Jasimuddin Ahmed

Indian Institute of Science Education and Research Kolkata

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Swadhin K. Mandal

Indian Institute of Science Education and Research Kolkata

Arpan Das

Ruhr University Bochum

Gonela Vijaykumar

Indian Institute of Chemical Technology

Pradip Kumar Hota

Johns Hopkins University

Natesan Mannangatti Rajendran

Ewha Womans University

P Sreejyothi

Indian Institute of Science Education and Research Kolkata

Bhagat Singh

Chaudhary Charan Singh Haryana Agricultural University

Debashis Adhikari

Indian Institute of Science Education and Research Mohali

Soumi Chakraborty

Ramakrishna Mission Vivekananda Educational and Research Institute

Pavan K. Vardhanapu

Okinawa Institute of Science and Technology Graduate University

Cooperative Institutions

Indian Institute of Science Education and Research Kolkata

University of Göttingen

Council of Scientific and Industrial Research

Jawaharlal Nehru Centre for Advanced Scientific Research

University of Turin

Jadavpur University

Central Glass and Ceramic Research Institute

Indian Institute of Science Bangalore

Indian Institute of Science Education and Research Mohali

Bangalore University

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Study of (1-alkoxyethyl)diphenylphosphine oxides. II. Conformational analysis by theoretical calculations.

Piero Ugliengo Jasimuddin Ahmed Davide Viterbo Maurizio Ceruti

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NHC-catalyzed silylative dehydration of primary amides to nitriles at room temperature

Chemical Communications (2019)

Pradip Kumar Hota Subir Maji Jasimuddin Ahmed Natesan Mannangatti Rajendran Swadhin K. Mandal

Herein we report an abnormal N-heterocyclic carbene catalyzed dehydration of primary amides in the presence of a silane. This process bypasses the energy demanding 1,2-siloxane elimination step usually required for metal/silane catalyzed reactions. A detailed mechanistic cycle of this process has been proposed based on experimental evidence along with computational study.

Siloxane

Primary (astronomy)

Catalytic cycle

10.1039/c9cc08413d

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Citations (21)

CCDC 1978719: Experimental Crystal Structure Determination

The Cambridge Structural Database (2020)

Arpan Das Jasimuddin Ahmed Natesan Mannangatti Rajendran Debashis Adhikari Swadhin K. Mandal

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc24f0n8

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Phenalenyl Based Aluminum Compound for Catalytic C–H Arylation of Arene and Heteroarenes at Room Temperature

The Journal of Organic Chemistry (2018)

Pavan K. Vardhanapu Jasimuddin Ahmed Anex Jose Bikash Kumar Shaw Tamal K. Sen

Main group metal based catalysis has been considered to be a cost-effective alternative way to the transition metal based catalysis, due to the high abundance of main group metals in the Earth's crust. Among the main group metals, aluminum is the most abundant (7–8%) in the Earth's crust, making the development of aluminum based catalysts very attractive. So far, aluminum based compounds have been popularly used as Lewis acids in a variety of organic reactions, but chemical transformation demanding a redox based process has never utilized an Al(III) complex as a catalyst. Herein, we tuned the redox noninnocence behavior of a phenalenyl ligand by coupling with Al(III) ion, which subsequently can store the electron upon reduction with K to carry out direct C–H arylation of heteroarenes/mesitylene at ambient temperature. A mechanistic investigation revealed that a three-electron reduced phenalenyl based triradical aluminum(III) complex plays the key role in such catalysis. The electronic structure of the catalytically active triradical species has been probed using EPR spectroscopy, magnetic susceptibility measurements, and electronic structure calculations using a DFT method.

10.1021/acs.joc.8b02699

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Citations (14)

Integrating Organic Lewis Acid and Redox Catalysis: The Phenalenyl Cation in Dual Role

Journal of the American Chemical Society (2018)

Jasimuddin Ahmed Soumi Chakraborty Anex Jose P Sreejyothi Swadhin K. Mandal

In recent years, merging different types of catalysis in a single pot has drawn considerable attention and these catalytic processes have mainly relied upon metals. However, development of a completely metal free approach integrating organic redox and organic Lewis acidic property into a single system has been missing in the current literature. This study establishes that a redox active phenalenyl cation can activate one of the substrates by single electron transfer process while the same can activate the other substrate by a donor–acceptor type interaction using its Lewis acidity. This approach has successfully achieved light and metal-free catalytic C–H functionalization of unactivated arenes at ambient temperature (39 entries, including core moiety of a top-selling molecule boscalid), an economically attractive alternative to the rare metal-based multicatalysts process. A tandem approach involving trapping of reaction intermediates, spectroscopy along with density functional theory calculations unravels the dual role of phenalenyl cation.

Dual role

Lewis acid catalysis

10.1021/jacs.8b04786

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Citations (48)

Switching between mono and doubly reduced odd alternant hydrocarbon: designing a redox catalyst

Chemical Science (2020)

Jasimuddin Ahmed Paramita Datta Arpan Das Stephy Jomy Swadhin K. Mandal

A doubly reduced redox non-innocent phenalenyl based transition metal free catalyst has been designed and utilized in the development of the C–C cross coupling reaction through the activation of aryl halides at room temperature.

Coupling reaction

10.1039/d0sc05972b

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Citations (18)

A Bottleable Imidazole-Based Radical as a Single Electron Transfer Reagent

The Journal of Organic Chemistry (2020)

Arpan Das Jasimuddin Ahmed Natesan Mannangatti Rajendran Debashis Adhikari Swadhin K. Mandal

Reduction of 1,3-bis(2,6-diisopropylphenyl)-2,4-diphenyl-1H-imidazol-3-ium chloride (1) resulted in the formation of the first structurally characterized imidazole-based radical 2. 2 was established as a single electron transfer reagent by treating it with an acceptor molecule tetracyanoethylene. Moreover, radical 2 was utilized as an organic electron donor in a number of organic transformations such as in activation of an aryl–halide bond, alkene hydrosilylation, and in catalytic reduction of CO2 to methoxyborane, all under ambient temperature and pressure.

Tetracyanoethylene

Imidazole

Alkene

Acceptor

Radical ion

Electron donor

Electron acceptor

Hydrosilylation

10.1021/acs.joc.0c02465

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Citations (19)

Structure of tris(N,N-dimethylthiocarbamato)iron(III), Fe(SOCN(CH3)2)3

Inorganic Chemistry (1977)

Jasimuddin Ahmed James A. Ibers

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of tris(N,N-dimethylthiocarbamato)iron(III), Fe(SOCN(CH3)2)3J. Ahmed and James A. IbersCite this: Inorg. Chem. 1977, 16, 4, 935–937Publication Date (Print):April 1, 1977Publication History Published online1 May 2002Published inissue 1 April 1977https://pubs.acs.org/doi/10.1021/ic50170a043https://doi.org/10.1021/ic50170a043research-articleACS PublicationsRequest reuse permissionsArticle Views68Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts

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10.1021/ic50170a043

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Citations (15)

Tuning the redox non-innocence of a phenalenyl ligand toward efficient nickel-assisted catalytic hydrosilylation

Chemical Science (2018)

Gonela Vijaykumar Anand Pariyar Jasimuddin Ahmed Bikash Kumar Shaw Debashis Adhikari

The hydrosilylation of olefins by a nickel(ii) catalyst assisted by a redox non-innocent phenalenyl (PLY) ligand is reported.

Hydrosilylation

10.1039/c7sc04687a

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