846038-45-7Relevant academic research and scientific papers
IMIDAZOPIPERAZINONE INHIBITORS OF TRANSCRIPTION ACTIVATING PROTEINS
-
Paragraph 0624; 0625, (2019/10/20)
The present disclosure relates to heterocyclic compounds and methods which may be useful as inhibitors of transcription activating proteins such as CBP and P300 for the treatment or prevention of diseases such as proliferative diseases, inflammatory disorders, autoimmune diseases, and fibrotic diseases.
Hypervalent Iodine(III)-Mediated Regioselective Cyanation of Quinoline N-Oxides with Trimethylsilyl Cyanide
Xu, Feng,Li, Yuqin,Huang, Xin,Fang, Xinjie,Li, Zhuofei,Jiang, Hongshuo,Qiao, Jingyi,Chu, Wenyi,Sun, Zhizhong
supporting information, p. 520 - 525 (2018/12/13)
A regioselective cyanation of quinoline N-oxides with trimethylsilyl cyanide was developed by using (Diacetoxyiodo) benzene (PIDA) as mediated hypervalent iodine(III) reagent under metal-free and base-free reaction conditions to obtain 2-cyanoquinolines. The efficient PIDA reagent could play the role of an activator of the substrates and an accelerator of N?O bond cleavage. The reaction system featured a wide range of substrate suitability and high yields. The procedure was enlarged gram-scale to synthesize the tuberculosis (TB) inhibitor. Finally, according to some experimental results, a plausible mechanism for the cyanation reaction is proposed. (Figure presented.).
RhIII-Catalyzed Straightforward Synthesis of Benzophenanthroline and Benzophenanthrolinone Derivatives using Anthranils
Biswas, Aniruddha,Sarkar, Souradip,Samanta, Rajarshi
, p. 3000 - 3004 (2019/02/13)
An efficient pot-economic and step-economic RhIII-catalyzed site-selective direct amination/annulation strategy was developed for the synthesis of benzophenanthroline derivatives using quinoline N-oxides and anthranils. The method was further extended to the synthesis of nitrogen-containing extended π-conjugated benzophenanthrolinone derivatives. Late-stage functionalizations of cinchonidine and cinchophen derivatives and synthesis of a bioactive quinolino-indole were achieved.
4-Amino-7,8-dihydro-1,6-naphthyridin-5(6 H)-ones as Inhaled Phosphodiesterase Type 4 (PDE4) Inhibitors: Structural Biology and Structure-Activity Relationships
Roberts, Richard S.,Sevilla, Sara,Ferrer, Manel,Taltavull, Joan,Hernández, Bego?a,Segarra, Victor,Gràcia, Jordi,Lehner, Martin D.,Gavaldà, Amadeu,Andrés, Miriam,Cabedo, Judit,Vilella, Dolors,Eichhorn, Peter,Calama, Elena,Carcasona, Carla,Miralpeix, Montserrat
, p. 2472 - 2489 (2018/03/26)
Rational design of a novel template of naphthyridinones rapidly led to PDE4 inhibitors with subnanomolar enzymatic potencies. X-ray crystallography confirmed the binding mode of this novel template. We achieved compounds with double-digit picomolar enzymatic potencies through further structure-based design by targeting both the PDE4 enzyme metal-binding pocket and occupying the solvent-filled pocket. A strategy for lung retention and long duration of action based on low aqueous solubility was followed. In vivo efficacies were measured in a rat lung neutrophilia model by suspension microspray and dry powder administration. Suspension microspray of potent compounds showed in vivo efficacy with a clear dose-response. Despite sustained lung levels, dry powder administration performed much less well and without proper dose-response, highlighting clear differences between the two formulations. This indicates a deficiency in the low aqueous solubility strategy for long duration lung efficacy.
