The B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Tandem Meinwald Rearrangement–Reductive Amination
作者:Martine R. Tiddens、Robertus J. M. Klein Gebbink、Matthias Otte
DOI:10.1021/acs.orglett.6b01744
日期:2016.8.5
A system of three coupledcatalytic cycles enabling the one-pot transformation of epoxides to amines via Meinwald rearrangement, imine condensation, and iminereduction is described. This assisted tandem catalysis is catalyzed by B(C6F5)3 resulting in the first tandem Meinwald rearrangement–reductive amination protocol. The reaction proceeds in nondried solvents and yields β-functionalized amines.
描述了三个耦合的催化循环的系统,该系统能够通过Meinwald重排,亚胺缩合和亚胺还原将环氧化物一锅转化为胺。这种辅助的串联催化由B(C 6 F 5)3催化,从而产生了第一个串联的Meinwald重排-还原胺化方案。该反应在未干燥的溶剂中进行,并产生β-官能化的胺。特别地,以高收率获得β-二芳基胺。
[Ind<sub>2</sub>TiMe<sub>2</sub>]: A Catalyst for the Hydroaminomethylation of Alkenes and Styrenes
作者:Raphael Kubiak、Insa Prochnow、Sven Doye
DOI:10.1002/anie.200906557
日期:2010.3.29
Metal‐catalyzed hydroaminomethylations of styrenes, which take place by CH bond activation, can be achieved in the presence of the catalyst [Ind2TiMe2] (Ind=η5‐indenyl). Corresponding reactions of 1‐alkenes with N‐methylanilines performed at temperatures between 80 °C and 105 °C usually take place with regioselectivities of better than 99:1 in favor of the branched product.
A Commercially Available Tantalum Catalyst for the Highly Regioselective Intermolecular Hydroaminoalkylation of Styrenes
作者:Jaika Dörfler、Sven Doye
DOI:10.1002/ejoc.201400082
日期:2014.5
hydroaminoalkylation of terminal alkenes or styrenes enables a direct and 100 % atom-efficient synthesis of amines and can generally result in the formation of two regioisomers, the branched and the linear product. Herein, we report that high-yielding intermolecular hydroaminoalkylation reactions of styrenes can be achieved with excellent regioselectivities in the presence of the commercially available
Rhodium-catalyzed hydroaminomethylation of various vinyl arenes with anilines has been accomplished using water as an environmentally benign reaction media. This aqueous reaction is facilitated by the water-soluble diphosphine ligands derived from bis(2-(diphenylphosphaneyl)ethyl)amides. The methodology demonstrated a broad scope of substrates and accessed the N-(2-phenylpropyl)anilines in good yields