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- W2949974967 abstract "A simple one-step synthesis of 2-amino-4-aryl-5-oxo-4H-furo[3,4-b]pyran-3-carbonitriles 7 is described. It involves reaction of 2,4(3H,5H)-furandione (β-tetronic acid) (5) with arylmethylenemalononitriles 4 in basic medium. Some substituent effects are noted and the assignments of 13C-NMR spectra are discussed. Ring transformation of the furo[3,4-b]pyran 7a leads to the difuro[3,4-b:3′,4′-e]pyridine 9." @default.
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- W2949974967 date "1991-08-12" @default.
- W2949974967 modified "2023-10-02" @default.
- W2949974967 title "A novel one-step synthesis of 4H-furo[3,4-b]pyrans and a transformation into a difuro[3,4-b: 3′,4′-e]pyridine" @default.
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- W2949974967 doi "https://doi.org/10.1002/jlac.1991199101140" @default.
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