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- W2129136685 abstract "1,4-Dimethylcarbazole-3-carbaldehyde (2a) was condensed with aminoacetaldehyde diethyl acetal, and the Schiff's base was hydrogenated before conversion into the N-tosyl derivative (3a). The latter was cyclised in boiling dilute hydrochloric acid in dioxan to ellipticine [5,11-dimethyl-6H-pyrido[4,3-b]carbazole)(1a)(87%). N-Tosyl-3,4-dihydroellipticine (4) was shown to be an intermediate. Under the same conditions, m-methoxyanilinoacetaldehyde diethyl acetal (6a) gave a low yield (5%) of 6-methoxyindole, but its N-methyl derivative (6b) gave 4- and 6-methoxy-N-methylindoles in 11 and 32% yields, respectively." @default.
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- W2129136685 date "1977-01-01" @default.
- W2129136685 modified "2023-09-25" @default.
- W2129136685 title "A new approach to the synthesis of ellipticines" @default.
- W2129136685 doi "https://doi.org/10.1039/p19770001698" @default.
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