and metal hydrazine carboxylate complexes undergo endothermic dehydration and/or dehydrazination
经验式为Mpz(COO)2(H 2 O)2的新的二价过渡金属3,5-吡唑二羧酸盐水合物,其中 M = Mn,Co,Ni,Cu,Zn和Cd(pz(COO)2 = 3,5-吡唑二羧酸盐),Mpz(COO)2 N 2 H 4类型的金属肼配合物,其中 M = Co,Zn或Cd和Mpz(COO)2 n N 2 H 4 ·H 2 O,其中 m = Ni时 n = 1 和 ñ = 0.5 中号 已经通过理化方法制备了= Cu。电子光谱数据表明,钴和镍配合物采用八面体几何形状。IR光谱确认单齿羧酸根阴离子的存在(Δν=ν ASY(COO -)-ν符号(COO -)>215厘米-1)在所有的配合物和二齿桥接肼(ν N-N = 985-950厘米–1)中的金属肼配合物。羧酸金属盐和羧酸金属肼盐配合物都经历吸热脱水和/或脱水作用,然后有机部分放热分解,得到相应的金属氧化物作为最终产物,但吡唑二羧酸锰水合物除外,
Vitronectin receptor antagonists, their preparation and their use
申请人:Genentech, Inc. and Hoechst Aktiengesellschaft
公开号:US20030027807A1
公开(公告)日:2003-02-06
The present invention relates to compounds of the formula I
A—B—D—E—F—G (I)
in which A, B, D, E, F and G have the meanings given in the patent claims, to their preparation and to their use as medicaments. The compounds of the invention are used as vitronectin receptor antagonists and as inhibitors of bone resorption.