Department Of Chemistry

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Author: search.filters.author.Malakar, Chandi C.Subject: search.filters.subject.Kumujian C

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    Transition-Metal-Free Cascade C-N Bond Formation: An Effective Strategy for the Synthesis of ?-Carboline N-Fused Imidazolium Acetates and Estimation of their Light-Emitting Properties
    (Georg Thieme Verlag, 2023-08-08T00:00:00) Singh, Manpreet; Vaishali, Vaishali; Deepika, Deepika; Jyoti, Jyoti; Sharma, Shubham; Banyal, Naveen; Kumar, Prashant; Budhalakoti, Bharti; Malakar, Chandi C.; Singh, Virender
    A simple, efficient, and practical metal-free protocol has been devised to synthesize imidazopyrido[3,4-b]indole-based fluorophores decorated with carbazole/ F-carboline/pyridine scaffolds via three consecutive C.N bond formations in a single operation. A wide range of aromatic amines (2-aminopyridines, 3-aminocarbazole, and anilines) were successfully applied to synthesize the complex imidazolium ions. The significant features of this strategy include high efficiency, mild and environmentally benign reaction conditions, no chromatographic purification, and broad substrate scope with excellent yields of the isolated products. Moreover, excellent photophysical properties (up to 85%) were exhibited by these fluorophores. � 2022 Georg Thieme Verlag. All rights reserved.
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    Cu(II)-Catalysed Azide-Alkyne Cycloaddition Reaction towards Synthesis of ?-Carboline C1-Tethered 1,2,3-Triazole Derivatives
    (John Wiley and Sons Inc, 2021-04-27T00:00:00) Kumar, Sunit; Malakar, Chandi C.; Singh, Virender
    Indole and ?-carboline alkaloids exhibit diverse range of significant pharmacological properties as reflected by their contribution in drug-discovery. We have described the synthesis of hybrid molecules containing ?-carboline C1-linked 1,2,3-triazoles in moderate to good yields. The developed transformation was realized by using Cu(II)-catalysed click-reaction of diverse alkynes with in-situ derived rarely explored ?-carboline tethered aliphatic azides. These molecular hybrids also exhibited excellent fluorescence properties. � 2021 Wiley-VCH GmbH