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Titolo:
Reversal of asymmetric induction in arenetricarbonyl-chromium(0) complexesvia dilithiation with the (-)-sparteine/BuLi system and enantioselective quench
Autore:
Tan, YL; Widdowson, DA; Wilhelm, R;
Indirizzi:
Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England Univ London Imperial Coll Sci Technol & Med London England SW7 2AZ gland
Titolo Testata:
SYNLETT
fascicolo: 10, , anno: 2001,
pagine: 1632 - 1634
SICI:
0936-5214(200110):10<1632:ROAIIA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
LITHIATION; DEPROTONATION; SUBSTITUTION; PATHWAYS;
Keywords:
arenetricarbonylchromium(0) complexes; dilithiation; (-)-sparteine; enantioselective deprotonation; enantioselective quench;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Widdowson, DA Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England Univ London Imperial Coll Sci Technol & Med London England SW7 2AZ
Citazione:
Y.L. Tan et al., "Reversal of asymmetric induction in arenetricarbonyl-chromium(0) complexesvia dilithiation with the (-)-sparteine/BuLi system and enantioselective quench", SYNLETT, (10), 2001, pp. 1632-1634

Abstract

Dilithiation of methoxymethoxyarenetricarbonylchromium complexes by 2.5 equivalents of BuLi and 6 equivalents of (-)-sparteine followed by enantioselective electrophilic quench gave the planar chiral (R)-enantiomers in up to95% enantiomeric excess. This was the opposite enantiomer obtained under conditions for enantioselective monolithiation with (-)-sparteine/BuLi.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 04:40:05