Convenient and Versatile Synthesis of Spiro(furan-2,3-indol[2]ones) and Spiro(pyran-2,3-indol[2]ones)
作者:Mario Smet、Chantal Van Oosterwijck、Kristof Van Hecke、Luc Van Meervelt、Annelies Vandendriessche、Wim Dehaen
DOI:10.1055/s-2004-832829
日期:——
Novel functionalized spiro-3-oxindoles of potential use for the synthesis of natural product analogues and pharmaceutically active compounds were prepared from substituted isatins by a convenient and versatile base-catalyzed condensation and ring-closure reaction. Moreover, a side product consisting of an at present unknown bicyclic skeleton has been isolated.