Synthesis of Polysubstituted Quinolines from α-2-Aminoaryl Alcohols Via Nickel-Catalyzed Dehydrogenative Coupling
作者:Sanju Das、Debabrata Maiti、Suman De Sarkar
DOI:10.1021/acs.joc.7b03198
日期:2018.2.16
This study reports a nickel-catalyzed sustainable synthesis of polysubstitutedquinolines from α-2-aminoaryl alcohols by a sequential dehydrogenation and condensation process that offers the advantages of a low catalyst loading and wide substrate scope. In contrast to earlier reported methods, this strategy allows the use of both primary as well as secondary α-2-aminoaryl alcohols in combination with
A sustainable sequential multicomponent method for the synthesis of highly functionalized quinolines from renewable starting materials was shown via manganese catalysis. The synthesized quinoline derivatives were further utilized to prepare new type of quinoline derived azafluorenes via unprecedented direct C(sp3)−H bond hydroxylation and Friedel–Crafts-type annulation.
In this work, we have constructed three new Co(II) complexes in which steric features govern their structural geometry. The metal ligand-cooperation behavior of the alkoxy arm is utilized to explore the catalytic activities of these complexes with respect to dehydrogenation. A wide range of C-3-substituted quinoline and quinazoline derivatives were synthesized in high yields. The developed protocol’s
Metal-free intramolecular oxidative decarboxylative amination of primary α-amino acids with product selectivity
作者:Yizhe Yan、Zhiyong Wang
DOI:10.1039/c1cc12885j
日期:——
A novel metal-free intramolecular oxidative decarboxylative coupling of primary α-amino acids with 2-aminobenzoketones under mild and neutral conditions was developed. Different quinazolines can be selectively obtained by various oxidants.
Metal free carboamination of internal alkynes – an easy access to polysubstituted quinolines
作者:T. Stopka、M. Niggemann
DOI:10.1039/c5cc10460b
日期:——
A transition metalfree carboamination of unactivated alkynes towards highly substituted quinolines was realized in the presence of a synergistic Bronsted acid based catalyst system. The mechanism was confirmed to...