Synthesis of Guanidines from Amines and Carbodiimides Catalyzed by Mono-Indenyl-Ligated Rare Earth Metal Bis(silylamide) Complexes
作者:Jue Chen、Yibin Wang、Yunjie Luo
DOI:10.1002/cjoc.201300302
日期:2013.8
Nucleophilic addition of primary aromatic amines to carbodiimides in the presence of catalytic amount of the mono‐indenyl‐ligated rareearthmetal bis(silylamide) complexes (C9H6CMe2CH2C5H4N‐α)Ln[N(SiHMe2)2]2 at room temperature afforded efficiently a series of guanidines with a wide spectrum of substituents on the nitrogen atoms.
在催化量的单茚基连接的稀土金属双(甲硅烷基酰胺)络合物(C 9 H 6 CMe 2 CH 2 C 5 H 4 N‐ α)Ln [N( SiHMe 2)2 ] 2在室温下有效地提供了一系列在氮原子上具有广泛取代基的胍。
Synthesis, structure and catalytic activity of rare-earth metal amino complexes incorporating imino-functionalized indolyl ligand
6H4CH=N-CH2CH2)C8H5]RE[N(SiMe3)2]2(µ-Cl)Li(THF)} (RE = Y(1), Sm(2), Gd(3), Er(4), Yb(5)). By extending the reaction time, only the reaction of HL with [(Me3Si)2N]3Gd(µ-Cl)Li(THF)3 gave an unexpected binuclear rare-earth metal complex [(µ-η5:η1):η1:η1-3-[(Me2N)2-C14H9]-(NCH2CH2-C8H5N)2]Gd2[N(SiMe3)2]3} (6) incorporating a novel polycyclic ligand through C-C and C-N coupling. Treatment of HL with [
亚氨基官能化的吲哚基配体(H L,L = 3-(4-Me 2 N-C 6 H 4 CH = N-CH 2 CH 2)C 8 H 5 N)与稀土金属酰胺的反应[(研究了产生不同类型稀土金属酰胺配合物的Me 3 Si)2 N] 3 RE(µ -Cl)Li(THF)3。H L与1当量的反应。[(Me 3 Si)2 N] 3 RE(µ -Cl)Li(THF)3的原子数产生了一系列的异核双金属稀土类金属的氨基络合物[ η 1:μ - η 2 -3-(4-我2 N-C 6 H ^ 4 CH = N-CH 2 CH 2)C 8 H ^ 5 ] RE [N(SiMe 3)2 ] 2(μ- Cl)Li(THF)}(RE = Y(1),Sm(2),Gd(3),Er(4),Yb(5))。通过延长反应时间,仅H L与[(Me 3 Si)2 N] 3的Gd(μ -Cl)的Li(THF)3,得到意想不到的双核稀土类金属络合物[(μ
Catalytic C–N bond formation in guanylation reaction by N-heterocyclic carbene supported magnesium(II) and zinc(II) amide complexes
作者:Ashim Baishya、Milan Kr. Barman、Thota Peddarao、Sharanappa Nembenna
DOI:10.1016/j.jorganchem.2014.07.021
日期:2014.10
The catalytic activity of N-heterocycliccarbene (NHC) supported magnesium(II) and a zinc(II) amide complex towards the addition of N–H bond of amine to carbodiimide was studied. Treatment of a free carbene i.e., 1,3-di-tert-butylimidazol-2-ylidene (ItBu) with magnesium and zinc bis(amide) i.e., M[N(SiMe3)2]2, M = Mg or Zn in toluene led to the formation of ItBu:M[N(SiMe3)2]2, M = Mg(1) and Zn(2) compounds
Aluminum Alkyl Complexes Supported by Bidentate N,N Ligands: Synthesis, Structure, and Catalytic Activity for Guanylation of Amines
作者:Yun Wei、Shaowu Wang、Shuangliu Zhou、Zhijun Feng、Liping Guo、Xiancui Zhu、Xiaolong Mu、Fangshi Yao
DOI:10.1021/acs.organomet.5b00101
日期:2015.5.26
respectively. The structures of complexes 2–6 were characterized by spectral methods and X-ray crystallographic analyses. These aluminumcomplexes showed a high catalytic activity in the addition of amines to carbodiimides to form guanidines. The mechanism of the catalytic process was studied by control experiments and 1H NMR monitoring. Together with the isolation of the complex [2-(2,6-Me2C6H3N═
研究了AlMe 3或AlEt 3与2-吡啶基或吲哚基取代的亚胺的反应,导致形成不同的有机铝络合物。亚氨基吡啶Cy [N═CMe-2-(C 5 H 4 N)] 2(L 1)的反应是由1-(吡啶-2-基)乙酮和反式-1,2-环己二胺与AlEt 3的反应得到铝络合物Cy [NC(Me)(Et)-2-(C 5 H 4 N)AlEt 2 ] 2(1),其中通过添加两个乙基将配体的两个酮亚胺基转化为酰胺官能团,L 1与AlMe 3的反应得到铝络合物Cy [NC(2CH 2)-2-(C 5 H 4 N)AlMe 2 ] 2(2)通过sp 3 C–H活化并消除了两个甲烷分子。吲哚基-2-醛亚胺(2-(RN═CH)C 8 H 5 NH(R = t Bu(L 2 H),C 6 H 5(L 3 H),2,6-Me 2 C 6 H 3(L 4 H))与AlMe 3或AlEt 3仅提供去质子化的吲哚基铝配合物[2-(RN═CH)C
Copper oxide supported on magnetic nanoparticles (CuO@γ-Fe<sub>2</sub>
O<sub>3</sub>
): An efficient and magnetically separable nanocatalyst for addition of amines to carbodiimides towards synthesis of substituted guanidines
作者:Sepideh Abbasi、Dariush Saberi、Akbar Heydari
DOI:10.1002/aoc.3695
日期:2017.9
Copper oxide supported on magneticnanoparticles was used as a green magneticnanocatalyst for hydroamination of carbodiimides towards the synthesis of guanidines. Easy preparation and separation, low cost, non‐sensitivity to moisture and reusability of the catalyst along with diversity and high yield of products are significant features of this method.