- From alcohol to 1,2,3-triazole: Via a multi-step continuous-flow synthesis of a rufinamide precursor
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Rufinamide is an antiepileptic drug used to treat the Lennox-Gastaut syndrome. It comprises a relatively simple molecular structure. Rufinamide can be synthesized from an organohalide in three steps. Recently we have shown that microreactor flow networks have better sustainability profiles in terms of life-cycle assessment than the respective consecutive processing in a batch. The analysis was based on the results of a single step conversion from batch to continuous mode. An uninterrupted continuous process towards rufinamide was developed, starting from an alcohol precursor, which is converted to the corresponding chloride with hydrogen chloride gas. The chloride is then converted to the corresponding organoazide that yields the rufinamide precursor via cycloaddition to the greenest and cheapest dipolarophile available on the market. The current process demonstrates chemical and process-design intensification aspects encompassed by novel process windows. Single reaction steps are chemically intensified via a wide range of conditions available in a microreactor environment. Meanwhile, the connection of reaction steps and separations results in process-design intensification. With two in-line separations the process consists of five stages resulting in a total yield of 82% and productivity of 9 g h-1 (11.5 mol h-1 L-1). The process minimizes the isolation and handling of strong alkylating or energetic intermediates, while minimizing water and organic solvent consumption.
- Borukhova, Svetlana,No?l, Timothy,Metten, Bert,De Vos, Eric,Hessel, Volker
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Read Online
- Novel hederagenin-triazolyl derivatives as potential anti-cancer agents
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A series of novel aryl-1H-1,2,3-triazol-4-yl methylester and amide derivatives of the natural product hederagenin was synthesized aiming to develop new antitumor agents, using Huisgen 1,3-dipolar cycloaddition reactions, with yields between 35% and 95%. T
- Rodríguez-Hernández, Diego,Demuner, Antonio J.,Barbosa, Luiz C.A.,Heller, Lucie,Csuk, René
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Read Online
- Hydrogen Bond Directed Photocatalytic Hydrodefluorination and Methods of Use Thereof
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Methods of synthesizing compounds comprising fluorinated aryl groups are disclosed, wherein said methods utilize hydrogen bond directed photocatalytic hydrodefluorination.
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- Design and synthesis of C-ring quinoxaline-substituted sinomenine 1,2,3-triazole derivatives via click reactions
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The synthesis of C-ring quinoxaline-substituted sinomenine 1,2,3-triazole derivatives at the 4-OH via click reactions is accomplished, and a total of 16 novel sinomenine double N-heterocyclic derivatives are obtained in 74%–95% yields. The C-ring is first transformed into a 1,2-diketone structure under the action of hydrochloric acid, and then reacted with o-phenylenediamine to obtain a C-ring quinoxaline-substituted structure. The 4-OH of sinomenine reacts with chloropropyne to give an alkynyl sinomenine, and then reacts with sodium azide and various benzyl chlorides to give the target compounds. All the synthesized derivatives are characterized by Fourier-transform infrared spectrometry, high resolution mass spectrometry, 1H NMR, and 13C NMR spectroscopy.
- Chen, Xia,Dong, Ling,Gu, Chengwen,Jin, Jie,Lu, Tong,Pan, Hongmei,Tao, Naili,Wang, Ao,Wu, Xuedan,Zhang, Kehua
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p. 699 - 704
(2020/06/03)
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- Chemo- And regioselective click reactions through nickel-catalyzed azide-alkyne cycloaddition
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Metal-catalyzed cycloaddition is an expeditious synthetic route to functionalized heterocyclic frameworks. However, achieving reactivity-controlled metal-catalyzed azide-alkyne cycloadditions from competing internal alkynes has been challenging. Herein, we report a nickel-catalyzed [3 + 2] cycloaddition of unsymmetrical alkynes with organic azides to afford functionalized 1,2,3-triazoles with excellent regio- and chemoselectivity control. Terminal alkynes and cyanoalkynes afford 1,5-disubstituted triazoles and 1,4,5-trisubstituted triazoles bearing a 4-cyano substituent, respectively. Thioalkynes and ynamides exhibit inverse regioselectivity compared with terminal alkynes and cyanoalkynes, affording 1,4,5-trisubstituted triazoles with 5-thiol and 5-amide substituents, respectively. Density functional theory calculations are performed for the elucidation of the reaction mechanism. The computed mechanism suggests that a nickellacyclopropene intermediate is generated by the oxidative addition of the alkyne substrate to the Ni(0)-Xantphos catalyst, and the subsequent C-N coupling of this intermediate with an azide is responsible for the chemo- and regioselectivity.