Synthesis of 2-Alkenylquinoline by Reductive Olefination of Quinoline N-Oxide under Metal-Free Conditions
Xia, Hong,Liu, Yuanhong,Zhao, Peng,Gou, Shaohua,Wang, Jun
supporting information, p. 1796 - 1799 (2016/05/19)
Synthesis of 2-alkenylquinoline by reductive olefination of quinoline N-oxide under metal-free conditions is disclosed. Practically, the reaction could be performed with quinoline as starting material via a one-pot, two-step process. A possible mechanism is proposed that involves a sequential 1,3-dipolar cycloaddition and acid-assisted ring opening followed by a dehydration process.
Metal-Free, Phosphonium Salt-Mediated Sulfoximination of Azine N-Oxides: Approach for the Synthesis of N-Azine Sulfoximines
Aithagani, Sravan Kumar,Kumar, Mukesh,Yadav, Mahipal,Vishwakarma, Ram A.,Singh, Parvinder Pal
, p. 5886 - 5894 (2016/07/23)
Herein, we report a simple and metal-free method for the synthesis of N-azine sulfoximines by the nucleophilic substitution of azine N-oxides with NH-sulfoximines. The present method works at room temperature with wide functional group compatibility and gives several unprecedented N-azine sulfoximines. The reaction conditions were also found suitable with enantiopure substrates and furnished products without any racemization. It also finds an application in the sulfoximination of azine-based functional molecules such as 2,2′-bipyridine, 1,10-phenanthroline, and quinine.
Copper-Catalyzed Regioselective Cascade Alkylation and Cyclocondensation of Quinoline N-Oxides with Diazo Esters: Direct Access to Conjugated π-Systems
Biswas, Aniruddha,Karmakar, Ujjwal,Pal, Arun,Samanta, Rajarshi
supporting information, p. 13826 - 13830 (2016/09/21)
An inexpensive copper-catalyzed cascade regioselective alkylation, followed by cyclocondensation of quinoline N-oxides with α-diazo esters has been achieved successfully to provide heteroarene-containing conjugated π-systems. The developed method is simple, straightforward, and economical with a broad range of substrate scope. The dual role of copper catalyst in the C?H bond functionalization and in Lewis acid-promoted cyclization was explored.
Regioselective Metal-Free Cross-Coupling of Quinoline N -Oxides with Boronic Acids
Bering, Luis,Antonchick, Andrey P.
supporting information, p. 3134 - 3137 (2015/06/30)
A novel and operationally simple one-step C-H bond functionalization of quinoline N-oxides to 2-substituted quinolines was developed. This approach enables the regioselective functionalization under external oxidant- and metal-free conditions. The developed transformation represents the first application of the Petasis reaction in functionalization of heterocycles.
Synthetic and mechanistic aspects of the regioselective base-mediated reaction of perfluoroalkyl- and perfluoroarylsilanes with heterocyclic N-oxides
Stephens, David E.,Chavez, Gabriel,Valdes, Martin,Dovalina, Monica,Arman, Hadi D.,Larionov, Oleg V.
supporting information, p. 6190 - 6199 (2014/08/05)
The scope and mechanistic implications of the direct transformation of heterocyclic N-oxides to 2-trifluoromethyl-, and related perfluoroalkyl- and perfluoroaryl-substituted N-heterocycles has been studied. The reaction is effected by perfluoroalkyl- and perfluorophenyltrimethylsilane in the presence of strong base. In situ displacement of the para-fluoro substituent in the pentafluorophenyl ring and the methoxy group in 8-methoxyquinolines with additional nucleophiles allows for further site-selective refunctionalization of the N-heterocyclic products. This journal is the Partner Organisations 2014.
Reversible frustrated lewis pair addition of n-heterocycles to unsaturated c-c bonds
Dornan, Peter K.,Longobardi, Lauren E.,Stephan, Douglas W.
supporting information, p. 1521 - 1524 (2014/07/08)
N-Heterocycle-tethered olefins and alkynes are cyclized by addition of the N-heterocycle and B(C6F5)3 across the unsaturation. This activation is demonstrated to be reversible at high temperatures. Georg Thieme Verlag Stuttgart New York.
