We report the first synthesis of new condensed benzimidazole derivatives – 5H,12H-benzo[4,5]imidazo[1,2-a]pyrrolo[1,2-d]pyrazines, based on furan ring transformation in 1-[(5-alkylfuran-2-yl)methyl]-2-(chloromethyl)benzimidazoles. Two routes are presented for the formation of pyrrolopyrazine system, with different order of steps for the introduction of amino group and opening of the furan ring.
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This study received financial support from the Ministry of Education and Science of the Russian Federation (contract 4.6087.2017/BCh).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2018, 54(2), 188–196
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Stroganova, T.A., Vasilin, V.K. & Krapivin, G.D. Furan ring transformation as key stage in the synthesis of 5H,12H-benzo[4,5]imidazo[1,2-a]pyrrolo[1,2-d]pyrazines. Chem Heterocycl Comp 54, 188–196 (2018). https://doi.org/10.1007/s10593-018-2253-7
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DOI: https://doi.org/10.1007/s10593-018-2253-7