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Synthesis 1995; 1995(11): 1389-1392
DOI: 10.1055/s-1995-4121
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The Reaction of a 1,6-Methano[10]annulene-Substituted Tungsten Fischer Carbene Complex with Alkynes

Richard Neidlein* , Stephan Gürtler, Claus Krieger
  • *Pharmazeutisch-chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany, Fax +49(6221)563430
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Publication Date:
31 December 2000 (online)

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The 1,6-methano[10]annulene-substituted tungsten carbene complex 1 reacts with alkynes 2a-c through a [3+2] cycloaddition process. In each case only one of all possible regio- and stereoisomers was formed. The structure of one of the cycloadducts (enol ether 3a) was determined by X-ray structure analysis, whereas the configuration of the cyclopentenones 5b and 5c is not yet clear.

tungsten Fischer carbene complex of 1,6-methano[10]-annulene - [3+2]cycloadditions with alkynes - X-ray structure analysis