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  1. Article ; Online: A microwave-assisted intramolecular aminopalladation-triggered domino sequence: an atom economical route to 5,10-dihydroindeno[1,2-

    Jandial, Tanvi / Gupta, Anish / Jan, Gowsia / Karuppasamy, Muthu / Nagarajan, Subbiah / Maheswari, C Uma / Sridharan, Vellaisamy

    Organic & biomolecular chemistry

    2023  Volume 21, Issue 15, Page(s) 3121–3131

    Abstract: A microwave-assisted, palladium(II)-catalyzed cascade reaction of 2-alkynylanilines tethered with an α,β-unsaturated carbonyl moiety was established to access 5,10-dihydroindeno[1,2- ...

    Abstract A microwave-assisted, palladium(II)-catalyzed cascade reaction of 2-alkynylanilines tethered with an α,β-unsaturated carbonyl moiety was established to access 5,10-dihydroindeno[1,2-
    Language English
    Publishing date 2023-04-12
    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/d3ob00041a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Palladium-catalyzed intramolecular oxypalladation-initiated cascade: solvent-dependent chemodivergent approach to functionalized benzazepines and tetrahydroquinolines.

    Gupta, Anish / Jandial, Tanvi / Karuppasamy, Muthu / Bhuvanesh, Nattamai / Nagarajan, Subbiah / Maheswari, C Uma / Sridharan, Vellaisamy

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 35, Page(s) 5233–5236

    Abstract: Palladium-catalyzed, solvent-dependent intramolecular oxypalladation-triggered domino sequences of internal alkynes bearing tethered nucleophilic carboxylic ester and electrophilic enone functionalities were developed for the chemodivergent synthesis of ... ...

    Abstract Palladium-catalyzed, solvent-dependent intramolecular oxypalladation-triggered domino sequences of internal alkynes bearing tethered nucleophilic carboxylic ester and electrophilic enone functionalities were developed for the chemodivergent synthesis of two completely distinct biologically significant complex molecules including isochromenone-fused benzazepines and isobenzofuranone-fused tetrahydroquinolines/chromanes in a single synthetic operation.
    Language English
    Publishing date 2023-04-27
    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/d3cc01370g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Microwave-Assisted Copper(II)-Catalyzed Cascade Cyclization of 2-Propargylamino/Oxy-Arylaldehydes and O-Phenylenediamines: Access to Densely Functionalized Benzo[f]Imidazo[1,2-d][1,4]Oxazepines and Benzo[f]Imidazo[1,2-d][1,4]Diazepines

    Rajput, Diksha / Kumar, Atul / Jandial, Tanvi / Karuppasamy, Muthu / Bhuvanesh, Nattamai / Kumar, Raju Suresh / Almansour, Abdulrahman I. / Sridharan, Vellaisamy

    Journal of organic chemistry. 2022 June 28, v. 87, no. 14

    2022  

    Abstract: A highly efficient microwave-assisted copper(II)-catalyzed cyclization cascade was established starting from readily accessible O/N-propargylated 2-hydroxy or 2-aminobenzaldehydes and o-phenylenediamines to synthesize densely functionalized imidazo[1,2-d] ...

    Abstract A highly efficient microwave-assisted copper(II)-catalyzed cyclization cascade was established starting from readily accessible O/N-propargylated 2-hydroxy or 2-aminobenzaldehydes and o-phenylenediamines to synthesize densely functionalized imidazo[1,2-d][1,4]oxazepines and imidazo[1,2-d][1,4]diazepines in high yields (up to 93%). This one-pot two-step process was found to be highly atom economical (−H₂O, −H₂) and operationally simple and enabled the generation of two new heterocycle rings (seven- and five-membered) and three new C–N bonds in a single synthetic operation. These reactions well tolerated a variety of substituents including electron-donating and electron-withdrawing groups and furnished the desired fused heterocycles in high yields under microwave irradiation in a very short reaction time. The mechanism of the established protocol involves sequential imine formation–intramolecular cyclization–air oxidation followed by 7-exo-dig cyclization steps. A comparative study between the microwave-assisted approach and conventional heating was also performed to demonstrate the advantages of the microwave-assisted protocol in terms of high yield and shorter reaction time.
    Keywords comparative study ; copper ; cyclization reactions ; heat ; heterocyclic compounds ; imines ; microwave radiation ; microwave treatment ; organic chemistry ; oxidation
    Language English
    Dates of publication 2022-0628
    Size p. 8956-8969.
    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.2c00671
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Microwave-Assisted Copper(II)-Catalyzed Cascade Cyclization of 2-Propargylamino/Oxy-Arylaldehydes and

    Rajput, Diksha / Kumar, Atul / Jandial, Tanvi / Karuppasamy, Muthu / Bhuvanesh, Nattamai / Kumar, Raju Suresh / Almansour, Abdulrahman I / Sridharan, Vellaisamy

    The Journal of organic chemistry

    2022  Volume 87, Issue 14, Page(s) 8956–8969

    Abstract: A highly efficient microwave-assisted copper(II)-catalyzed cyclization cascade was established starting from readily ... ...

    Abstract A highly efficient microwave-assisted copper(II)-catalyzed cyclization cascade was established starting from readily accessible
    MeSH term(s) Azepines ; Catalysis ; Copper ; Cyclization ; Microwaves ; Oxazepines ; Phenylenediamines
    Chemical Substances Azepines ; Oxazepines ; Phenylenediamines ; Copper (789U1901C5)
    Language English
    Publishing date 2022-06-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.2c00671
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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