α-Hydroxyimine palladium complexes: Synthesis, molecular structure, and their activities towards the Suzuki–Miyaura cross-coupling reaction
作者:Xiao Tang、Ying-Tang Huang、Huan Liu、Rui-Zhi Liu、Dong-Sheng Shen、Ning Liu、Feng-Shou Liu
DOI:10.1016/j.jorganchem.2013.01.018
日期:2013.4
[Ar–NC(R)–(R)C(CH3)OH] (L1, R = Acenaphthyl, Ar = 2,6-diisopropylphenyl; L2, R = Ph, Ar = 2,6-dimethylphenyl; L3, R = Ph, Ar = 2,6-diisopropylphenyl). The reaction of PdCl2 with 1 equiv of the ligand L1–3 in methanol affords the four-coordinate palladiumcomplex with the general formula LPdCl2 (1–3). The molecular structures of L3, as well as the palladiumcomplexes 1 and 3, were established by single-crystal
Novel Oxidovanadium Complexes with Redox-Active R-Mian and R-Bian Ligands: Synthesis, Structure, Redox and Catalytic Properties
作者:Anton N. Lukoyanov、Iakov S. Fomenko、Marko I. Gongola、Lidia S. Shul’pina、Nikolay S. Ikonnikov、Georgiy B. Shul’pin、Sergey Y. Ketkov、Georgy K. Fukin、Roman V. Rumyantcev、Alexander S. Novikov、Vladimir A. Nadolinny、Maxim N. Sokolov、Artem L. Gushchin
DOI:10.3390/molecules26185706
日期:——
structural analysis. The vanadium atom in these structures has an octahedral coordination environment. Complex 4 has an unexpected structure. Firstly, it contains 3,5-(CF3)2C6H3-bian instead of 3,5-(CF3)2C6H3-mian. Secondly, it has a binuclear structure, in contrast to 3, in which two oxovanadium parts are linked to each other through V=O···Vinteraction. This interaction is non-covalent in origin
合成并进一步开发了一种新的单亚氨基苊酮 3,5-(CF 3 ) 2 C 6 H 3 -mian(配合物2),与已知的单亚氨基苊酮 dpp-mian 一起获得氧化钒(IV)配合物 [VOCl 2 (dpp) -mian)(CH 3 CN)] ( 3 ) 和 [VOCl(3,5-(CF 3 ) 2 C 6 H 3 -bian)(H 2 O)][VOCl 3 (3,5-(CF 3 ) 2 C 6 H 3 -bian)]·2.85DME ( 4 ) 来自 [VOCl 2 (CH)3 CN) 2 (H 2 O)]( 1 )或[VCl 3 (THF) 3 ]。所有化合物的结构均使用 X 射线结构分析确定。这些结构中的钒原子具有八面体配位环境。复合体4具有意想不到的结构。首先,它包含3,5-(CF 3 ) 2 C 6 H 3 -bian 而不是3,5-(CF 3 ) 2 C 6 H 3 -mian。其次
Efficient and chemoselective hydroboration of organic nitriles promoted by TiIV catalyst supported by unsymmetrical acenaphthenequinonediimine ligand
作者:Indrani Banerjee、Srinivas Anga、Kulsum Bano、Tarun K. Panda
DOI:10.1016/j.jorganchem.2019.120958
日期:2019.12
titanium complex [(η5-C5H5)L}TiCl2] (1) in good yield. The molecular structures of the N-silyl ligand (LSiMe3) and Ti(IV) complex 1 were established by single-crystal X-ray analysis. Complex 1 was tested as a pre-catalyst for hydroboration of nitriles with pinacolborane (HBpin) and catecholborane (HBcat) to afford diboryl amines at ambient temperature. Titanium complex 1 exhibited high conversion, superior
Modelling of Transition State in Grignard Reaction of Rigid N-(Aryl)imino-Acenapthenone (Ar-BIAO): A Combined Experimental and Computational Study
作者:Srinivas Anga、Sayak Das Gupta、Supriya Rej、Bhabani S. Mallik、Tarun K. Panda
DOI:10.1071/ch14399
日期:——
solid state structures of compounds 1a–3a were established by single-crystal X-ray diffraction analysis. To model the transition state of the Grignard reaction with asymmetrical and sterically rigid Ar-BIAO ligands having three fused rings containing exo-cyclic carbonyl and imine functionalities, we carried out computational analysis. During our study, we have considered the gas phase addition of CH3MgBr
我们提出了将格氏试剂RMgBr / RMgI(R = Me,Et)添加到各种空间刚性N-(芳基)亚氨基-en烯酮(Ar-BIAO)(Ar = 2,6- i Pr 2 C 6 H 3(1),2,6-Me 2 C 6 H 3(2)和2,4,6-Me 3 C 6 H 2(3)配体)。在实验方法中,当化合物1 - 3分别在室温下用RMgBr(R =甲基,乙基)处理,相应的外消旋Ñ-(芳基)亚氨基-en烯-1-醇(Ar-BIAOH)化合物(Ar = 2,6- i Pr 2 C 6 H 3,R = Me(1a),Et(1b); Ar = 2,6-得到Me 2 C 6 H 3,R = Me(2a),Et(2b);和Ar = 2,4,6-Me 3 C 6 H 2,R = Me(3a),Et(3b))在产率高达82%。通过光谱和燃烧分析对Ar-BIAOH化合物进行了表征。化合物1a – 3a的固态结构通过单
Zinc catalyzed Guanylation reaction of Amines with Carbodiimides/ Isocyanate leading to Guanidines/Urea derivatives formation
作者:JAYEETA BHATTACHARJEE、MITALI SACHDEVA、INDRANI BANERJEE、TARUN K PANDA
DOI:10.1007/s12039-016-1096-y
日期:2016.6
donating groups underwent higher conversion than the amines having electron withdrawing groups to afford corresponding guanidine or urea derivatives. A possible mechanism involving penta-coordinated zinc transition state for the catalytic reaction is presented. We report the highly chemo-selective catalytic addition of N–H bonds from various aromatic amines to carbodiimides and isocyanates using (Ar-BIAO)ZnCl2
我们报道了使用(Ar-BIAO)ZnCl 2络合物[Ar-BIAO = N-(芳基)亚氨基-en烯酮,Ar = 2,6],从各种芳香胺向碳二亚胺和异氰酸酯的N–H键的高化学选择性催化加成反应-Me 2 C 6 H 3(1),2,4,6 Me 3 C 6 H 2(2),2,6- i Pr 2 C 6 H 3(3)]作为制备胍的前催化剂和尿素衍生物的产率为55-90%。配合物3显示出比类似配合物1高的催化活性和2在相似的反应条件下。N-H键与杂聚枯烯的催化鸟嘌呤化作用显示出广阔的底物范围。具有给电子基团的胺比具有吸电子基团的胺具有更高的转化率,以提供相应的胍或脲衍生物。提出了涉及五配位锌过渡态的催化反应的可能机理。 我们报道了使用(Ar-BIAO)ZnCl 2络合物[Ar-BIAO = N-(2,6-二异丙基苯基)亚氨基-en烯酮,从各种芳族胺到碳二亚胺和异氰酸酯的N-H键的高化学选择性催化加成[