Stereoselective Palladium-Catalyzed Carboaminoxylations of Indoles with Arylboronic Acids and TEMPO
作者:Sylvia Kirchberg、Roland Fröhlich、Armido Studer
DOI:10.1002/anie.200901072
日期:2009.5.25
Indoles are not indolent: Various indoles react with arylboronic acids chemodivergently. CH arylation of free indole and N‐methylindole gives the corresponding C(2)‐arylated indoles A whereas N‐acylated, N‐benzoylated, and N‐Boc‐protected indoles provide the corresponding arylcarboaminoxylated products B with excellent diastereoselectivity in good to excellent yields.
A novel microwave-irradiated solvent-free 3-acylation of indoles on alumina
作者:Qiu Yu Lai、Rong Su Liao、Shao Yong Wu、Jia Xin Zhang、Xin Hong Duan
DOI:10.1039/c3nj00854a
日期:——
A simple and efficient 3-acylation of indoles under microwave-heated and solvent-free conditions is developed. This general procedure uses neutral Al2O3 as a new, green and reusable catalyst giving good to high yields within short reaction times. Utilizing such an environmentally-benign methodology, a variety of indoles bearing electron-releasing or electron-withdrawing groups were conveniently acylated.
Visible‐Light‐Enabled Multicomponent Cascade Transformation from Indoles to 2‐Azidoindolin‐3‐yl 2‐Aminobenzoates
作者:Ling‐Ling Zhang、Meng‐Meng Xu、Wen‐Bin Cao、Xiao‐Ping Xu、Shun‐Jun Ji
DOI:10.1002/adsc.202000637
日期:2020.8.4
The synthesis of 2‐azido‐1‐benzoylindolin‐3‐yl2‐benzamidobenzoate commencing from (1H‐indol‐1‐yl)(phenyl)methanone and trimethylsilyl azide (TMSN3) under oxygen atmosphere is described in this paper. This transformation proceeds via a sequential dearomatization and ring‐opening cascade reaction of indoles in a cascade manner.
Highly Regioselective C2-Alkenylation of Indoles Using the <i>N</i>-Benzoyl Directing Group: An Efficient Ru-Catalyzed Coupling Reaction
作者:Veeranjaneyulu Lanke、Kandikere Ramaiah Prabhu
DOI:10.1021/ol4011486
日期:2013.6.7
A highly regioselective alkenylation of indole at the C2-position has been achieved using the Ru(II) catalyst by employing a directing group strategy. This strategy offers rare selectivity for the alkenylation N-benzoylindole at the C-2 position in the presence of the more active C3- and C7-position of indole and the ortho-positions of the benzoyl protecting group. A simple deprotection of the benzoyl
Nickel-Catalyzed Cross-Electrophile Coupling Reactions for the Synthesis of <i>gem</i>-Difluorovinyl Arenes
作者:Baojian Xiong、Ting Wang、Haotian Sun、Yue Li、Søren Kramer、Gui-Juan Cheng、Zhong Lian
DOI:10.1021/acscatal.0c03993
日期:2020.11.20
A nickel-catalyzed cross-electrophile couplingreaction between (hetero)aryl bromides and 2,2-difluorovinyl tosylate is presented. This protocol provides facile incorporation of the gem-difluorovinyl moiety in organic molecules. The method features mild reaction conditions, good functional group tolerance, and excellent yields. Furthermore, mechanistic experiments and DFT studies indicate a Ni(0)/Ni(II)