Organische synthesen mit übergangsmetall-komplexen: XLIX. Pyrrole aus einem aminocarben-chromkomplex und alkinen: Synthese eines neuartigen β-tripyrrans …
R Aumann, H Heinen
Index: Aumann, Rudolf; Heinen, Heinrich Journal of Organometallic Chemistry, 1990 , vol. 391, # 1 p. C7 - C11
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Citation Number: 13
Abstract
Abstract A β-tripyrane XI and cyclic β-trispyrrole XII were obtained by means of a novel two- step pyrrole synthesis from pentacarbonyl (1-amino-1-phenylmethylene)-chromium IV via an intermediate iminocarbene complex VI. VI adds alkynes VIIa–e to give the 1H-pyrroles Xa–e. Xe undergoes a rapid self-condensation with the formation of XI and XII.
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