Pauson-Khand Carbonylative Cocyclizations of Acetylenes with Cyclopropylallenes

Mohammed Ahmar; Mario Knoke; Armin de Meijere; Bernard Cazes

doi:10.1055/s-2007-965882

PAPER

Pauson-Khand Carbonylative Cocyclizations of Acetylenes with Cyclopropylallenes [1]

Mohammed Ahmar^a, Mario Knoke^b, Armin de Meijere*^b, Bernard Cazes*^a
^a Université Claude Bernard-LYON, UMR-CNRS 5181, Laboratoire de Chimie Organique 1, Bât. CPE-Lyon, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
Fax: +33(4)72431214; e-Mail: cazes@univ-lyon1.fr;
^b Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
Fax: +49(551)399472; e-Mail: ameijer1@gwdg.de;

Abstract

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Abstract

The Pauson-Khand-like carbonylative cocyclizations of alkynes with cyclopropylallene and with 1,3-dicyclopropylallene occur regioselectively and lead to 4-(cyclopropylmethylene)cyclopentenones (43-59% for six examples).

Key words

cobalt complexes - cycloaddition - cyclopropylallenes - cyclopentenones - small rings

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References

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