Download PDF
Synlett 1993; 1993(7): 486-488
DOI: 10.1055/s-1993-22500
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.

Un Unexpected Tricarbonyl(fulvene)chromium Complex from a Pentacarbonyl[(Z) -2-dimethylaminoethenyl]carbenechromium Complex and 1-Pentyne

Frank Stein* , Michael Duetsch, Matthias Noltemeyer, Armin de Meijere
  • *Institut für Organische Chemie, Georg-August-Universität Göttingen, Tammarmstraße 2,D-3400 Göttingen, Germany
Further Information

Publication History

Publication Date:
19 March 2002 (online)

  PDF Download  Permissions and Reprints All articles of this category

Michael addition of dimethylamine to pentacarbonyl[1-ethoxy-4-methyl-4 -trimethylsilyloxypentynylidene]chromium 1 gives pentacarbonyl[(2Z)-3-dimethylamino-1-ethoxy-4-methyl-4- trimethylsilyloxypentenylidene]chromium 2 in high yield. Complex 2 reacts with 1-pentyne to give tricarbonyl (6,6-dimethyl-1-dimethylamino-1-ethoxy-2-propylfulvene)chromium 6 as the main product. In the presence of base or fluoride, complex 2 cyclizes after desilylation to pentacarbonyl(4-dimethylamino-3,3-dimethyl-2-oxacyclopentenylidene)chromium complex 7 in excellent yield.

      >