One-pot Suzuki–Miyaura cross-coupling followed by reductive monoalkylation of the resulting nitro biaryl system utilizing Pd/C as catalyst
摘要:
Conditions for one-pot Suzuki-Miyaura cross-coupling between aryl boronic acids and bromo-nitrobenzene followed by reductive monoalkylation of the nitro functionality of the biaryl cross-coupling product utilizing hydrogen over Pd/C as the catalyst and aldehydes as alkylation agent are described. (C) 2013 Elsevier Ltd. All rights reserved.
Cu-Catalyzed Carbon-Heteroatom Coupling Reactions under Mild Conditions Promoted by Resin-Bound Organic Ionic Bases
作者:Yao-Bing Huang、Chu-Ting Yang、Jun Yi、Xiao-Jian Deng、Yao Fu、Lei Liu
DOI:10.1021/jo101917x
日期:2011.2.4
is slightly better than that of the corresponding Cs salts in Cu-catalyzed C−Ncross-couplings, while the tetraalkylphosphonium-type RBOIBs are significantly better than all the inorganic bases. With these newly developed RBOIBs, room-temperature Cu-catalyzed C−N coupling with various nonactivated aryliodides and even aryl bromides can be readily accomplished. Moreover, RBOIBs can be easily recycled
Ligand-free CuSO4-Catalyzed C-N Coupling Reaction of Aryl Halides with Alkylamines or N-heterocycles in Aqueous Solution System
作者:Hua Yang、Xiuli Zhang、Jingyu Si
DOI:10.14233/ajchem.2013.oh47
日期:——
during the repetitive use of these catalyst systems. Therefore, catalytic systems without ligands are of special interest. Cu(I)catalyzed C-Ncross-couplingreaction was reported using organic anion bases, such as quaternary ammonium hydroxide, which can contribute to form a homogeneous catalytic system. In present work, we report that C-N coupling reaction of aryl iodides and bromides with alkyl amines
However, catalysts developed thus far that are effective for this process remain quite scarce and are only limited to a few ruthenium and iridium complexes. In this work, we present a cobalt-catalyzedselectivealkylation of amines with amines to synthesize a large variety of secondary amines. A range of amine substrates have been converted to the corresponding products through hetero- or homocoupling
作者:Roychowdhury, Pritam、Waheed, Saim、Sengupta, Uddalak、Herrera, Roberto G.、Powers, David C.
DOI:10.1021/acs.orglett.4c01430
日期:——
N-centered nucleophilicity increases upon alkylation, and thus selective partial alkylation of ammonia and primary amines can be challenging: Poor selectivity and overalkylation are often observed. Here we introduce N-aminopyridinium salts as ammonia surrogates for the synthesis of secondaryamines via self-limiting alkylation chemistry. Readily available N-aryl-N-aminopyridinium salts engage in N-alkylation
Discovery of <i>N</i>-(Naphthalen-1-yl)-<i>N</i>′-alkyl Oxalamide Ligands Enables Cu-Catalyzed Aryl Amination with High Turnovers
作者:Jie Gao、Subhajit Bhunia、Kailiang Wang、Lu Gan、Shanghua Xia、Dawei Ma
DOI:10.1021/acs.orglett.7b00901
日期:2017.6.2
A Class of N-(naphthalen-1-yl)-N'-alkyl oxalamides have been proven to be powerful ligands, making a coupling reaction of (hetero)aryl iodides with primary amines proceed at 50 degrees C with only 0.01 mol % of Cu2O and ligand as well as a coupling reaction of (hetero)aryl bromides with primary amines and ammonia at 80 degrees C with only 0.1 mol % of Cu2O and ligand. A wide range of coupling partners work well under these conditions thereby providing an easy to operate method for preparing (hetero)atyl amines.