Through cooperative actions of iridium catalyst and NaOTf additive we report a new direct access to nitrogen bi-heteroarenes via hydrogen-evolution cross-coupling of the β-site of indoles/pyrrole with the α-site of N-heteroarenes. The reaction proceeds in an atom- and redox-economic fashion together with the merits of an easily available catalyst system, broad substrate scope, excellent functional
A practical approach to the direct α-methylation of 1,8-naphthyridines under mild reaction conditions has been developed using simple and readily available DMSO as a convenient and environmentally friendly carbon source.
Catalytic activity in transfer hydrogenation using ruthenium (II) carbonyl complexes containing two 1,8-naphthyridine as N-monodentate ligands
作者:Juana Gajardo、Juan C. Araya、Andrés Ibáñez、Véronique Guerchais、Hubert Le Bozec、Sergio A. Moya、Pedro Aguirre
DOI:10.1016/j.ica.2018.10.037
日期:2019.2
N-monodentate fashion. The ruthenium(II) complexes have been studied as catalysts in the transfer hydrogenation of acetophenone. We found that complexes show moderate activities and a 100% selectivity. The best turnover frequency (390 h−1) is found for cis-[RuCl2(CO)2(2-(4′-methoxyphenyl)-1,8-naphthyridine-κN8)2] when the substrate/catalysis ratio was 1000/1. The catalytic conditions were optimized
Reductive functionalization of N-heteroarenes remains to date a challenge due to the easy occurrence of direct reduction of such substances into non-coupling saturated cyclic amines. Herein, by developing an unprecedented manganese catalyst ligating with an unsymmetrical 2-aminotetrahydronaphthyridyl PNP-ligand, we have achieved a new reductive cross-coupling of indoles/pyrroles and N-heteroarenes
An iridium-catalyzed hydrogentransfer strategy, enabling straightforward access to tetrahydropyridine derivatives from aryl-1,8-naphthyridines and indolines was developed. This method has unprecedented advantages, including high step economy. In addition, it does not produce any byproducts or require an external high-pressure H2 gas source. The method offers an important platform for the transformation
开发了一种铱催化的氢转移策略,可以直接从 aryl-1,8-naphthyridines 和二氢吲哚获得四氢吡啶衍生物。这种方法具有前所未有的优势,包括高步骤经济性。此外,它不会产生任何副产品,也不需要外部高压 H 2气源。该方法为将 1,8-萘啶和二氢吲哚转化为功能化产品提供了重要平台。