hydroaminoalkylation of terminal alkenes, 1,3‐dienes, or styrenes allows a direct and highly atom efficient (100 %) synthesis of amines which can result in the formation of two regioisomers, the linear and the branched product. We present a new titanium catalyst with 2,6‐bis(phenylamino)pyridinato ligands for intermolecular hydroaminoalkylation reactions of styrenes and 1‐phenyl‐1,3‐butadienes that delivers the
Aminopyridinato Titanium Catalysts for the Hydroaminoalkylation of Alkenes and Styrenes
作者:Jaika Dörfler、Sven Doye
DOI:10.1002/anie.201206027
日期:2013.2.4
The linear product is formed as the major product when in situ generated titanium complexes with aminopyridinato ligands are used as catalysts for hydroaminoalkylation reactions of styrenes (see scheme). The reaction is not limited to the use of N‐methylanilines and for the first time can be performed with N‐alkylanilines bearing alkyl groups larger than methyl, or even with dialkylamines. The best
TaMe<sub>3</sub>Cl<sub>2</sub>-Catalyzed Intermolecular Hydroaminoalkylation: A Simple Complex for Enhanced Reactivity and Expanded Substrate Scope
作者:Zhengxing Zhang、Jean-Denys Hamel、Laurel L. Schafer
DOI:10.1002/chem.201300992
日期:2013.7.1
Tantalizingly simple: The common organometallic starting material TaMe3Cl2 can be used for the catalytic CH functionalization reaction, hydroaminoalkylation. The substrate scope for this readily accessed compound includes unactivated terminal and internal alkenes, styrene derivatives, and both alkylaryl‐ and dialkyl secondary amines (see scheme).
A New<i>N</i>-Trityl-Substituted Aminopyridinato Titanium Catalyst for Hydroamination and Hydroaminoalkylation Reactions - Unexpected Intramolecular C-H Bond Activation
作者:Lars H. Lühning、Christian Brahms、Jelte P. Nimoth、Marc Schmidtmann、Sven Doye
DOI:10.1002/zaac.201500542
日期:2015.10
idine is used for the synthesis of a mono(2,6-diaminopyridinato) titanium complex that undergoes unexpected intramolecular C–H bond activation to give access to an unusual 1-titanaisoindoline derivative. Both titanium complexes do not show high catalytic activity for hydroaminoalkylation reactions of alkenes but exceptional results are obtained in the field of alkene, alkyne, and allene hydroamination
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