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- W2951332457 abstract "An unexpected approach to the preparation of quinoxaline and pyrido[2,3-b]pyrazine derivatives 5 is described. The reaction between 1H-indole-2,3-diones 1, 1-phenyl-2-(triphenylphosphoranylidene)ethanone (2), and benzene-1,2- or pyridine-2,3-diamines 3 proceeds in MeOH under reflux in good to excellent yields (Scheme 1 and Table). No co-catalyst or activator is required for this multi-component reaction (MCR), and the reaction is, from an experimental point of view, simple to perform. The structures of 5, 5′, and 6 were corroborated spectroscopically (IR, 1H- and 13C-NMR, and EI-MS) and were confirmed by comparison with reference compounds. A plausible mechanism for this type of reaction is proposed (Scheme 2)." @default.
- W2951332457 created "2019-06-27" @default.
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- W2951332457 date "2013-01-01" @default.
- W2951332457 modified "2023-09-25" @default.
- W2951332457 title "Unexpected Approach to the Synthesis of 2-Phenylquinoxalines and Pyrido[2,3-<i>b</i>]pyrazines<i>via</i>a Regioselective Reaction" @default.
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- W2951332457 doi "https://doi.org/10.1002/hlca.201200088" @default.
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