title: Chemistry of acronycine. VIII. Selective synthesis of dimers and trimers of noracronycine and related compounds.
abstract: Improved synthetic procedures for the formation of a number of dimeric derivatives of noracronycine (2) are described based on acid-catalyzed reactions in methanolic HCl or methanolic H2SO4. A detailed analysis of their high-field proton nmr spectral characteristics is presented. The synthesis and structure determination of a new trimer of noracronycine (2) possessing the linear-angular-angular structure (15) is described.
mesh_terms: D000175:Acronine / Q000031:analogs & derivatives / Q000138:chemical synthesis*; D000470:Alkaloids / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy
chemical_list: D000470:Alkaloids; C046848:noracronycine; D000175:Acronine