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  1. Article ; Online: C

    Bag, Kingshuk / Pal, Aditya Kumar / Basu, Subhadip / Singla, Mamta / Sarkar, Biplab / Chatterji, Dipankar / Maiti, Prabal Kumar / Ghosh, Anirban / Jayaraman, Narayanaswamy

    ACS omega

    2023  Volume 8, Issue 23, Page(s) 20513–20523

    Abstract: ... of vitamin C as an inhibitor of Rel protein activities raises the prospect of tetrone lactones to prevent ...

    Abstract Hyperphosphorylated nucleotide (p)ppGpp, synthesized by Rel protein, regulates the stringent response pathway responsible for biofilm and persister cell growth in mycobacteria. The discovery of vitamin C as an inhibitor of Rel protein activities raises the prospect of tetrone lactones to prevent such pathways. The closely related isotetrone lactone derivatives are identified herein as inhibitors of the above processes in a mycobacterium. Synthesis and biochemical evaluations show that an isotetrone possessing phenyl substituent at
    Language English
    Publishing date 2023-05-31
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c00822
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Aqueous mediated iodine catalyzed C-N coupling followed by C-C coupling towards 5

    Bera, Debasish / Sarkar, Rajib / Saha, Pinaki / Ghosh, Prasanta / Mukhopadhyay, Chhanda

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 50, Page(s) 7771–7774

    Abstract: ... coupling reactions involving C ...

    Abstract Our study describes a new development featuring iodine-catalyzed two consecutive oxidative cross-coupling reactions involving C
    Language English
    Publishing date 2023-06-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d3cc01631e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: DMSO promoted catalyst-free oxidative C-N/C-O couplings towards synthesis of imidazoles and oxazoles.

    Bera, Debasish / Sarkar, Rajib / Dhar, Tiyasa / Saha, Pinaki / Ghosh, Prasanta / Mukhopadhyay, Chhanda

    Organic & biomolecular chemistry

    2024  

    Abstract: Dimethyl sulfoxide (DMSO)-promoted catalyst-free oxidative C-N coupling and C-O coupling under ... DMSO is not only used as a C-N/C-O coupling agent but is also used as the oxidant required ...

    Abstract Dimethyl sulfoxide (DMSO)-promoted catalyst-free oxidative C-N coupling and C-O coupling under oxidant-free conditions are outlined. This protocol is operationally simple and leads to various functionalized substituted imidazoles or oxazoles in good yields. To date, a very limited number of oxidation protocols have been established, where DMSO acts solely as a catalyst or an oxidant or both. In this report, DMSO is not only used as a C-N/C-O coupling agent but is also used as the oxidant required for these oxidative transformations. Hence, our demonstrated DMSO-promoted catalyst-free coupling transformation has the ability to lead to a new dimension in the field of oxidative coupling.
    Language English
    Publishing date 2024-04-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/d4ob00383g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Electrochemical C(sp

    Roy, Shantonu / Karmakar, Sudip / Mondal, Imtiaj / Naskar, Koushik / Sarkar, Writhabrata / Deb, Indubhusan

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 59, Page(s) 9074–9077

    Abstract: A straightforward strategy for direct access of C9- ... ...

    Abstract A straightforward strategy for direct access of C9-functionalized
    Language English
    Publishing date 2023-07-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d3cc02127k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Role of C and B

    Sarkar, P / Biswas, A / Kumar, Ravi / Rai, S / Jha, S N / Bhattacharyya, D

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 4, Page(s) 3072–3082

    Abstract: The optical performance of low-bilayer-thickness metallic multilayers (ML) can be improved significantly by limiting the intermixing of consecutive layers at the interfaces. Barrier layers are supposed to exhibit a decisive role in controlling diffusion ... ...

    Abstract The optical performance of low-bilayer-thickness metallic multilayers (ML) can be improved significantly by limiting the intermixing of consecutive layers at the interfaces. Barrier layers are supposed to exhibit a decisive role in controlling diffusion across the interfaces. The element-specific grazing incidence extended X-ray absorption fine structure technique using synchrotron radiation has been used in conjunction with grazing incidence X-ray reflectivity and diffuse X-ray scattering measurements to study the impact of the two most common barrier layers,
    Language English
    Publishing date 2023-01-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp03785h
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Electrochemical C-H Sulfonylation of Hydrazones.

    Sarkar, Biswajit / Ghosh, Payel / Hajra, Alakananda

    Organic letters

    2023  Volume 25, Issue 19, Page(s) 3440–3444

    Abstract: We have developed an electrochemical method for the direct C-H sulfonylation of aldehyde hydrazones ...

