An efficient and versatile ‘green’ catalytic system for the Buchwald–Hartwig cross-coupling reaction in water is reported. In an aqueous micellar medium, the combination of t-BuXPhos with [(cinnamyl)PdCl]2 showed excellent performance for coupling arylbromides or chlorides with a large set of amines, amides, ureas and carbamates. The method is functional-group tolerant, proceeds smoothly (30 to 50
readily available N-(2-pyridyl)anilines and commercially available α-Cl ketones through iridium-catalyzed C–H activation and cyclization is reported here. As a complementary approach to the conventional strategies for indole synthesis, the transformation exhibits powerful reactivity, tolerates a large number of functional groups, and proceeds with good to excellent yields undermildconditions, providing
Direct C–H alkylation and indole formation of anilines with diazo compounds under rhodium catalysis
作者:Neeraj Kumar Mishra、Miji Choi、Hyeim Jo、Yongguk Oh、Satyasheel Sharma、Sang Hoon Han、Taejoo Jeong、Sangil Han、Seok-Yong Lee、In Su Kim
DOI:10.1039/c5cc07767b
日期:——
The rhodium(III)-catalyzed direct functionalization of aniline C-H bonds with [small alpha]-diazo compounds is described. These transformations provide the facile construction of ortho-alkylated anilines with diazo malonates or highly substituted indoles with...
A cascade iridium-catalysed oxindolesynthesis was achieved using pyridyl-protected anilines and bis(2,2,2-trifluoroethyl) 2-diazomalonate. The developed protocol is simple and scalable, and has a broad scope and excellent regioselectivity. The pyridyl directing group can easily be removed. The method was further extended to give C-7-functionalized oxindole derivatives in a straightforward manner.
Carbene adduct of cyclopalladated ferrocenylimine-assisted synthesis of aminopyridine derivatives by the amination of chloropyridines with primary and secondary amines
作者:Bing Mu、Jingya Li、Yangjie Wu
DOI:10.1002/aoc.3026
日期:2013.9
on Buchwald–Hartwig aminations. Using 1 mol% N‐heterocyclic carbene adduct of cyclopalladated ferrocenylimine in the presence of 1.5 equiv. tBuOK as base in dioxane at 110°C offered moderate to excellent yields in the reaction of chloropyridines with primary and secondaryamines, including sterically hindered amines and alkyl amines.