Recent progress in copper-catalyzed CN coupling reactions

YF WANG, JH CENG, XR CUI - Chinese Journal of Organic …, 2010 - sioc-journal.cn
The recent progress in copper-catalyzed CN cross-coupling reactions is reviewed.
According to the different compounds containing nitrogen, the nucleophiles are divied into …

α-Pyridylation of chiral amines via urea coupling, lithiation and rearrangement

J Clayden, U Hennecke - Organic letters, 2008 - ACS Publications
2-, 3-and 4-Bromopyridine, along with other brominated electron-deficient arenes, undergo
palladium-catalyzed coupling with ureas of structure RNMeCONHMe. Where R is a chiral, α …

Scalable, one-pot, microwave-accelerated tandem synthesis of unsymmetrical urea derivatives

AR Kulkarni, S Garai, GA Thakur - The Journal of organic …, 2017 - ACS Publications
We report a facile, microwave-accelerated, one-pot tandem synthesis of unsymmetrical
ureas via a Curtius rearrangement. In this method, one-pot microwave irradiation of …

Copper (I)-catalyzed amination of aryl halides in liquid ammonia

P Ji, JH Atherton, MI Page - The Journal of Organic Chemistry, 2012 - ACS Publications
The amination of aryl halides in liquid ammonia (LNH3) is catalyzed by a copper (I)
salt/ascorbate system to yield primary aromatic amines in good to excellent yields. The low …

Research progress of diphenyl urea derivatives as anticancer agents and synthetic methodologies

YC Wu, XY Ren, GW Rao - Mini-Reviews in Organic Chemistry, 2019 - ingentaconnect.com
The malignant neoplasm, which is recognized as cancer, is a serious threat to human health
and frequently-occurring disease. Diphenylurea, an important link structure in the design of …

Switching chemoselectivity based on the ring size: how to make ring-fused indoles using transition-metal-mediated cross-coupling

JY Kim, W Lee, HJ Kang, TH Jeon, MH Baik… - ACS …, 2021 - ACS Publications
Pyrroloazocine indole alkaloids consisting of eight-membered azacycle fused to pyrrole and
indole units exhibit intriguing pharmacological functions but still pose a synthetic challenge …

Dual palladium–photoredox catalyzed chemoselective C–H arylation of phenylureas

SS Babu, M Shahid, P Gopinath - Chemical Communications, 2020 - pubs.rsc.org
A highly chemoselective C–H arylation of phenylureas has been accomplished using dual
palladium–photoredox catalysis at room temperature without any additives, base or external …

Efficient ligand-free copper-catalyzed C–S cross-coupling of thiols with aryl iodides using KF/Al2O3 as base

YS Feng, YY Li, L Tang, W Wu, HJ Xu - Tetrahedron letters, 2010 - Elsevier
We report a mild, convenient, environmentally friendly, and ligand-free synthetic protocol for
the cross-coupling reaction of aryl iodides and thiols using 10mol% CuI with KF/Al2O3 as …

Synthesis of Symmetrical and Unsymmetrical N,N′-Diaryl Guanidines via Copper/N-Methylglycine-Catalyzed Arylation of Guanidine Nitrate

H Xing, Y Zhang, Y Lai, Y Jiang… - The Journal of Organic …, 2012 - ACS Publications
CuI/N-methylglycine-catalyzed coupling reaction of guanidine nitrate with both aryl iodides
and bromides takes place at 70–100° C, affording symmetrical N, N′-diaryl guanidines with …

An unexpected reaction to methodology: an unprecedented approach to transamidation

KP Rakesh, AB Ramesha, CS Shantharam… - RSC …, 2016 - pubs.rsc.org
This report describes an unprecedented protocol for the synthesis of N, N′-substituted
ureas using a cross-coupling method. Mono substituted ureas were modified by an …