    Abstract We have developed an electrochemical method for the direct C-H sulfonylation of aldehyde hydrazones using sodium sufinates as the sulfonylating agent under supporting electrolyte-free conditions. This straightforward sulfonylation strategy afforded a library of (
    Language English
    Publishing date 2023-05-04
    Publishing country United States
    Document type Journal Article
    ISSN 1523-7052
    ISSN (online) 1523-7052
    DOI 10.1021/acs.orglett.3c00999
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Fluorenyl-tethered N-heterocyclic carbene (NHC): an exclusive C-donor ligand for heteroleptic calcium and strontium chemistry.

    Mondal, Sumana / Sarkar, Subham / Mandal, Chhotan / Mallick, Dibyendu / Mukherjee, Debabrata

    Chemical communications (Cambridge, England)

    2024  Volume 60, Issue 34, Page(s) 4553–4556

    Abstract: Exclusive C-donating ligands are rarely used with kinetically labile heavier alkaline earths (Ca ...

    Abstract Exclusive C-donating ligands are rarely used with kinetically labile heavier alkaline earths (Ca, Sr, Ba). We report herein the aptitude of a combination of NHC with fluorenyl connected by a flexible -(CH
    Language English
    Publishing date 2024-04-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d4cc00397g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: GxxxG Motif Stabilize Ion-Channel like Pores through C

    Rando, Carola / Grasso, Giuseppe / Sarkar, Dibakar / Sciacca, Michele Francesco Maria / Cucci, Lorena Maria / Cosentino, Alessia / Forte, Giuseppe / Pannuzzo, Martina / Satriano, Cristina / Bhunia, Anirban / La Rosa, Carmelo

    International journal of molecular sciences

    2023  Volume 24, Issue 3

    Abstract: Aβ (1-40) can transfer from the aqueous phase to the bilayer and thus form stable ion-channel-like pores where the protein has alpha-helical conformation. The stability of the pores is due to the presence of the GXXXG motif. It has been reported that ... ...

    Abstract Aβ (1-40) can transfer from the aqueous phase to the bilayer and thus form stable ion-channel-like pores where the protein has alpha-helical conformation. The stability of the pores is due to the presence of the GXXXG motif. It has been reported that these ion-channel-like pores are stabilized by a Cα-H···O hydrogen bond that is established between a glycine of the GXXXG sequence of an alpha-helix and another amino acid of a vicinal alpha-helix. However, conflicting data are reported in the literature. Some authors have suggested that hydrogen bonding does not have a stabilizing function. Here we synthesized pentapeptides having a GXXXG motif to explore its role in pore stability. We used molecular dynamics simulations, quantum mechanics, and experimental biophysical techniques to determine whether hydrogen bonding was formed and had a stabilizing function in ion-channel-like structures. Starting from our previous molecular dynamics data, molecular quantum mechanics simulations, and ATR data showed that a stable ion-channel-like pore formed and a band centered at 2910 cm
    MeSH term(s) Amino Acids ; Glycine/chemistry ; Hydrogen Bonding ; Ion Channels ; Molecular Conformation ; Molecular Dynamics Simulation ; Amyloid beta-Peptides/chemistry
    Chemical Substances Amino Acids ; Glycine (TE7660XO1C) ; Ion Channels ; Amyloid beta-Peptides
    Language English
    Publishing date 2023-01-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24032192
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: 1D/2D interface engineering of a CoPc-C

    Paul, Sourav / Sarkar, Sougata / Dolui, Dependu / Sarkar, Debashrita / Robert, Marc / Ghorai, Uttam Kumar

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 42, Page(s) 15360–15364

    Abstract: ... carbon nitride (C ...

    Abstract Herein, we demonstrate the construction of a 1D/2D heterostructure of cobalt phthalocyanine (CoPc)-carbon nitride (C
    Language English
    Publishing date 2023-10-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt01790g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Ru(II) catalyzed chelation assisted C(sp

    Sarkar, Anindita / Saha, Moumita / Das, Asish R

    Organic & biomolecular chemistry

    2023  Volume 21, Issue 27, Page(s) 5567–5586

    Abstract: ... coumarin-fused pyridone nucleus by activating the vinylic C(sp ...

    Abstract Efficacious protocols have been established to synthesize a structurally privileged Π-extended coumarin-fused pyridone nucleus by activating the vinylic C(sp
    Language English
    Publishing date 2023-07-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/d3ob00828b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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