涉及一系列四齿覆盖的μ-hydroxidodimanganese(III)系统的氧化酶活性配位体ħ 2大号- [R 1,R 2有一对酚臂已经在3,5-二-存在下进行了研究叔-butylcatechol(H 2 DBC)作为大肠菌素兼还原剂。该反应遵循两个明显不同的途径,这取决于封端配体中存在的取代基组合(R 1和R 2)。通过配体H 2 L t -Bu,t -Bu和H 2 L t -Bu,OMe,得到的产物为半喹诺酮化合物[MnIII(L吨-Bu,吨-Bu)(DBSQ)]·2CH 3 OH(1)和[锰III(L吨-Bu,OME)(DBSQ)]·CH 3 OH(2)表示。在此过程中,分子氧被两个电子还原,从而在溶液中生成H 2 O 2,这已通过碘量法检测得到了证实。对于其余的配体,即H 2 L Me,Me,H 2 L t- Bu,Me,H 2 L Me,t -Bu和H 2 L Cl,Cl,最
[EN] IRON BISPHENOLATE COMPLEXES AND METHODS OF USE AND SYNTHESIS THEREOF<br/>[FR] COMPLEXES BISPHÉNOLATES DE FER ET LEURS PROCÉDÉS D'UTILISATION ET DE SYNTHÈSE
申请人:UNIV PRINCE EDWARD ISLAND
公开号:WO2013053046A1
公开(公告)日:2013-04-18
The present application, relates to iron bisphenolate complexes and methods of use and synthesis thereof. The iron complexes are prepared from tridentate or tetradentate ligands of Formula I: wherein R1 and R2 are as defined herein. Also provided are methods and processes of using the iron bisphenolate complexes as catalysts in cross-coupling reactions and in controlled radical polymerizations.
Exploring the reactivity of manganese(<scp>iii</scp>) complexes with diphenolate-diamino ligands in rac-lactide polymerization
作者:Pargol Daneshmand、Frank Schaper
DOI:10.1039/c5dt03756e
日期:——
distortions. Magnetic moments determined in MeOD were indicative of high-spin Mn(III)-d4 complexes (μeff = 4.2–4.6μB). Methoxide complexes were active in the coordination–insertion polymerization of rac-lactide (130 °C, 0.33–1.0 mol% catalyst loading) to yield atactic polylactic acid with moderate molecular weight control. Polymerization activity was reduced, but not suppressed by the presence of protic impurities
Structure and C–C cross-coupling reactivity of iron(III) complexes of halogenated amine-bis(phenolate) ligands
作者:Amy M. Reckling、Dana Martin、Louise N. Dawe、Andreas Decken、Christopher M. Kozak
DOI:10.1016/j.jorganchem.2010.09.076
日期:2011.2
structure of the proligand H2[L1] shows intramolecular hydrogen bonding. In the solid-state structure, the iron complex exhibits intermolecular hydrogen bonding between the water ligand and the phenolate oxygen of a neighbouring complex. The anhydrous complexes were studied for catalytic activity towards C–C cross-coupling of Grignardreagent nucleophiles with alkyl halide electrophiles.
描述了具有二氯和二氟取代酚基的四齿胺-双(酚)配体的制备及其与FeX 3(X = Cl或Br)的反应。化合物2-吡啶基氨基-N,N-双(2-亚甲基-4,6-二氯苯酚),H 2 [ L 1 ];2-吡啶基氨基-N,N-双(2-亚甲基-4,6-二氟苯酚),H 2 [ L 2 ];二甲基氨基乙基氨基-N,N-双(2-亚甲基-4,6-二氯苯酚),H 2 [ L 3 ];2- tetrahydrofurfuryl- Ñ,Ñ-双(2-亚甲基-4,6-二氯苯酚),H 2 [ L 4 ];在水性介质中制备甲氧基乙基氨基-N,N-双(2-亚甲基-4,6-二氯苯酚),H 2 [ L 5 ],并以良好的产率获得白色粉末。报道了由这些四齿配体支撑的十个新的卤化铁(III)配合物。获得了具有代表性的H 2 [ L 1 ]的单晶X射线衍射结构,以及铁(III)配合物水合2-吡啶基氨基-N,N-双(2-亚甲基-4,6
Diverse Structure−Activity Trends in Amine Bis(phenolate) Titanium Polymerization Catalysts
作者:Stanislav Groysman、Edit Y. Tshuva、Israel Goldberg、Moshe Kol、Zeev Goldschmidt、Michael Shuster
DOI:10.1021/om049630q
日期:2004.10.1
The difference in polymerization activity trends between the two series may be traced back to their different tendency toward misinsertions. A “NMe2”-Ti complex having Cl groups in the ortho, para positions of the phenolate rings led to the most activecatalyst and to a remarkably high-Mw polymer (>4 000 000) obtained within 1 h of polymerization at RT. The characterization of this ultrahigh-Mw atactic
Amine‐bis(phenolato)cobalt(II) Catalysts for the Formation of Organic Carbonates from Carbon Dioxide and Epoxides
作者:Marina Reiter、Peter T. Altenbuchner、Stefan Kissling、Eberhardt Herdtweck、Bernhard Rieger
DOI:10.1002/ejic.201403087
日期:2015.4
[(ONNO)RCoII] (R = CMe2Ph; Cl; Br) complexes have been synthesized and fully characterized including X-ray crystallographic analysis. These CoII complexes show good activity for the formation of cyclic propylene carbonate in combination with tetrabutylammonium bromide (TBAB) as a co-catalyst. The reaction parameters such as carbon dioxide pressure, co-catalyst loadings and temperature were varied to
新的单金属胺-双(苯酚)钴 (II) [(ONNO)RCoII] (R = CMe2Ph; Cl; Br) 配合物已被合成并充分表征,包括 X 射线晶体学分析。这些 CoII 配合物与作为助催化剂的四丁基溴化铵 (TBAB) 结合形成环状碳酸亚丙酯显示出良好的活性。改变二氧化碳压力、助催化剂负载量和温度等反应参数以确定理想的反应条件。这些催化剂也用于环己烯氧化物/CO 2 和环氧丙烷/CO 2 的共聚反应。发现 [(ONNO)ClCoII]*(MeOH) 可以有效地共聚氧化环己烯 (CHO) 和 CO2。这是第一个报道的在 CO2 和 CHO 共聚中具有活性的胺-双(苯酚)钴(II)配合物。进行了深入的稳定性研究(Evan 方法)以验证 CoII 作为共聚所需的活性物质。通过 NMR、ESI-MS 和 MALDI-TOF 进行的端基分析揭示了 4-(二甲氨基)吡啶 (DMAP) 和甲氧基封端链的存在。