PDF herunterladen
Synlett 1998; 1998(8): 924-926
DOI: 10.1055/s-1998-1815
letter
© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

Functionalized Triarylcarbenium Ions as Catalysts in Mukaiyama Aldol Addition: Effects of Counter Ions and Silyl Groups on the Intervention of Silyl Catalysis

Chien-Tien Chen* , Shi-Deh Chao, Kuao-Chung Yen
  • *Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan 117; Fax 011-886-2-29 32 42 49; E-mail: chefv043@scc.ntnu.edu.tw
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
31. Dezember 2000 (online)

  als PDF herunterladen  Lizenzen und Reprints Alle Artikel dieser Rubrik

Stereochemical studies have indicated that functionalized Tr+SbCl6 - may serve as efficient aldol reaction catalysts by judicious choice of a silyl component. The aldol addition between TMS ketene acetal derived from γ-butyrolactone and benzaldehyde provided the silyl aldolates with high syn diastereoselectivities.

Meerwein salts - ionization - trityl ions - diastereoselective - β-hydroxylactones