摘要:
The alpha, alpha'-annelation of the enamine of 1,3-hydro-2-phenalenone with methyl alpha-(bromomethyl)acrylate affords an aromatic bicyclic framework, methyl 8,9,10,11-tetrahydro-7,11-methano-12-keto-7H-cyclooocta(de)naphthalene-9-endo-carboxylate having the ester function positioned over the aromatic ring. The acid derivatives of this framework dimerize affording a ''sandwich'' structure with the H-bonded carboxyl groups between parallel naphthalene rings. The dimeric association can be easily probed using both NMR and fluorescence techniques. (C) 1997 Elsevier Science Ltd.