Cobalt carbonyl-mediated carbocyclizations of enynes: Generation of bicyclooctanones or monocyclic alkenes

…, LVR Boñaga, JA Wright, C Hirosawa

Index: Krafft, Marie E.; Bonaga, Llorente Vicente R.; Wright, James A.; Hirosawa, Chitaru Journal of Organic Chemistry, 2002 , vol. 67, # 4 p. 1233 - 1246

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Citation Number: 40

Abstract

Depending on the thermolytic conditions, dicobalthexacarbonyl-complexed enynes underwent cyclizations to provide different carbocyclic frameworks. Bicyclopentanones were formed from enyne-Co2 (CO) 6 complexes, or from enynes that were treated with Co2 (CO) 8, or more effectively, with Co4 (CO) 12 in an alcoholic solvent under a H2 or N2 atmosphere. This transformation proceeded via a sequential cyclocarbonylation and 1, 4- ...