Visible‐Light‐Enabled Direct Decarboxylative N‐Alkylation
作者:Vu T. Nguyen、Viet D. Nguyen、Graham C. Haug、Ngan T. H. Vuong、Hang T. Dang、Hadi D. Arman、Oleg V. Larionov
DOI:10.1002/anie.201916710
日期:2020.5.11
development of efficient and selective C-N bond-forming reactions from abundant feedstock chemicals remains a central theme in organic chemistry owing to the key roles of amines in synthesis, drug discovery, and materials science. Herein, we present a dual catalyticsystem for the N-alkylation of diverse aromatic carbocyclic and heterocyclic amines directly with carboxylicacids, by-passing their preactivation
An Aminopyridinato Titanium Catalyst for the Intramolecular Hydroaminoalkylation of Secondary Aminoalkenes
作者:Jaika Dörfler、Besnik Bytyqi、Sascha Hüller、Nicola M. Mann、Christian Brahms、Marc Schmidtmann、Sven Doye
DOI:10.1002/adsc.201500287
日期:2015.7.6
2‐(methylamino)pyridinato titanium complex initially synthesized by Kempe is used as catalyst for efficient intramolecularhydroaminoalkylation reactions of secondaryaminoalkenes. The corresponding reactions of N‐aryl‐substituted 1‐aminohept‐6‐enes and 1‐aminohex‐5‐enes directly give access to 2‐methylcyclohexyl‐ or 2‐methylcyclopentylamines in good yields. In addition, intramolecularhydroaminoalkylations of an N‐alkyl‐substituted
Titanium-Catalyzed Hydroaminoalkylation of Alkenes by CH Bond Activation at sp<sup>3</sup>Centers in the α-Position to a Nitrogen Atom
作者:Raphael Kubiak、Insa Prochnow、Sven Doye
DOI:10.1002/anie.200805169
日期:2009.1.26
Good for primary and secondary amines: Hydroaminoalkylations of alkenes, which take place by CHbondactivation in the α‐position to nitrogen atoms, are catalyzed by various neutral titanium complexes (see scheme). Primary as well as secondary amines can be used as substrates, and the reactions can be achieved intra‐ and intermolecularly.
generation of alkylradicals from inert alkyl C-O bonds has been developed via an iron/borane reagent/alkoxide catalytic system, which can be employed for the synthesis of amines from nitroarenes with excellent efficiency. This reductive amination features good functional group compatibility and enables the late-stage amination of bio-relevant compounds, thus providing good opportunities for applications