http://www.cnr.it/ontology/cnr/individuo/prodotto/ID15700
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
- 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
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://onlinelibrary.wiley.com/doi/10.1002/ejoc.200800040/pdf (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
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- 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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