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  1. Intermolecular and Intramolecular Pauson–Khand Reactions of Functionalized Allenes
    González-Gómez, Á.; Añorbe, L.; Poblador, A.; Domínguez, G.; Pérez-Castells, J.
    Eur. J. Org. Chem. 2008, 1370-1377

Pauson–Khand reactions of functionalized allenes with different alkynes give cyclopentenones with generally high regio- and stereoselectivities. The allenes react through their external double bonds, giving cyclopentenones with exocyclic double bond at their β positions and predominantly with E stereochemistry. Some intramolecular reactions with allenynes connected through aromatic rings are described. These give the corresponding heterocycles with moderate to good yields.

DOI: 10.1002/ejoc.200701038 

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