E. E. Sirotkina, N. Moskalev, I. G. Shabotkin
May 1, 1984
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Journal
Chemistry of Heterocyclic Compounds
Abstract
It is shown that the trifluoroacetylation of 9-methylcarbazole proceeds regio-specifically in the 3 position of the ring. 1,1,1-Tris(9-methyl-3-carbazolyl)-2,2,2-trifluoroethane and 1,1,1′,1′-tetrakis(9-methyl-3-carbazolyl)-2,2,2,2′,2′,-2′-hexafluorodiethyl ether were also isolated from the reaction mixture. Bis(trifluoroacetyl) derivatives were not detected. Only a 3-trifluoroacetyl derivative is formed when the reaction is carried out by heating in the presence of pyridine.