يعرض 1 - 10 نتائج من 49 نتيجة بحث عن '"R, Roose"', وقت الاستعلام: 1.05s تنقيح النتائج
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    دورية أكاديمية

    المصدر: Molecules; Volume 25; Issue 21; Pages: 4906

    مصطلحات موضوعية: isocyanides, palladium, insertion reactions, heterocycles, catalysis

    جغرافية الموضوع: agris

    الوصف: Isocyanides have long been known as versatile chemical reagents in organic synthesis. Their ambivalent nature also allows them to function as a CO-substitute in palladium-catalyzed cross couplings. Over the past decades, isocyanides have emerged as practical and versatile C1 building blocks, whose inherent N-substitution allows for the rapid incorporation of nitrogeneous fragments in a wide variety of products. Recent developments in palladium catalyzed isocyanide insertion reactions have significantly expanded the scope and applicability of these imidoylative cross-couplings. This review highlights the advances made in this field over the past eight years.

    وصف الملف: application/pdf

    العلاقة: Organic Chemistry; https://dx.doi.org/10.3390/molecules25214906Test

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    المساهمون: AMIBM, RS: FSE AMIBM, Organic Chemistry, AIMMS, Theoretical Chemistry, Chemistry and Pharmaceutical Sciences

    المصدر: Chemistry: a European journal. Wiley-VCH Verlag
    Chemistry-A European Journal, 29(9):e202203074. Wiley-VCH Verlag
    Chemistry: a European journal
    Roose, T R, Preschel, H D, Mayo Tejedor, H, Roozee, J C, Hamlin, T A, Maes, B U W, Ruijter, E & Orru, R V A 2023, ' Iron-Catalysed Carbene Transfer to Isocyanides as a Platform for Heterocycle Synthesis ', Chemistry-A European Journal, vol. 29, no. 9, e202203074 . https://doi.org/10.1002/chem.202203074Test

    الوصف: An iron-catalysed carbene transfer reaction of diazo compounds to isocyanides has been developed. The resulting ketenimines are trapped in situ with various bisnucleophiles to access a range of densely functionalized heterocycles (pyrimidinones, dihydropyrazolones, 1H-tetrazoles) in a one-pot process. The electron-rich Hieber anion ([Fe(CO) 3NO] −) facilitates efficient catalytic carbene transfer from acceptor-type α-diazo carbonyl compounds to isocyanides, providing a cost-efficient and benign alternative to similar noble metal-catalysed processes. Based on DFT calculations a plausible reaction mechanism for activation of the α-diazo carbonyl carbene precursor and ketenimine formation is provided.

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    دورية أكاديمية

    المصدر: Energies, Vol 8, Iss 6, Pp 5217-5233 (2015)

    الوصف: As the world moves toward greenhouse gas reduction, there is increasingly active work around Li-ion chemistry-based batteries as an energy source for electric vehicles (EVs), hybrid electric vehicles (HEVs) and smart grids. In these applications, the battery management system (BMS) requires an accurate online estimation of the state of charge (SOC) in a battery pack. This estimation is difficult, especially after substantial battery aging. In order to address this problem, this paper utilizes SOC estimation of Li-ion battery packs using a fuzzy-improved extended Kalman filter (fuzzy-IEKF) for Li-ion cells, regardless of their age. The proposed approach introduces a fuzzy method with a new class and associated membership function that determines an approximate initial value applied to SOC estimation. Subsequently, the EKF method is used by considering the single unit model for the battery pack to estimate the SOC for following periods of battery use. This approach uses an adaptive model algorithm to update the model for each single cell in the battery pack. To verify the accuracy of the estimation method, tests are done on a LiFePO4 aged battery pack consisting of 120 cells connected in series with a nominal voltage of 432 V.

