5H-furan-2-one in the Vilsmeier-Haack reaction. Synthesis of beta-substituted furans. Molecular structures of 3-dimethylaminomethylene-5-formyl-3H-furan-2-one and dimethylammonium 3,5-di(2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidenemethyl)furan-2-olate
Gd. Krapivin et al., 5H-furan-2-one in the Vilsmeier-Haack reaction. Synthesis of beta-substituted furans. Molecular structures of 3-dimethylaminomethylene-5-formyl-3H-furan-2-one and dimethylammonium 3,5-di(2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidenemethyl)furan-2-olate, KHIM GETERO, (1), 1999, pp. 24-34