A General Study of[(η5-Cp′)2Ti(η2-Me3SiC2SiMe3)]-Catalyzed Hydroamination of Terminal Alkynes: Regioselective Formation of Markovnikov and Anti-Markovnikov Products and Mechanistic Explanation (Cp′=C5H5, C5H4Et, C5Me5)
作者:Annegret Tillack、Haijun Jiao、Ivette Garcia Castro、Christian G. Hartung、Matthias Beller
DOI:10.1002/chem.200305674
日期:2004.5.17
A generalstudy of the regioselectivehydroamination of terminalalkynes in the presence of [(eta5-Cp)2Ti(eta2-Me3SiC2SiMe3)] (1), [(eta5-CpEt)2Ti(eta2-Me3SiC2SiMe3)] (CpEt=ethylcyclopentadienyl) (2), and [(eta5-Cp*)2Ti(eta2-Me3SiC2SiMe3)] (Cp*=pentamethylcyclopentadienyl) (3) is presented. While aliphatic amines give mainly the anti-Markovnikovproducts, anilines and aryl hydrazines yield the Markovnikov
Comparison of Decamethyldizincocene [(η<sup>5</sup>-Cp*)<sub>2</sub>Zn<sub>2</sub>] versus Decamethylzincocene [Cp*<sub>2</sub>Zn] and Diethylzinc Et<sub>2</sub>Zn As Precatalysts for the Intermolecular Hydroamination Reaction
作者:Anja Lühl、Larissa Hartenstein、Siegfried Blechert、Peter W. Roesky
DOI:10.1021/om300649q
日期:2012.10.22
organometallic zinc compound [Cp*2Zn] and ZnEt2 for the intermolecular hydroamination reaction in the presence of equimolar amounts of [PhNMe2H][B(C6F5)4] is reported. All compounds show high reaction rates under mild conditions and a good functional group tolerance for the addition of aniline derivatives to primary alkynes. Within this series the metallocene [Cp*2Zn] is the most active one, whereas
A Convenient Rhodium-Catalyzed Intermolecular Hydroamination Procedure for Terminal Alkynes
作者:Christian G. Hartung、Annegret Tillack、Harald Trauthwein、Matthias Beller
DOI:10.1021/jo010444t
日期:2001.9.1
intermolecular hydroamination of alkynes is presented. Terminalalkynes react efficiently with anilines in the presence of cationic rhodium(I) catalysts under very mild reaction conditions (e.g., base and acid free at room temperature) to yield up to 99% of the corresponding imines. An easy one-pot protocol for the synthesis of secondary amines was developed by combining this alkyne amination reaction
A Dramatic Effect of Aryloxo Ligands on the Titanium-Catalyzed Hydroamination of Alkynes
作者:Vivek Khedkar、Annegret Tillack、Matthias Beller
DOI:10.1021/ol035653+
日期:2003.12.1
[GRAPHICS]The aryloxotitanium complex 1 is a highly chemo- and regioselective catalyst for intermolecular hydroamination of terminal alkynes. Branched imines are obtained in good to excellent yield (up to 99%) with various primary aromatic and aliphatic amines.
Ethyl-Zinc(II)-Cation Equivalents: Synthesis and Hydroamination Catalysis
作者:T. O. Petersen、E. Tausch、J. Schaefer、H. Scherer、P. W. Roesky、I. Krossing
DOI:10.1002/chem.201502328
日期:2015.9.21
Ion‐like ethylzinc(II) compounds with weakly coordinating aluminates [Al(ORF)4]− and [(RFO)3Al‐F‐Al(ORF)3]− (RF=C(CF3)3) were synthesized in a one‐pot reaction and fully characterized by single‐crystal X‐ray diffraction, NMR and vibrational spectroscopy, and by quantum chemical calculations. The catalytic activity of ion‐like Et‐Zn[Al(ORF)4] in intermolecular hydroamination and in the unusual double
具有弱配位铝酸盐[Al(OR F)4 ] -和[(R F O)3 Al-F-Al(OR F)3 ] -(R F = C(CF 3)3)是通过一锅法合成的,并通过单晶X射线衍射,NMR和振动光谱以及量子化学计算进行了全面表征。离子状Et-Zn [Al(OR F)4的催化活性进行了分子间加氢和苯胺和炔烃的非常规双加氢反应。与在2.5摩尔%的较低催化剂负载量下原位生成的Et 2 Zn / [PhNMe 2 H] + [B(C 6 F 5)4 ] -体系相比,也发现了良好的性能。