- Baek, Seung-Yeol,Baik, Mu-Hyun,Choe, Wonyoung,Hong, Sung You,Jeon, Ji Hwan,Jeong, Seo Yeong,Kim, Woo Gyum,Nam, Dongsik
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supporting information
p. 3374 - 3381
(2020/05/14)
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- Carcarinic acid-1, 2, 3- based triazole compound as well as preparation method and application thereof (by machine translation)
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The method comprises the following steps: firstly 1, 2, 3 - oxidizing and opening the carbon- carbon double bond of the, carcarinic acid into methylene to, obtain carcarinic acid (not shown, in the technical field of, organic 3 - synthesis), Wolf - Kishner - 1, 2, 3 - 1, 2, 3 - 1, 2, 3 - 3 . (by machine translation)
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Paragraph 0100-0102
(2019/12/25)
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- Highly regioselective and sustainable solar click reaction: A new post-synthetic modified triazole organic polymer as a recyclable photocatalyst for regioselective azide-alkyne cycloaddition reaction
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The synthesis of pharmaceutically active 1,2,3-triazoles has been continuously scrutinized in the search for unique and effective catalysts to make the process efficient, green, and sustainable. Here, we are presenting a new visible light active Ni(ii) cyclam-integrated triazole-linked organic polymer (Ni-TLOP) photocatalyst for the synthesis of 1,2,3-triazole compounds with excellent efficiency and regioselectivity. The reaction was studied for a series of substrates and the absolute regioselectivity of a representative triazole product has also been confirmed by X-ray crystallography. The proficiency and chemical orthogonality of the Ni-TLOP are remarkable and it shows enhanced efficiency and regioselectivity. The use of a recyclable photocatalyst and non-hazardous reagents makes the catalytic system sustainable and environmentally friendly. This photocatalyzed click reaction technique has been successfully applied to the expedient synthesis of one of the most sold anti-epileptic drugs rufinamide.
- Yadav, Dolly,Singh, Nem,Kim, Tae Wu,Kim, Jae Young,Park, No-Joong,Baeg, Jin-Ook
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supporting information
p. 2677 - 2685
(2019/06/13)
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- Organic synthesis in a modular robotic system driven by a chemical programming language
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The synthesis of complex organic compounds is largely a manual process that is often incompletely documented. To address these shortcomings, we developed an abstraction that maps commonly reported methodological instructions into discrete steps amenable to automation. These unit operations were implemented in a modular robotic platform by using a chemical programming language that formalizes and controls the assembly of the molecules. We validated the concept by directing the automated system to synthesize three pharmaceutical compounds, diphenhydramine hydrochloride, rufinamide, and sildenafil, without any human intervention. Yields and purities of products and intermediates were comparable to or better than those achieved manually. The syntheses are captured as digital code that can be published, versioned, and transferred flexibly between platforms with no modification, thereby greatly enhancing reproducibility and reliable access to complex molecules.
