A number of visnagin-9-sulfonamides 1-3 have been prepared. In two instances side-products have been isolated in which the γ-pyrone ring is opened. All compounds were characterized by high-field 1H and 13C nmr and mass spectra.
已经制备了许多visnagin-9-磺酰胺1-3。在两种情况下,已经分离出副产物,其中打开了
γ-吡喃酮环。所有化合物均通过1 H和13 C nmr高场和质谱表征。