    وصف الملف: electronic resource

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    المصدر: Roose, T R, Verdoorn, D S, Mampuys, P, Ruijter, E, Maes, B U W & Orru, R V A 2022, ' Transition metal-catalysed carbene-and nitrene transfer to carbon monoxide and isocyanides ', Chemical Society Reviews, vol. 51, no. 14, pp. 5842-5877 . https://doi.org/10.1039/d1cs00305dTest
    Chemical Society reviews

    الوصف: Transition metal-catalysed carbene- and nitrene transfer to the C1-building blocks carbon monoxide and isocyanides provides heteroallenes (i.e. ketenes, isocyanates, ketenimines and carbodiimides). These are versatile and reactive compounds allowing in situ transformation towards numerous functional groups and organic compounds, including heterocycles. Both one-pot and tandem processes have been developed providing valuable synthetic methods for the organic chemistry toolbox. This review discusses all known transition metal-catalysed carbene- and nitrene transfer reactions towards carbon monoxide and isocyanides and in situ transformation of the heteroallenes hereby obtained, with a special focus on the general mechanistic considerations.

    وصف الملف: application/pdf

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    المساهمون: AIMMS, Organic Chemistry

    المصدر: Organic Letters
    Organic letters, 22(3), 914-919. American Chemical Society
    Organic letters
    Collet, J W, Morel, B, Lin, H C, Roose, T R, Mampuys, P, Orru, R V A, Ruijter, E & Maes, B U W 2020, ' Synthesis of Densely Functionalized Pyrimidouracils by Nickel(II)-Catalyzed Isocyanide Insertion ', Organic letters, vol. 22, no. 3, pp. 914-919 . https://doi.org/10.1021/acs.orglett.9b04387Test

    الوصف: A robust nickel-catalyzed oxidative isocyanide insertion/C-H amination by reaction of readily available N-uracil-amidines with isocyanides affording polysubstituted pyrimidouracils has been reported. The reaction proceeds in moderate to quantitative yield, under mild conditions (i.e., green solvent, air atmosphere, moderate temperature). The broad range of structurally diverse isocyanides and N-uracil-amidines that are tolerated make this method an interesting alternative to the currently available procedures toward pyrimidouracils.

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    المصدر: Collet, J W, Roose, T R, Ruijter, E, Maes, B U W & Orru, R V A 2020, ' Base Metal Catalyzed Isocyanide Insertions ', Angewandte Chemie. International Edition, vol. 59, no. 2, pp. 540-558 . https://doi.org/10.1002/anie.201905838Test
    Angewandte Chemie: international edition in English

    الوصف: Isocyanides are diverse C1 building blocks considering their potential to react with nucleophiles, electrophiles, and radicals. Therefore, perhaps not surprisingly, isocyanides are highly valuable as inputs for multicomponent reactions (MCRs) and other one-pot cascade processes. In the field of organometallic chemistry, isocyanides typically serve as ligands for transition metals. The coordination of isocyanides to metal centers alters the electronic distribution of the isocyano moiety, and reaction pathways can therefore be accessed that are not possible in the absence of the metal. The tunable reactivity of the isocyanide functional group by transition metals has evolved into numerous useful applications. Especially palladium-catalyzed isocyanide insertion processes have emerged as powerful reactions in the past decade. However, reports on the use of earth-abundant and cheap base metals in these types of transformations are scarce and have received far less attention. In this Minireview, we focus on these emerging base metal catalyzed reactions and highlight their potential in synthetic organic chemistry. Although mechanistic studies are still scarce, we discuss distinct proposed catalytic cycles and categorize the literature according to 1) the (hetero)atom bound to and 2) the type of bonding with the transition metal in which the (formal) insertion occurs.

    وصف الملف: application/pdf

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    المصدر: 2021 IEEE/IAS 57th Industrial and Commercial Power Systems Technical Conference (I&CPS).

    الوصف: This paper proposed a low-cost method to build the machine learning training dataset for assessing service transformer health by using fuzzy logic method. The training dataset is tested on a stimulated 50kVA server transformer. The monitoring data is collected from the real-time energy monitoring device which is installed near the transformer to measure ambient temperature, current, and voltage. The condition of transformer is evaluated by using Support Vector Machine algorithm. The data generation proposed in this paper has high feature continuity and good scalability that can be used as a training data for machine learning, deep learning models.

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