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
Rare earth metal bis(trimethylsilyl)amido complexes bearing pyrrolyl-methylamide ligand. Synthesis, structure, and catalytic activity towards guanylation of amines
作者:Chao Liu、Shuangliu Zhou、Shaowu Wang、Lijun Zhang、Gaosheng Yang
DOI:10.1039/c0dt00246a
日期:——
elemental analyses. The structures of complexes 2, 4 and 6 were determined by single-crystal X-ray analyses. X-Ray analyses discovered that two rare-earth metal ions were bridged by dianion ligand with the pyrrolyl ring which coordinated to one rareearth metal in an η5 mode, the tethered nitrogen anion and nitrogen atom of the pyrrolyl ring coordinated to another rareearth metal in η1 modes forming
所述Ñ -arylaminomethyl取代吡咯基通过还原2-[(2,4,6-Me 3 C 6)合成配体2-[(2,4,6-Me 3 C 6 H 2)NHCH 2 ](C 4 H 3 NH)(1)H 2)N CH](C 4 H 3 NH)使用NaBH 4。治疗[(Me 3 Si)2 N] 3 Ln(μ-Cl)Li(THF)31当量 回流中的1甲苯24小时,得到相应的三价稀土金属的酰胺与式(μ-η 5:η 1):η 1 -2 - [(2,4,6--ME 3 c ^ 6 ħ 2)NCH 2 ]Ç 4 H 3 N] LnN(SiMe 3)2 } 2(Ln = Y(2),Nd(3),Sm(4),Dy(5),Er(6))。所有化合物均通过光谱法和元素分析充分表征。复合物的结构2,4和6通过单晶X射线分析确定。X射线分析发现两个稀土类金属离子,通过与配位的一种稀土金属中的η的吡咯环的二价阴离子配体桥
Hydroamination of Carbodiimides Catalyzed by Lithium Triethylborohydride
作者:Ziyuan Pang、Zonggang Du、Xin Wen
DOI:10.1055/a-1979-8930
日期:2023.4
triethylborohydride (LiHBEt3) with a lower load of 0.5 mol% acts as an efficient catalyst for the hydroamination of various carbodiimides. It achieved good functional group tolerance under mild and solvent-free conditions. The possible mechanism and pathways of LiHBEt3 catalyzing the hydroamination of various carbodiimides are proposed.
First iron-catalyzed guanylation of amines: a simple and highly efficient protocol to guanidines
作者:Srinivas Pottabathula、Beatriz Royo
DOI:10.1016/j.tetlet.2012.07.065
日期:2012.9
The first iron-catalyzed guanylation of amines is reported. Commercially available Fe(OAc)(2) acts as an excellent catalyst for the addition of amines to carbodiimides. The reaction is broadly applicable to a variety of primary, secondary, and heterocyclic amines, and tolerates a wide range of functionalities allowing the easy preparation of a large family of guanidines. The low price and low toxicity of the commercially available iron catalyst make this methodology highly attractive. (C) 2012 Elsevier Ltd. All rights reserved.
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。