- Steiner, Sebastian,Wolf, Jakob,Glatzel, Stefan,Andreou, Anna,Granda, Jaros?aw M.,Keenan, Graham,Hinkley, Trevor,Aragon-Camarasa, Gerardo,Kitson, Philip J.,Angelone, Davide,Cronin, Leroy
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- Palladium-Catalyzed Aminocarbonylation Reaction to Access 1,2,3-Triazole-5-carboxamides Using Dimethyl Carbonate as Sustainable Solvent
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A simple and direct palladium-catalyzed aminocarbonylation of 5-iodo-1,2,3-triazoles backbone for the incorporation of an amide functional group is presented. The approach is based on the palladium catalyzed carbonylative coupling reaction of iodo-triazole with different amines employing formic acid and sulfuric acid as CO source (Morgan's reaction) to provide the 1,2,3-triazole-5-carboxamides in good to excellent yields. The important features of this methodology include short reaction time, high yields, the use of dimethyl carbonate as a sustainable solvent, and the use of efficient alternative source of carbon monoxide, avoiding pressurized cylinder. The methodology described herein for the synthesis of 1,4,5-trisubstituted 1,2,3-triazole-5-carboxamides, can offers an alternative path for functionalization of other heterocycles.
- de Albuquerque, Danilo Yano,de Moraes, Juliana R.,Schwab, Ricardo S.
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supporting information
p. 6673 - 6681
(2019/11/02)
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- Advanced Continuous Flow Platform for On-Demand Pharmaceutical Manufacturing
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As a demonstration of an alternative to the challenges faced with batch pharmaceutical manufacturing including the large production footprint and lengthy time-scale, we previously reported a refrigerator-sized continuous flow system for the on-demand production of essential medicines. Building on this technology, herein we report a second-generation, reconfigurable and 25 % smaller (by volume) continuous flow pharmaceutical manufacturing platform featuring advances in reaction and purification equipment. Consisting of two compact [0.7 (L)×0.5 (D)×1.3 m (H)] stand-alone units for synthesis and purification/formulation processes, the capabilities of this automated system are demonstrated with the synthesis of nicardipine hydrochloride and the production of concentrated liquid doses of ciprofloxacin hydrochloride, neostigmine methylsulfate and rufinamide that meet US Pharmacopeia standards.
- Zhang, Ping,Weeranoppanant, Nopphon,Thomas, Dale A.,Tahara, Kohei,Stelzer, Torsten,Russell, Mary Grace,O'Mahony, Marcus,Myerson, Allan S.,Lin, Hongkun,Kelly, Liam P.,Jensen, Klavs F.,Jamison, Timothy F.,Dai, Chunhui,Cui, Yuqing,Briggs, Naomi,Beingessner, Rachel L.,Adamo, Andrea
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p. 2776 - 2784
(2018/02/06)
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- Derisking the Cu-Mediated 18F-Fluorination of Heterocyclic Positron Emission Tomography Radioligands
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Molecules labeled with fluorine-18 (18F) are used in positron emission tomography to visualize, characterize and measure biological processes in the body. Despite recent advances in the incorporation of 18F onto arenes, the development of general and efficient approaches to label radioligands necessary for drug discovery programs remains a significant task. This full account describes a derisking approach toward the radiosynthesis of heterocyclic positron emission tomography (PET) radioligands using the copper-mediated 18F-fluorination of aryl boron reagents with 18F-fluoride as a model reaction. This approach is based on a study examining how the presence of heterocycles commonly used in drug development affects the efficiency of 18F-fluorination for a representative aryl boron reagent, and on the labeling of more than 50 (hetero)aryl boronic esters. This set of data allows for the application of this derisking strategy to the successful radiosynthesis of seven structurally complex pharmaceutically relevant heterocycle-containing molecules.
