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- W2053441340 abstract "Lithiation of 4-methoxy-2-pyridone with butyllithium at –78 °C occurs at the C-3 position exclusively. Subsequent reactions with MeOD, Mel, CO2, benzaldehyde or (E)-but-2-enal then lead to the corresponding C-3-substituted derivatives. In a one-pot procedure, treatment of 1,2-dihydro-4-methoxy-1-methyl-2-oxopyridine-3-carboxylic acid with ammonia in the presence of a polyphosphate buffer at 80 °C produced natural ricinine in 58% overall yield." @default.
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- W2053441340 date "1992-01-01" @default.
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- W2053441340 title "Lithiation of 4-methoxy-2-pyridones. Synthetic entry to tenellin and funiculosin, and related natural 3,5-disubstituted 4-oxy-2-pyridones" @default.
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- W2053441340 doi "https://doi.org/10.1039/p19920000067" @default.
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