Ruthenium catalyzed remote C4-selective C–H functionalisation of carbazoles <i>via</i> σ-activation
作者:Jamie A. Leitch、Callum J. Heron、Janette McKnight、Gabriele Kociok-Köhn、Yunas Bhonoah、Christopher G. Frost
DOI:10.1039/c7cc07606a
日期:——
We report the C4-selective C–H alkylation of carbazole derivatives furnished with a pyrimidine directing group at N9. This was realized using ruthenium catalyzed σ-activation methodology, whereby C–H activation at C1 enables the interaction of this ruthenacycle, at the para position to the metal center, with tertiary alkyl radicals.
On the synthesis and isolation of chlorocarbazoles obtained by chlorination of carbazoles
作者:Sergio M. Bonesi、Rosa Erra-Balsells
DOI:10.1002/jhet.5570340327
日期:1997.5
Carbazole (1) undergoes electrophilic aromatic substitution with various chlorinating reagents. Although 3-chlorocarbazole (1b), 3,6-dichlorocarbazole (1d) and 1,3,6,8-tetrachlorocarbazole (1f) obtained by chlorination of carbazole were isolated and characterized sometime ago, 1-chlorocarbazole (1a), 1,6-dichlorocarbazole (1c) and 1,3,6-trichlorocarbazole (1e) had never been isolated from the reaction