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- W4246991911 abstract "13C nmr spectral data of the parent substance pyrido[2,3-b]pyrazine and several of its derivatives (containing one or more chloro, amino, oxo, bromo, fluoro, phenyl, methyl, hydrazino or t-butyl substituents) are reported. The 13C nmr spectrum of the parent substance has been assigned conclusively by 13C-labelling. Additionally we proved, the existence of anionic 1:1 σ-adducls i.e., 3-amino-3,4-dihydropyrido[2,3-b]pyrazine, the formation of 3-amino-2-t-butyl-6-chloro-3,4-dihydropyrido[2,3-b]pyrazinide ion and by 1H nmr spectroscopy 2-amino-1,2-dihydro-3-phenylpyrido[2,3-b]pyrazinide ion. The 13C nmr data of the cation of the dihydrale 2,3-dihydroxy-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine, present in a solution of the parent compound in N hydrochloric acid, are given." @default.
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- W4246991911 date "1979-03-01" @default.
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- W4246991911 title "Nuclear magnetic resonance data of pyrido[2,3-B] pyrazines and their σ-adducts with amide ion and water" @default.
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- W4246991911 doi "https://doi.org/10.1002/jhet.5570160221" @default.
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