- Taylor, Nicholas J.,Emer, Enrico,Preshlock, Sean,Schedler, Michael,Tredwell, Matthew,Verhoog, Stefan,Mercier, Joel,Genicot, Christophe,Gouverneur, Véronique
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supporting information
p. 8267 - 8276
(2017/06/27)
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- Hemilability-Driven Water Activation: A NiII Catalyst for Base-Free Hydration of Nitriles to Amides
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The NiII complex 1 containing pyridyl- and hydroxy-functionalized N-heterocyclic carbenes (NHCs) is synthesized and its catalytic utility for the selective nitrile hydration to the corresponding amide under base-free conditions is evaluated. The title compound exploits a hemilabile pyridyl unit to interact with a catalytically relevant water molecule through hydrogen-bonding and promotes a nucleophilic water attack to the nitrile. A wide variety of nitriles is hydrated to the corresponding amides including the pharmaceutical drugs rufinamide, Rifater, and piracetam. Synthetically challenging α-hydroxyamides are accessed from cyanohydrins under neutral conditions. Related catalysts that lack the pyridyl unit (i.e., compounds 2 and 4) are not active whereas those containing both the pyridyl and the hydroxy or only the pyridyl pendant (i.e., compounds 1 and 3) show substantial activity. The linkage isomer 1′ where the hydroxy group is bound to the metal instead of the pyridyl group was isolated under different crystallization conditions insinuating a ligand hemilabile behavior. Additional pKa measurements reveal an accessible pyridyl unit under the catalytic conditions. Kinetic studies support a ligand-promoted nucleophilic water addition to a metal-bound nitrile group. This work reports a Ni-based catalyst that exhibits functional hemilability for hydration chemistry.
- Singh, Kuldeep,Sarbajna, Abir,Dutta, Indranil,Pandey, Pragati,Bera, Jitendra K.
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supporting information
p. 7761 - 7771
(2017/06/06)
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- SUBSTITUTED TRIAZOLES AND METHODS RELATING THERETO
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Substituted 1,2,3-triazole compounds are disclosed which have utility in the treatment of a variety of neurological disorders. The compounds provided herein have the general structure wherein R1, R2, R3 and n are as defined herein, including stereoisomers, esters, solvates and pharmaceutically acceptable salts thereof. Also disclosed are compositions containing a compound provided herein in combination with a pharmaceutically acceptable carrier, as well as methods relating to the use thereof for treating neurological disorders in a subject in need thereof.
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Paragraph 33
(2016/08/23)
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- Discovery of 7-Methyl-10-Hydroxyhomocamptothecins with 1,2,3-Triazole Moiety as Potent Topoisomerase I Inhibitors
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Homocamptothecin is emerging as an important topoisomerase I inhibitor originating in natural product camptothecin. We report the modifications and SAR of homocamptothecin on position C10 to develop potent topoisomerase I inhibitors for anticancer drug di
- Xu, Xiguo,Wu, Yuelin,Liu, Wenfeng,Sheng, Chuanquan,Yao, Jianzhong,Dong, Guoqiang,Fang, Kun,Li, Jin,Yu, Zhiliang,Min, Xiao,Zhang, Huojun,Miao, Zhenyuan,Zhang, Wannian
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p. 398 - 403
(2016/10/19)
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- Benzylic C-H Azidation Using the Zhdankin Reagent and a Copper Photoredox Catalyst
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An azidation method for C-N bond formation at benzylic C-H positions is described using copper-catalyzed visible light photochemistry and the Zhdankin azidoiodinane reagent. The method is applicable to a wide range of substrates bearing different functional groups and having a primary, secondary, or tertiary benzylic position, and is thought to proceed through a radical chain reaction.
- Rabet, Pauline T. G.,Fumagalli, Gabriele,Boyd, Scott,Greaney, Michael F.
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supporting information
p. 1646 - 1649
(2016/04/26)
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- New solventless and metal-free synthesis of the antiepileptic drug 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxamide (Rufinamide) and analogues
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This work presents a new synthesis of the antiepileptic drug rufinamide - 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxamide) in chemical form - and some analogue compounds, through a one-pot reaction employing a solventless, metal-free catalysis and without any reducing reagent. The great novelty presented is the synthesis of 4-trichloroacetyl-1-(2,6-difluorobenzyl/benzyl/4-methoxybenzyl)-5-methyl(phenyl)-1H-1,2,3-triazoles as new precursors from a regioselective 1,3-dipolar cycloaddition reaction between 1,1,1-trichloro-4-alkoxyalk-3-en-2-ones and some benzyl azides, which are converted into rufinamide and the analogues by an addition-elimination reaction with an aqueous solution of NH4OH in good yields (42-52%).
