PDF herunterladen
Synlett 1992; 1992(1): 70-72
DOI: 10.1055/s-1992-21270
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.

Generation and Reaction of a Transition Metal Stabilized But-2-yne-1,4-dicarbenium Ion: The First Example of the Double Nicholas Reaction

Seiichi Takano* , Takumichi Sugihara, Kunio Ogasawara
  • *Pharmaceutical Institute, Tohoku University, Aobayama, Sendai 980, Japan
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
18. September 2002 (online)

  als PDF herunterladen  Lizenzen und Reprints Alle Artikel dieser Rubrik

Reaction of the dicobalt hexacarbonyl complex of 1,4-dibenzyloxybut-2-yne with nucleophiles occurs facilely at the 1,4-centers in one step in the presence of diethyl ether-boron trifluoride complex to give 1,4-difunctionalized but-2-yne complexes in excellent yield via a formal generation of transition metal stabilized but-2-yne-1,4-dicarbenium ion intermediate. The reaction is taken as the first example of the double Nicholas reaction.