Water mediated trapping of active methylene intermediates generated by IBX-induced oxidation of Baylis–Hillman adducts with nucleophiles
作者:Jia-Neng Tan、Haoquan Li、Yanlong Gu
DOI:10.1039/c0gc00274g
日期:——
Baylis–Hillman adduct with IBX. The generated product, a methyleneintermediate, could be trapped in situ by many nucleophiles in water, such as styrenes, β-dicarbonyl compounds, benzamide and less reactive indoles. This strategy offers an alternative way to methylenylation of β-dicarbonyl compounds with formaldehyde for the formation of a methyleneintermediate, thus allows the use of some nucleophiles that
Abstract Baylis–Hillman adducts were oxidized by iodoxybenzoic acid (IBX) to 2-methylene-1,3-dicarbonyl compounds, which can act as oxodiene to react with electron-richalkenes to generate a variety of oxo Diels–Alder adducts in good yields. GRAPHICAL ABSTRACT