- Bonacorso, Helio G.,Moraes, Maiara C.,Luz, Fábio M.,Quintana, Pedro S.,Zanatta, Nilo,Martins, Marcos A.P.
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p. 441 - 444
(2015/04/27)
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- O-(triazolyl)methyl carbamates as a novel and potent class of Fatty Acid Amide Hydrolase (FAAH) inhibitors
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Inhibition of fatty acid amide hydrolase (FAAH) activity is under investigation as a valuable strategy for the treatment of several disorders, including pain and drug addiction. A number of potent FAAH inhibitors belonging to different chemical classes have been disclosed to date; O-aryl carbamates are one of the most representative families. In the search for novel FAAH inhibitors, a series of O-(1,2,3-triazol-4-yl)methyl carbamate derivatives were designed and synthesized exploiting a coppercatalyzed [3+2] cycloaddition reaction between azides and alkynes (click chemistry). Exploration of the structure-activity relationships within this new class of compounds identified potent inhibitors of both rat and human FAAH with IC50 values in the single-digit nanomolar range. In addition, these derivatives showed improved stability in rat plasma and kinetic solubility in buffer with respect to the lead compound. Based on the results of the study, the novel analogues identified can be considered to be promising starting point for the development of new FAAH inhibitors with improved drug-like properties.
- Colombano, Giampiero,Albani, Clara,Ottonello, Giuliana,Ribeiro, Alison,Scarpelli, Rita,Tarozzo, Glauco,Daglian, Jennifer,Jung, Kwang-Mook,Piomelli, Daniele,Bandiera, Tiziano
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supporting information
p. 380 - 395
(2015/02/05)
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- A PROCESS FOR THE PREPARATION OF RUFINAMIDE AND INTERMEDIATES THEREOF
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Provided are processes for the preparation of rutinamide and compounds which are intermediate compounds used in the processes for the preparation of rutinamide. Rutinamide is an anticonvulsant drug that is used in combination with other antiepileptic medicaments for the treatment of a rare form of epilepsy, Lennox-Gastaut syndrome. Formula (I)
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Page/Page column 17
(2014/08/20)
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- PROCESS FOR PREPARATION OF 1,2,3-TRIAZOLE-4 CARBOXAMIDES
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The invention relates to the preparation of 1,2,3-triazole-4-carboxamide of general Formula I: wherein R1 and R2 may be the same or different and are selected from H, F, Cl, Br, I, OR, C(O)R, NH2, NHR or NR2. R can be a linear or branched alkyl group, for example a C1-C4 alkyl group. In exemplary embodiments, R1 and R2 are independently selected from H, F, Cl, Br, and I. The compound of Formula I can be Rufinamide.
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Paragraph 0059
(2014/06/23)
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- A PROCESS FOR PREPARING TRIAZOLE COMPOUNDS
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The present invention relates to process for preparing triazole compounds used in the treatment of epilepsy. The process comprises of reacting compound of 2, 6 difluoroazide (II) with 2, 3 dihalo compound (III) to form compound of formula I, which on further treatment with an aminating agent gives Rufinamide (IV). 2, 6 difluoroazide (II) is reacted with 2, 3 dihalo compound (III) in the presence of a solvent. The reaction can be carried out in a single pot without isolation of intermediates.
