LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 8 of total 8

Search options

  1. Article ; Online: Synthesis of indene-fused spiro-dibenz(ox)azepines

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

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 50, Page(s) 7751–7754

    Abstract: We report an unprecedented atom-economic one-pot Cp*Rh(III)-catalyzed regioselective [3+2]-spiroannulation reaction between dibenz(ox)azepines and ynones, allowing the synthesis of biologically relevant novel spirocyclic dibenz(ox)azepines under ... ...

    Abstract We report an unprecedented atom-economic one-pot Cp*Rh(III)-catalyzed regioselective [3+2]-spiroannulation reaction between dibenz(ox)azepines and ynones, allowing the synthesis of biologically relevant novel spirocyclic dibenz(ox)azepines under operationally simple and mild reaction conditions. The reaction proceeds without any silver additive or external oxidant implementing a redox-neutral pathway. A broad substrate scope with diverse functional group tolerance permitted the regioselective synthesis of a wide spectrum of indene-containing spirocyclic dibenz(ox)azepines in good to excellent yields. Also, we showcased detailed mechanistic studies to justify the formation of spirocycles. In addition, the synthetic utility of this process was also demonstrated by the modular synthesis of various steroid conjugates.
    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/d3cc01416a
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  2. Article ; Online: [3+2] Cascade Ring-Closing/Ring-Opening Strategy: Access to

    Mondal, Imtiaj / Roy, Shantonu / Naskar, Koushik / Karmakar, Sudip / Chowdhury, Moumita / Deb, Indubhusan

    Organic letters

    2023  Volume 25, Issue 46, Page(s) 8199–8204

    Abstract: An unprecedented atom-economic redox neutral regioselective Rh(III)-catalyzed cascade [3+2] annulation of 2-aryl oxazoline with α,β-unsaturated nitro olefins has been accomplished, furnishing a novel set of nitro-functionalized indene-tethered amino ... ...

    Abstract An unprecedented atom-economic redox neutral regioselective Rh(III)-catalyzed cascade [3+2] annulation of 2-aryl oxazoline with α,β-unsaturated nitro olefins has been accomplished, furnishing a novel set of nitro-functionalized indene-tethered amino alcohols through a synergistic ring-closing/ring-opening strategy via the formation of two new C-C bonds and the regioselective cleavage of the C2-O bond of oxazoline under silver free mild reaction conditions with a broad substrate scope.
    Language English
    Publishing date 2023-11-10
    Publishing country United States
    Document type Journal Article
    ISSN 1523-7052
    ISSN (online) 1523-7052
    DOI 10.1021/acs.orglett.3c02975
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. 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

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  4. Article: Regio- and Diastereoselective [3 + 2]-Spiroannulation of Benzoxazines with Chalcones: A Rh(III)-Catalyzed Redox-Neutral Approach to α-Aroyl Spiro-Indanamines

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

    Journal of organic chemistry. 2022 July 13, v. 87, no. 15

    2022  

    Abstract: We report an atom-economic Rh(III)-catalyzed [3 + 2]-spiroannulation reaction between cyclic ketimines and α,β-unsaturated carbonyl compounds, allowing the synthesis of novel spirocycles with concomitant generation of three stereogenic centers in one pot. ...

    Abstract We report an atom-economic Rh(III)-catalyzed [3 + 2]-spiroannulation reaction between cyclic ketimines and α,β-unsaturated carbonyl compounds, allowing the synthesis of novel spirocycles with concomitant generation of three stereogenic centers in one pot. The reaction does not require any silver additives or external oxidants and is believed to proceed in a redox-neutral manner. A broad substrate scope with good functional group tolerance permitted the synthesis of a vast spectrum of spirocyclic 1,4-benzoxazine derivatives containing polysubstituted α-aroyl-indanamines in good to excellent yields with high diastereoselectivity.
    Keywords chalcones ; diastereoselectivity ; ketimines ; organic chemistry ; silver
    Language English
    Dates of publication 2022-0713
    Size p. 9988-10002.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.2c00974
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 49/42: Show issues
    Z 7.1: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Regio- and Diastereoselective [3 + 2]-Spiroannulation of Benzoxazines with Chalcones: A Rh(III)-Catalyzed Redox-Neutral Approach to α-Aroyl Spiro-Indanamines.

