Abstract
It is shown that 1-acetyl and 1-chloroacetyl derivatives are formed in the Vilsmeier acylation of 3H-pyrrolo[2,3-c]carbazole. The 3,6-diacetyl derivative is formed by the action of Ac2O without a catalyst, whereas the presence of catalytic amounts of H3PO4 leads to 1,6-diacetyl-3H-pyrrolo[2,3-c]carbazole. Only one reaction product, viz., the 9-acetyl derivative, is formed when AlCl3 is used as the catalyst, while a mixture of acylation products was obtained in the presence of SnCl4.
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See [1] for Communication 3.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 497–500, April, 1980.
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Sikharulidze, M.I., Khoshtariya, T.E., Kurkovskaya, L.N. et al. Pyrrolocarbazoles. 4. Acetylation of 3H-pyrrolo[2,3-c]carbazole. Chem Heterocycl Compd 17, 357–360 (1981). https://doi.org/10.1007/BF00503336
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DOI: https://doi.org/10.1007/BF00503336