Thorium complexes possessing expanded ring N-heterocyclic iminato ligands: synthesis and applications
作者:Tapas Ghatak、Shani Drucker、Natalia Fridman、Moris S. Eisen
DOI:10.1039/c7dt02126g
日期:——
Six and seven membered N-heterocyclic iminato ligands (L) are introduced allowing access a new class of Th(IV) complexes of the type Cp*2Th(L)(CH3). These complexes were studied in the Tishchenko reaction. Stoichiometric reactions together with kinetic and thermodynamic studies permit us to propose a plausible mechanism.
Synthesis, characterization and catalytic performances of benzimidazolin-2-iminato actinide (IV) complexes in the Tishchenko reactions for symmetrical and unsymmetrical esters
作者:Heng Liu、Maxim Khononov、Natalia Fridman、Matthias Tamm、Moris S. Eisen
DOI:10.1016/j.jorganchem.2017.09.020
日期:2018.2
benzimdazolin-2-iminato actinide−(IV) complexes [(Bim7-MeDipp/MeN)An(N(SiMe3)2)3] (An = U (3), Th (4)) and [(Bim4-MeDipp/MeN)An(N(SiMe3)2)3] (An = U (5), Th (6)) were synthesized and their solid state structures were established by single-crystal X-ray diffraction analysis. The catalytic performances of complexes 3–6 towards the homo- and cross-coupling of aldehydes (Tishchenko reaction) were studied and the thorium
Sodium organoaluminate containing bidentate pyrrolyl ligand: Synthesis, structure, and catalytic activity for the Tishchenko reaction
作者:Yu Liu、Zhiqiang Guo、Yakong Wang
DOI:10.1016/j.jorganchem.2021.121882
日期:2021.7
An novel sodium organoaluminate containing bidentate pyrrolyl ligand [C4H3NH(2-CH2NHtBu)] was efficiently synthesized and characterized by X-raycrystallography. The molecular structure shows it is a monodimensional infinite chain structures with linear arrangements. Its basic repeat unit comprises the Al atom bonded to two deprotonated pyrrole rings and Na atom coordinated to of nitrogen atoms of
高效合成了一种新型的含有双齿吡咯基配体[C 4 H 3 NH(2-CH 2 NH t Bu)]的有机铝酸钠,并通过X射线晶体学对其进行了表征。分子结构表明它是具有线性排列的一维无限链结构。它的基本重复单元包含的铝原子键合至两个去质子化的吡咯环和Na原子配位到-N的氮原子的吨卜片段,其经历进一步的ƞ坐标的相邻分子的吡咯环2 -fasion。此外,该有机铝酸钠对Tishchenko反应表现出高催化活性。
Bulky guanidinate stabilized homoleptic magnesium, calcium and zinc complexes and their catalytic activity in the Tishchenko reaction
(3–5) complexes were occurred. Second, the reaction of two equivalents of potassium salt of LH with metal dihalides via saltmetathesis led to the formation of homoleptic complexes. Third, the reaction between MR2 (M = Mg, Ca, Zn; R = alkyl or OTf) and LH at reflux temperature, formation of bis(guanidinate) magnesium, calcium, and zinc complexes have been observed. The solid state structures of LH(1)
[LM(thf)n L] [L = ArNC(N i Pr 2)NAr}(Ar = 2,6 - Me 2 -C 6 H 3)] M = Mg,Ca和Zn;n = 0–1)已通过三种不同的合成途径合成。首先,用游离态处理Mg,Ca和Zn的双双(三甲基硅烷基)酰胺} s,即[M (N(SiMe 3)2 } 2 ](M = Mg,Ca(thf)2和Zn)胍配体(LH)在80 ° C,消除NH(SiMe 3)2并形成[LM(thf)n L](M = Mg,Ca和Zn; n = 0–1)(3 – 5)出现复合物。其次,两当量的LH钾盐与金属二卤化物通过盐复分解反应导致均均络合物的形成。第三,在回流温度下,MR 2(M = Mg,Ca,Zn; R =烷基或OTf)与LH之间的反应,已观察到双(胍基)镁,钙和锌络合物的形成。LH(的固态结构1),LK(2),并且所有三个双(胍基)镁,钙和锌配合物(3
Sodium Hydride Catalyzed Tishchenko Reaction
作者:Thomas Werner、Juliane Koch
DOI:10.1002/ejoc.201001294
日期:2010.12
of aldehydes is described. The conversion of aromatic and even heteroaromatic aldehydes in the presence of catalytic amounts of sodium hydride leads to the corresponding Tishchenko esters in high yields (up to 95 %). The reaction can be performed under standard laboratory conditions and on a multigram scale (up to 10 g).