Divergent Dehydrogenative Coupling of Indolines with Alcohols
作者:Xue Jiang、Weijun Tang、Dong Xue、Jianliang Xiao、Chao Wang
DOI:10.1021/acscatal.6b03667
日期:2017.3.3
The dehydrogenativecoupling of indolines with alcohols catalyzed by an iridium complex has been achieved to afford both N- and C3-alkylated indoles selectively, by simply changing the addition time of a base additive. The iridacycle catalyst plays multiple roles in these reactions, which dehydrogenates both amines and alcohols and catalyzes the coupling reactions. Mechanistic studies reveal that a
Manganese-Catalyzed Regioselective Dehydrogenative C- versus N-Alkylation Enabled by a Solvent Switch: Experiment and Computation
作者:Jannik C. Borghs、Viktoriia Zubar、Luis Miguel Azofra、Jan Sklyaruk、Magnus Rueping
DOI:10.1021/acs.orglett.0c01270
日期:2020.6.5
base metal-catalyzed regioselective dehydrogenative alkylation of indolines using readily available alcohols as the alkylating reagent is reported. A single air- and moisture-stable manganese catalyst provides access to either C3- or N-alkylated indoles depending on the solvent used. Mechanistic studies indicate that the reaction takes place through a combined acceptorless dehydrogenation and hydrogen
The ligand-free palladium-catalyzed C3-cyanation of indoles via direct C–H functionalization was achieved. This protocol, utilizing CH3CN as a green and readily available cyanide source, produced the desired products in moderate to good yields through transition-metal-catalyzed C–CN bond cleavage.
Brønsted Acid-Catalyzed Decarboxylative Redox Amination: Formation of <i>N</i>-Alkylindoles from Azomethine Ylides by Isomerization
作者:Hui Mao、Sichang Wang、Peng Yu、Huiqing Lv、Runsheng Xu、Yuanjiang Pan
DOI:10.1021/jo102218v
日期:2011.2.18
decarboxylative redox amination involving aldehydes with 2-carboxyindoline for the synthesis of N-alkylindoles is described. The decarboxylative condensations of aldehydes with 2-carboxyindoline produce azomethine ylides in situ, which then transform into N-alkylindoles by isomerization.