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- W2015738027 abstract "The synthesis of N1-substituted 2-amino-4,5,6,7-tetrahydroindole-3-carbonitriles 2 and 5,6,7,8-tetrahydropyrimido[4,5-b]-indoles 3–5 and their subsequent dehydrogenation to the corresponding 2-aminoindole-3-carbonitriles 8 and pyrimido[4,5-b]indoles 9, 11, 12, using DDQ in toluene or palladium on charcoal in 1-methylnaphthalene, is described. Palladium on charcoal proves to be a versatile reagent in dehydrogenation. The application of DDQ fails in the case of the 5,6,7,8-tetrahydropyrimido[4,5-b]indole-4-amines 4, 5, which are of special interest in regard of their affinity to the adenosine receptor. With sodium periodate, instead of the expected aromatization a new class of spiro-heterocycles is formed." @default.
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- W2015738027 date "1993-05-12" @default.
- W2015738027 modified "2023-10-15" @default.
- W2015738027 title "Synthesis of Substituted Indoles and Pyrimido[4,5-b]indoles by Dehydrogenation of Tetrahydroindoles and Tetrahydropyrimidoindoles" @default.
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- W2015738027 doi "https://doi.org/10.1002/jlac.199319930177" @default.
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