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Page/Page column 16
(2014/05/24)
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- Continuous flow total synthesis of rufinamide
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Small molecules bearing 1,2,3-triazole functionalities are important intermediates and pharmaceuticals. Common methods to access the triazole moiety generally require the generation and isolation of organic azide intermediates. Continuous flow synthesis provides the opportunity to synthesize and consume the energetic organoazides, without accumulation thereof. In this report, we described a continuous synthesis of the antiseizure medication rufinamide. This route is convergent and features copper tubing reactor-catalyzed cycloaddition reaction. Each of the three chemical steps enjoys significant benefits and has several advantages by being conducted in flow. The total average residence time of the synthesis is approximately 11 min, and rufinamide is obtained in 92% overall yield.
- Zhang, Ping,Russell, M. Grace,Jamison, Timothy F.
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p. 1567 - 1570
(2015/02/19)
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- Safe and highly efficient syntheses of triazole drugs using Cu2O nanoparticle in aqueous solutions
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Triazole moiety is frequently employed in drug discovery and optimization. However, most syntheses of triazole drugs involve isolation of highly explosive azides. Herein we report safe and high efficient syntheses of triazole drugs in aqueous/organic solvent systems with Cu2O nanoparticle (Cu 2O-NP) as the catalyst of azide-alkyne cycloaddition (CuAAC). Since Cu2O-NP can be efficiently dispensed in aqueous and some organic solvents, the azide solutions from the previous preparation could be used directly in the next CuAAC stage without isolation. Therefore, this synthetic strategy is safe, convenient, and high yielding for the syntheses of triazole drugs.
- Wang, Jing-Han,Pan, Cheng-Wen,Li, Yong-Tao,Meng, Fan-Fei,Zhou, Hong-Gang,Yang, Cheng,Zhang, Quan,Bai, Cui-Gai,Chen, Yue
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p. 3406 - 3409
(2013/07/19)
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- PROCESS FOR PREPARATION OF RUFINAMIDE
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The invention relates to a novel, industrially viable, cost effective process for the preparation of 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxamide commonly known as Rufinamide and intermediates thereof.
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Paragraph 0028
(2013/07/25)
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- Facet-dependent catalytic activity of Cu2O nanocrystals in the one-pot synthesis of 1,2,3-triazoles by multicomponent click reactions
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We report the highly facet-dependent catalytic activity of Cu2O nanocubes, octahedra, and rhombic dodecahedra for the multicomponent direct synthesis of 1,2,3-triazoles from the reaction of alkynes, organic halides, and NaN3. The catalytic activities of clean surfactant-removed Cu 2O nanocrystals with the same total surface area were compared. Rhombic dodecahedral Cu2O nanocrystals bounded by {110} facets were much more catalytically active than Cu2O octahedra exposing {111} facets, whereas Cu2O nanocubes displayed the slowest catalytic activity. The superior catalytic activity of Cu2O rhombic dodecahedra is attributed to the fully exposed surface Cu atoms on the {110} facet. A large series of 1,4-disubstituted 1,2,3-triazoles have been synthesized in excellent yields with high regioselectivity under green conditions by using these rhombic dodecahedral Cu2O catalysts, including the synthesis of rufinamide, an antiepileptic drug, demonstrating the potential of these nanocrystals as promising heterogeneous catalysts for other important coupling reactions.
- Chanda, Kaushik,Rej, Sourav,Huang, Michael H.
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p. 16036 - 16043
(2014/04/03)
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- IMPROVED PROCESS FOR THE PREPARATION OF RUFINAMIDE
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The invention relates to a novel, industrially viable, cost effective process for the preparation of 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxamide commonly known as Rufinamide and intermediates thereof.
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Page/Page column 9
(2012/03/26)
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- IMPROVED PROCESS FOR PREPARING RUFINAMIDE INTERMEDIATE
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The present invention refers to an improved method for the preparation of compound 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylic acid substantially free of its 3H-I isomer. The invention also refers to the use of said intermediate for the preparation of Rufinamide and for obtaining a new polymorphic form of Rufinamide, designed as Form R-5. The invention also refers to said new polymorph of Rufinamide, and to the composition containing it and its use as medicament. The new polymorph of Rufinamide shows good stability and appropriate physico-chemical properties for its manipulation on industrial scale. Polymorph Form R-5 will be suitable to use as pharmaceutical for the treatment of convulsions, especially for the treatment of epilepsy.
