Direct, Metal-Free Amination of Heterocyclic Amides/Ureas with NH-Heterocycles and N-Substituted Anilines in POCl<sub>3</sub>
作者:Xiaohu Deng、Armin Roessler、Ivana Brdar、Roger Faessler、Jiejun Wu、Zachary S. Sales、Neelakandha S. Mani
DOI:10.1021/jo201425q
日期:2011.10.21
A POCl3-mediated, direct amination reaction of heterocyclicamides/ureas with NH-heterocycles or N-substituted anilines is described. Compared to the existing methods, this operationally simple protocol provides unique reactivity and functional group compatibility because of the metal-free, acidic reaction conditions. The yields are generally excellent.
[EN] PHOTOREDOX-CATALYZED DIRECT C-H FUNCTIONALIZATION OF ARENES<br/>[FR] FONCTIONNALISATION DIRECTE DE LA LIAISON C-H D'ARÈNES CATALYSÉE PAR UNE RÉACTION PHOTORÉDOX
申请人:UNIV NORTH CAROLINA CHAPEL HILL
公开号:WO2016196816A1
公开(公告)日:2016-12-08
The invention generally relates to methods of making substituted arenes via direct C-H amination. More specifically, methods of making para- and ortho-substituted arenes via direct C-H amination are disclosed. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
The 1H and 13C n.m.r. rules for the assignment of 1, 3- and 1, 5- disubstituted pyrazoles: a revision
作者:Marta Bruix、Javier De Mendoza、Jose Elguero
DOI:10.1016/s0040-4020(01)86908-8
日期:1987.1
The H-5 signal of N-substituted pyrazoles is not shifted to low field values on increasing solvent polarity when a nitrogen lone pair lies very close to the measured proton (H-bond). Typical examples of this “abnormal” behaviour are provided by C,N'-linked, pyrazole-containing heterocyclic dimers. On the contrary, models selected in the 1,1'-bipyrazole and 2,2'biindazole series (N,N'-linkage) showed
当氮孤对非常靠近测得的质子(氢键)时,随着溶剂极性的增加,N-取代的吡唑的H-5信号不会移至低场值。这种“异常”行为的典型例子是由C,N'连接的含吡唑的杂环二聚体提供的。相反,在1,1'-联吡唑和2,2'-联吲唑系列(N,N'-键)中选择的模型由于其在NN键周围的非共面构象而显示出正常的位移。为了分配双取代的吡唑,建议使用质子耦合的13 C nmr光谱作为替代方法。
Photoredox-catalyzed direct C—H functionalization of arenes
申请人:THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
公开号:US10399947B2
公开(公告)日:2019-09-03
The invention generally relates to methods of making substituted arenes via direct C—H amination. More specifically, methods of making para- and ortho-substituted arenes via direct C—H amination are disclosed. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
PHOTOREDOX-CATALYZED DIRECT C-H FUNCTIONALIZATION OF ARENES
申请人:THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
公开号:US20180148414A1
公开(公告)日:2018-05-31
The invention generally relates to methods of making substituted arenes via direct C—H amination. More specifically, methods of making para- and ortho-substituted arenes via direct C—H amination are disclosed. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.