作者:Fei Ding、Mark T. Valahovic、Joseph M. Keane、Mitchell R. Anstey、Michal Sabat、Carl O. Trindle、W. Dean Harman
DOI:10.1021/jo030318k
日期:2004.4.1
Dihapto-coordinated naphthalene complexes of the form TpRe(CO)(L)(eta(2) -naphthalene) (L = PMe3, pyridine, or 1-methylimidazole) undergo electrophilic addition with dimethoxymethane and with various Michael acceptors to generate 1H-naphthalenium species. These naphthalenium. complexes undergo intra- or intermolecular nucleophilic addition reactions with stabilized enolates, silyl ketene acetals, or enols to form the corresponding dihydronaphthalene complexes. Oxidative decomplexation generates the free dihydronaphthalene. When a resolved form of the rhenium dearomatization agent is used, these reactions can be performed enantioselectively. DFT calculations provide a useful guide in explaining the observed stereochemistry. Depending on reaction conditions, a Michael-Michael ring-closure sequence (MIMIRC) or a net [2 + 4] cycloaddition with the bound naphthalene is also observed, and the corresponding tricyclic molecules can be removed from the metal in high yield.