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

    The Journal of organic chemistry

    2022  Volume 87, Issue 15, Page(s) 9988–10002

    Abstract: We report an atom-economic Rh(III)-catalyzed [3 + 2]-spiroannulation reaction between cyclic ketimines and α,β-unsaturated carbonyl compounds, allowing the synthesis of novel spirocycles with concomitant generation of three stereogenic centers in one pot. ...

    Abstract We report an atom-economic Rh(III)-catalyzed [3 + 2]-spiroannulation reaction between cyclic ketimines and α,β-unsaturated carbonyl compounds, allowing the synthesis of novel spirocycles with concomitant generation of three stereogenic centers in one pot. The reaction does not require any silver additives or external oxidants and is believed to proceed in a redox-neutral manner. A broad substrate scope with good functional group tolerance permitted the synthesis of a vast spectrum of spirocyclic 1,4-benzoxazine derivatives containing polysubstituted α-aroyl-indanamines in good to excellent yields with high diastereoselectivity.
    Language English
    Publishing date 2022-07-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.2c00974
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 4473: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  6. Article ; Online: A condition-tuned unorthodox approach to indole-3-carboxylic acids and anthranilic acids

    Bhowmik, Arup / Naskar, Koushik / Roy, Shantonu / Karmakar, Sudip / Sarkar, Writhabrata / Mondal, Imtiaj / Sana, Arindam / Deb, Indubhusan

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 93, Page(s) 13899–13902

    Abstract: We describe a robust one-pot cascade method for the synthesis of indole-3-carboxylic acids using isatins and ... ...

    Abstract We describe a robust one-pot cascade method for the synthesis of indole-3-carboxylic acids using isatins and DMSO
    Language English
    Publishing date 2023-11-21
    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/d3cc04443b
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  7. Article ; Online: A radical-radical cross-coupling reaction of xanthene with sulfonyl hydrazides: facile access to xanthen-9-sulfone derivatives.

    Das, Sumit / Roy, Shantonu / Bhowmik, Arup / Sarkar, Writhabrata / Mondal, Imtiaj / Mishra, Aniket / Saha, Shubhra Jyoti / Karmakar, Sudip / Deb, Indubhusan

    Chemical communications (Cambridge, England)

    2022  Volume 58, Issue 17, Page(s) 2902–2905

    Abstract: A straightforward strategy for direct incorporation of sulfonyl units into a xanthene moiety for accessing xanthen-9-sulfone derivatives in good to excellent yields has been ... ...

    Abstract A straightforward strategy for direct incorporation of sulfonyl units into a xanthene moiety for accessing xanthen-9-sulfone derivatives in good to excellent yields has been established
    Language English
    Publishing date 2022-02-24
    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/d1cc07143b
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  8. Article: A radical–radical cross-coupling reaction of xanthene with sulfonyl hydrazides: facile access to xanthen-9-sulfone derivatives

    Das, Sumit / Roy, Shantonu / Bhowmik, Arup / Sarkar, Writhabrata / Mondal, Imtiaj / Mishra, Aniket / Saha, Shubhra Jyoti / Karmakar, Sudip / Deb, Indubhusan

    Chemical communications. 2022 Feb. 24, v. 58, no. 17

    2022  

    Abstract: A straightforward strategy for direct incorporation of sulfonyl units into a xanthene moiety for accessing xanthen-9-sulfone derivatives in good to excellent yields has been established via metal-free radical–radical cross-coupling reaction of xanthenes ... ...

    Abstract A straightforward strategy for direct incorporation of sulfonyl units into a xanthene moiety for accessing xanthen-9-sulfone derivatives in good to excellent yields has been established via metal-free radical–radical cross-coupling reaction of xanthenes and sulfonyl hydrazides. Using easily accessible starting materials, this methodology proceeds efficiently with a high degree of functional group compatibility and with a wide scope of both xanthenes and sulfonyl hydrazides under operationally simple reaction conditions. Mechanistic investigations revealed that sulfonyl radicals could be generated from sulfonyl hydrazides in the presence of TBHP under an oxygen atmosphere.
    Keywords cross-coupling reactions ; hydrazides ; moieties ; oxygen ; xanthenes
    Language English
    Dates of publication 2022-0224
    Size p. 2902-2905.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d1cc07143b
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top