Cyclopentadienylcobalt-Mediated
Intermolecular Cycloaddition of α,ω-Diynes
to (Cyclo)alkenes: Synthesis of Linearly Fused Oligocycles and Extension
to Enantiomerically Pure (6aR,10aR)-Dihydroanthracyclinones
Corinne Auberta, Vincent Gandonb, Sangdon Hanc, Barry M. Johnsonc, Max Malacriaa, Sten Schömenauerc, K. Peter C. Vollhardt*c, Glenn D. Whitenerc a UPMC Université Paris 06, Institut Parisien de Chimie Moléculaire (UMR
CNRS 7201), 4 place Jussieu, C. 229, 75005 Paris,
France b Université Paris-Sud, UMR CNRS 8182, 91405 Orsay, France c Department of Chemistry, University of California at Berkeley, Berkeley,
California 94720-1460, USA Fax: +1(510)6435208; e-Mail: kpcv@berkeley.edu;