Synthesis 2007(3): 442-446  
DOI: 10.1055/s-2007-965882
PAPER
© Georg Thieme Verlag Stuttgart · New York

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

Mohammed Ahmara, Mario Knokeb, 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;
Further Information

Publication History

Received 14 July 2006
Publication Date:
12 January 2007 (online)

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).