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.
Rhodium-Catalyzed Regioselective C7-Functionalization of <i>N</i>
-Pivaloylindoles
作者:Lanting Xu、Chao Zhang、Yupeng He、Lushi Tan、Dawei Ma
DOI:10.1002/anie.201508117
日期:2016.1.4
efficient rhodium‐catalyzed method for directCH functionalization at the C7 position of a wide range of indoles has been developed. Good to excellent yields of alkenylation products were observed with acrylates, styrenes, and vinyl phenyl sulfones, whereas the saturated alkylation products were obtained in good yield with α,β‐unsaturated ketones. Both the N‐pivaloyl directing group and the rhodium catalyst
An Efficient Procedure for the Deprotection of <i>N</i>-Pivaloylindoles, Carbazoles and β-Carbolines with LDA
作者:J. Menéndez、Carmen Avendaño、J. Sánchez
DOI:10.1055/s-2004-836060
日期:——
Treatment of variously substituted indoles with 2 equivalents of LDA at 40-45 °C led to their fast and efficient deprotection. This method was also extended to N-pivaloylcarbazoles and β-carbolines.