Further Uses of Pyrrole-Based Dienoxysilane Synthons: A Full Aldol Approach to Azabicyclo[x.2.1]alkane Systems. (Articolo in rivista)

Type
Label
  • Further Uses of Pyrrole-Based Dienoxysilane Synthons: A Full Aldol Approach to Azabicyclo[x.2.1]alkane Systems. (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/ejoc.200800040 (literal)
Alternative label
  • Zanardi F.; Curti C.; Sartori A.; Rassu G.; Roggio A.; Battistini L.; Burreddu P.; Pinna L.; Pelosi G.; Casiraghi G. (2008)
    Further Uses of Pyrrole-Based Dienoxysilane Synthons: A Full Aldol Approach to Azabicyclo[x.2.1]alkane Systems.
    in European journal of organic chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Zanardi F.; Curti C.; Sartori A.; Rassu G.; Roggio A.; Battistini L.; Burreddu P.; Pinna L.; Pelosi G.; Casiraghi G. (literal)
Pagina inizio
  • 2273 (literal)
Pagina fine
  • 2287 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1002/ejoc.200800040/pdf (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 13 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento Farmaceutico, Universita` degli Studi di Parma, Viale G. P. Usberti 27A, Parma I-43100, Italy Istituto di Chimica Biomolecolare del CNR, Traversa La Crucca 3, Li Punti, Sassari I-07040, Italy Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Universita` di Parma, Viale G. P. Usberti 17A, I-43100 Parma, Italy Dipartimento di Chimica, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy (literal)
Titolo
  • Further Uses of Pyrrole-Based Dienoxysilane Synthons: A Full Aldol Approach to Azabicyclo[x.2.1]alkane Systems. (literal)
Abstract
  • Two racemic 2-azabicyclo[2.2.1]heptane structures, 15 and 21, and two chiral non-racemic 6-azabicyclo[3.2.1]octane representatives, 28 and 36, have been synthesized starting from 1-(tert-butoxycarbonyl)-2-(tert-butyldimethylsilyloxy)- pyrrole (TBSOP, 5) and suitable ketones, 9, 16, 22 and 29. 2- Azabicycle 15 was then elaborated to racemic cyclopentane amino acid 38, while 6-azabicycle 36 served to access the enantiomerically pure normorphan-type structure 40. For all substrates, a uniform synthetic scheme was implemented based on the combination of two diastereoselective aldoltype carbon-carbon bond-forming reactions, the efficiencies of which were secured by appropriate aldol-stabilizing steps. A mechanistic rationale accounting for the markedly diastereoselective character of the key Mukaiyama aldol reactions between TBSOP and the ketone acceptors has been postulated that involves hetero-Diels-Alder transition-state structures in which the preference for endo versus exo addition is governed by the electronic nature of the substituents in the ketone substrates. (literal)
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