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Page/Page column 17
(2011/11/13)
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- Novel purine-based fluoroaryl-1,2,3-triazoles as neuroprotecting agents: Synthesis, neuronal cell culture investigations, and CDK5 docking studies
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A series of novel purine-based fluoroaryl triazoles were synthesized using the Cu(I) catalyzed 1,3-dipolar cycloaddition reactions (click reactions), and assayed for their neuroprotective effects using fluorescence electron microscopy. Among these triazoles, o-fluorophenylmetyl-triazole, 7, has comparable neuroprotective effect as that of Flavopiridol (1) and Roscovitine (2), the state of the art CDK inhibitors, against the Aβ induced neurotoxicity. These results are substantiated using computer docking methods (DarwinDock/GenDock), which predict that Roscovitine and the triazole 7 bind to the ATP-binding site of CDK5/p25 with comparable binding energies, whereas the corresponding pentafluorophenylmethyl-triazole, 9, has dramatically reduced binding energy (in accordance with its lack of neuroprotection). These combined experimental and theoretical studies support the involvement of CDK5/p25 in the neuronal cell cycle re-entry.
- Nair, Nanditha,Kudo, Wataru,Smith, Mark A.,Abrol, Ravinder,Goddard III, William A.,Reddy, V. Prakash
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supporting information; experimental part
p. 3957 - 3961
(2011/08/06)
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- METHOD FOR THE PREPARATION OF RUFINAMIDE
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The invention provides a novel process for the regioselective preparation of a compound of formula (I)
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Page/Page column 3
(2010/09/18)
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- Process for the preparation of rufinamide
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The invention provides a novel process for the regioselective preparation of a compound of formula (I)
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Page/Page column 5
(2010/10/03)
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- PROCESS FOR THE PREPARATION OF RUFINAMIDE
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The present invention relates to a process for the preparation of rufinamide of formula (I), which process comprises: (i) reacting a 2,6-difluorobenzylhaIide of formula (II), wherein X is chloride, bromide or iodide, with an azide to obtain 2-(azidomethyl)-1,3- difluorobenzene of formula (III); (ii) reacting 2-(azidomethyl)-1,3-difluorobenzene of formula (III) with methyl propiolate to obtain methyl 1-(2,6-difluorobenzyl)-1 H-1,2,3- triazole-4-carboxylic acid of formula (IV); and (iii) reacting methyl 1-(2,6-difluorobenzyl)- 1 H-1,2,3-triazole-4-carboxylic acid of formula (IV) with ammonia to obtain rufinamide of formula (I).
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Page/Page column 13
(2010/04/30)
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- Aralkyltriazole compounds
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1-phenyl-lower alkyl-1H-1,2,3-triazole compounds of the formula STR1 in which Ph represents phenyl substituted by up to and including 3 substituents selected from lower alkyl, halogen and trifluoromethyl, alk represents lower alkylidene, and wherein either R1 represents hydrogen, lower alkyl, lower alkoxy, amino, N-lower alkylamino, N,N-di-lower alkylamino, N-lower alkanoylamino, carbamoyl, N-lower alkanoylcarbamoyl, N-lower alkylcarbamoyl or N,N-di-lower alkylcarbamoyl and R2 represents carbamoyl, N-lower alkanoylcarbamoyl, N-lower alkylcarbamoyl or N,N-di-lower alkylcarbamoyl or R1 represents carbamoyl, N-lower alkanoylcarbamoyl, N-lower alkylcarbamoyl or N,N-di-lower alkylcarbamoyl and R2 represents hydrogen or lower alkyl, have anti-convulsive properties and can be used as medicaments.
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