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Chiral Auxiliary Approach for Gold(I)-Catalyzed Cyclizations

  • Dades identificatives

    Identificador: imarina:9331756
    Autors:
    Cataffo, APena-Lopez, MPedrazzani, REchavarren, AM
    Resum:
    Two different classes of stereoselective cyclizations have been developed using a chiral auxiliary approach with commercially available [JohnPhosAu(MeCN)SbF6] as catalyst. First, a stereoselective cascade cyclization of 1,5-enynes was achieved using the Oppolzer camphorsultam as chiral auxiliary. In this case, a one-pot cyclization-hydrolysis sequence was developed to directly afford enantioenriched spirocyclic ketones. Then, the stereoselective alkoxycyclization of 1,6-enynes was mediated by an Evans-type oxazolidinone. A reduction-hydrolysis sequence was selected to remove the auxiliary to give enantioenriched β-tetralones. DFT studies confirmed that the steric clash between the chiral auxiliary and alkene accounts for the experimentally observed diastereoselective cyclization through the Si face.
  • Altres:

    Autor segons l'article: Cataffo, A; Pena-Lopez, M; Pedrazzani, R; Echavarren, AM
    Departament: Química Analítica i Química Orgànica
    Autor/s de la URV: Cataffo, Andrea / ECHAVARREN PABLOS, ANTONIO
    Paraules clau: Spirocyclic ketones Intermolecular 2+2 cycloaddition Gold catalysis Enynes Chiral auxiliaries Alkoxycyclization unique spirocyclic ketones rearrangement gold catalysis enynes enantioselective construction cycloisomerizations chiral auxiliaries catalyzed reaction c-n alkynes alkenes
    Resum: Two different classes of stereoselective cyclizations have been developed using a chiral auxiliary approach with commercially available [JohnPhosAu(MeCN)SbF6] as catalyst. First, a stereoselective cascade cyclization of 1,5-enynes was achieved using the Oppolzer camphorsultam as chiral auxiliary. In this case, a one-pot cyclization-hydrolysis sequence was developed to directly afford enantioenriched spirocyclic ketones. Then, the stereoselective alkoxycyclization of 1,6-enynes was mediated by an Evans-type oxazolidinone. A reduction-hydrolysis sequence was selected to remove the auxiliary to give enantioenriched β-tetralones. DFT studies confirmed that the steric clash between the chiral auxiliary and alkene accounts for the experimentally observed diastereoselective cyclization through the Si face.
    Àrees temàtiques: Química Medicina ii Medicina i Materiais Interdisciplinar General medicine General chemistry Farmacia Engenharias ii Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemistry Catalysis Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: antoniomaria.echavarren@urv.cat andrea.cataffo@estudiants.urv.cat
    Identificador de l'autor: 0000-0002-6418-7930
    Data d'alta del registre: 2024-08-03
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://onlinelibrary.wiley.com/doi/10.1002/anie.202312874
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Angewandte Chemie (International Ed. Print). 62 (49): e202312874-
    Referència de l'ítem segons les normes APA: Cataffo, A; Pena-Lopez, M; Pedrazzani, R; Echavarren, AM (2023). Chiral Auxiliary Approach for Gold(I)-Catalyzed Cyclizations. Angewandte Chemie (International Ed. Print), 62(49), e202312874-. DOI: 10.1002/anie.202312874
    DOI de l'article: 10.1002/anie.202312874
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2023
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Catalysis,Chemistry,Chemistry (Miscellaneous),Chemistry, Multidisciplinary
    Spirocyclic ketones
    Intermolecular 2+2 cycloaddition
    Gold catalysis
    Enynes
    Chiral auxiliaries
    Alkoxycyclization
    unique
    spirocyclic ketones
    rearrangement
    gold catalysis
    enynes
    enantioselective construction
    cycloisomerizations
    chiral auxiliaries
    catalyzed reaction
    c-n
    alkynes
    alkenes
    Química
    Medicina ii
    Medicina i
    Materiais
    Interdisciplinar
    General medicine
    General chemistry
    Farmacia
    Engenharias ii
    Ciências biológicas iii
    Ciências biológicas ii
    Ciências biológicas i
    Chemistry, multidisciplinary
    Chemistry (miscellaneous)
    Chemistry (all)
    Chemistry
    Catalysis
    Astronomia / física
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