Copper-Mediated C–N Coupling of Arylsilanes with Nitrogen Nucleophiles
作者:Johannes Morstein、Eric D. Kalkman、Chen Cheng、John F. Hartwig
DOI:10.1021/acs.orglett.6b02543
日期:2016.10.21
A method for the oxidative coupling of arylsilanes with nitrogen nucleophiles is reported. This method occurs with a broad range of heptamethyltrisiloxylarenes and nitrogen nucleophiles, proceeds with the arylsilane as limiting reagent, and does not require a fluoride activator with electron-poor arylsilanes. The combination of this method with C–H silylation generates arylamines from unactivated arenes
Aryl and biaryl piperidines with MCH modulatory activity
申请人:PHARMACOPEIA, INC.
公开号:US20030013720A1
公开(公告)日:2003-01-16
In one embodiment, this invention provides a novel class of compounds as antagonists of the MCH receptor, methods of preparing such compounds, pharmaceutical compositions containing one or more of the compounds, methods of preparing pharmaceutical formulations comprising one or more such compounds, and methods of treatment, prevention or amelioration or one or more of diseases associated with the MCH receptor. An illustrative inventive compound is shown below:
1
<i>o</i>-Iodoxybenzoic Acid Mediated<i>N</i>-Arylation of Aromatic Amines by Using Arylhydrazines as the Arylating Counterpart
作者:Ravindra R. Jadhav、Sameerana N. Huddar、Krishnacharya G. Akamanchi
DOI:10.1002/ejoc.201300917
日期:2013.10
the combination of arylhydrazines with o-iodoxybenzoicacid (IBX) for the generation of aryl free radicals. On the basis of this finding, a method was developed for the N-arylation of aromaticamines under mild conditions (base-free, –5 °C) by usingarylhydrazines as the arylatingcounterpart and arylamines. The scope of this method was demonstrated by using a number of arylhydrazines and arylamines,
Diacylpiperazines of general structure ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, and asthma, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
‐1,1’‐biaryls. Various 9‐(arylamino)aryl‐9H‐carbazoles could be synthesized from aryl(haloaryl)amines and 9H‐carbazole derivatives in high yields by the use of tBu‐XPhos. The amination of 4‐bromotoluene with a mixture of diphenylamine and 9H‐carbazole gave only 9‐o‐tolyl‐9H‐carbazole with tBu‐XPhos, while the use of PtBu3 or XPhos afforded the mixture of 9‐o‐tolyl‐9H‐carbazole and diphenyl(o‐tolyl)amine
研究了钯与9 H-咔唑衍生物的芳基(卤代芳基)胺的胺化反应。在使用Pd 2(dba)3 / P t Bu 3 / NaO t Bu催化剂与9 H-咔唑胺化(4-溴苯基)苯胺中,主要产物为9- [4-(苯基氨基)苯基] -9 H-咔唑,收率60%,其中(4-溴苯基)苯胺转化率> 99%,并伴随形成9- [4- [苯基[4- [苯基[4-(苯基氨基)苯基]氨基]苯基] -9 H观察到连续产生的副产物咔唑(产率为15%)。使用XPhos代替P t Bu 3时,以81%的收率提供所需的产品,并将连续的副产品抑制到7.7%。通过使用t Bu‐XPhos ,所需产品的收率达到98%。用其他2-二叔丁基或2-二(1-金刚烷基)膦基-1,1'-联芳基也获得了如此优异的所需产品收率。可以通过使用t Bu-XPhos从芳基(卤代芳基)胺和9 H-咔唑衍生物高产率合成各种9-(芳基氨基)芳基-9 H-咔唑。用二苯胺和9