Starting from simple anilines and ester arylpropiolates, an efficient one-pot synthesis of 2-arylindole-3-carboxylate derivatives has been developed through copper-mediated sequential hydroamination and cross-dehydrogenative coupling (CDC) reaction. The initial hydroamination of anilines to ester arylpropiolates in benzene can proceed in a stereoselective manner to give ester (Z)-3-(arylamino)acrylates
arylnitrones and diazo compounds by C–H activation/[4 + 1] annulation with a C(N2)–C(acyl) bond cleavage is reported, and 2,3-disubstituted NH indoles are directly synthesized in up to a 94% yield. A variety of functional groups are applicable to this reaction to give the corresponding products with high selectivity. Compared to other previously reported Rh(III)-catalyzed synthesis of homologous series, this method
Palladium-Catalyzed Intramolecular Trapping of the Blaise Reaction Intermediate for Tandem One-Pot Synthesis of Indole Derivatives
作者:Ju Hyun Kim、Sang-gi Lee
DOI:10.1021/ol200045q
日期:2011.3.18
Palladium-catalyzed intramolecular N-arylative and N-alkylative/N-arylative trappings of the Blaise reaction intermediates could be a new route to construct the indole moiety in a tandem one-pot manner from nitriles.
Copper-catalyzed synthesis of 2,3-disubstituted indoles from ortho-haloanilines and β-keto esters/β-diketone
作者:Xiao-Guang Liu、Zi-Hao Li、Jian-Wei Xie、Ping Liu、Jie Zhang、Bin Dai
DOI:10.1016/j.tet.2015.12.006
日期:2016.2
Tetrazole-1-acetic acid was identified as an efficient ligand to promote copper-catalyzed domino reaction of ortho-iodo/bromo-anilines with β-keto esters/β-diketone for 2,3-disubstitutedindoles' synthesis with high yields undermildconditions. The protocol, with easy-available catalytic system, shows good substrate tolerance towards various functional groups.