Polycyclic Hydroxyquinones. Part 29. Regioselective Reactions of 5-sulphur-substituted furan-2(5H)-one anions with naphthoquinone monoketals. Application to the synthesis of anthracyclinone precursors
afford exclusively the C-5 substituted Michael adducts in good yield. The annelation reactions of the anions generated from furanones 30 and 33 with naphthoquinone monoketals 11 and 12 lead to 2-sulphur-substituted 1,4-anthraquinones 32, 35 and 36. Diels-Alder reaction of the 1,4-anthraquinones 41 and 42 with (E)-1,3-bis[(trimethylsilyl)oxy]buta-1,3-diene (37) affords ABCD tetracyclic systems related
Pseudoesters and Derivatives. Part 38. 1,3-Dipolar Cycloadditions of Aryl Azides and an Aziridine, via Azomethine Ylide, to 2(5H)-Furanones Substituted at the 5-Position by Methoxy and Sulfur Bearing Group
作者:M. Carmen Paredes、Gemma Gonzalez、M. Victoria Martín
DOI:10.3987/com-99-s15
日期:——
Farina, F.; Martin, M. V.; Guerenu, A. M. Martinez de, Anales de Quimica, 1995, vol. 91, # 1-2, p. 74 - 82
作者:Farina, F.、Martin, M. V.、Guerenu, A. M. Martinez de、Ortego, J. L.