为芳基 CN 键合开辟道路 药物化学家喜欢将 N 键添加到芳环的 C 原子上以制造生物活性化合物。通过利用可见光中的能量,Romero 等人。建立这些联系并将 CH 转化为 CN 键。他们使用一种吸收蓝色的吖啶离子来激活一个环 C 以供传入的 N 伙伴使用。然后,硝酰基自由基助催化剂 (TEMPO) 对 H 原子向 O 的转移进行了编排。该反应适用于广泛的底物,包括作为 N 源的铵。科学,这个问题 p。1326 两种催化剂利用可见光和氧气形成药物研究中感兴趣的碳氮键基序。在过去的几十年里,有机金属交叉偶联化学已发展成为从预氧化起始材料组装复杂芳香族化合物的最可靠方法之一。最近,过渡金属催化的碳氢活化避免了对预氧化起始材料的需求,但这种方法因缺乏实用的胺化方案而受到限制。在这里,我们提出了通过光氧化还原催化进行芳香碳氢功能化的蓝图,并描述了该策略在芳烃胺化中的应用。一种基于有机光氧化还原的催
Photocatalytic C–H Amination of Aromatics Overcoming Redox Potential Limitations
作者:Tatsuya Morofuji、Gun Ikarashi、Naokazu Kano
DOI:10.1021/acs.orglett.0c00822
日期:2020.4.3
report the photocatalytic C–H amination of aromatics overcoming redox potential limitations. Radical cations of aromatic compounds are generated photocatalytically using Ru(phen)3(PF6)2, which has a reduction potential at a high oxidation state (Ered(RuIII/RuII) = +1.37 V vs SCE) lower than the oxidation potentials of aromatic substrates (Eox = +1.65 to +2.27 V vs SCE). The radical cations are trapped
我们报道了克服氧化还原潜在限制的芳香族化合物的光催化C–H胺化反应。使用Ru(phen)3(PF 6)2光催化生成芳香族化合物的自由基阳离子,该Ru(phen)3(PF 6)2在高氧化态下的还原电势(E red(Ru III / Ru II)= +1.37 V vs SCE)低于三氧化二砷。芳香族底物的氧化电位(E ox = +1.65至+2.27 V vs SCE)。自由基阳离子被吡啶捕获,得到N-芳基吡啶鎓离子,该离子被转化为芳族胺。
4-aryl-3-(heteroarylureido)quinoline derivatves
申请人:Pfizer Inc.
公开号:US05596001A1
公开(公告)日:1997-01-21
Compounds of the formula ##STR1## and the pharmaceutically acceptable salts thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, m, X and Q are as defined below, and novel intermediates used in the synthesis of such compounds. The compounds of formula I are inhibitors of acyl coenzyme A: cholesterol acyltransferase (ACAT) and are useful as hypolipidemic and natiatherosclerosis agents.
[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.
N-aryl and N-heteroarylamide and urea derivatives as inhibitors of acyl
申请人:Pfizer Inc.
公开号:US05656634A1
公开(公告)日:1997-08-12
Compounds of the formula ##STR1## the pharmaceutically acceptable salts thereof, wherein Q and R.sup.1 are as defined below, and novel carboxylic acid and acid halide intermediates used in the synthesis of such compounds. The compounds of formula I are inhibitors of acyl coenzyme A: cholesterol acyltransferase (ACAT) and are useful as hypolipidemic and antiatherosclerosis agents.
Intermediates for making N-aryl and N-heteroarylamide and urea
申请人:Pfizer Inc.
公开号:US05362878A1
公开(公告)日:1994-11-08
Compounds of the formula ##STR1## wherein R.sup.21 and R.sup.22 are as defined in the specification which are intermediates useful in the preparation of compounds of the formula ##STR2## and the pharmaceutically acceptable salts thereof, wherein Q and R.sup.1 are as defined in the specification. The compounds of formula I are inhibitors of acyl coenzyme A: cholesterol acyltransferase (ACAT) and are useful as hypolipidemic and antiatherosclerosis agents.