Indium-HI-mediated one-pot reaction of 1-(2-arylethynyl)-2-nitroarenes to 2-arylindoles
摘要:
While 1-(2-arylethynyl)-2-nitroarenes were reduced to 2-(2-arylethynyl)anilines in the presence of indium and InCl3 in THF/H2O (v/v = 5/1) at 50 degrees C, 1-(2-arylethynyl)-2-nitroarenes were reductively cyclized to 2-arylindoles with good yields in the presence of indium and aqueous HI in benzene. (C) 2008 Elsevier Ltd. All rights reserved.
On water: iodine-mediated direct construction of 1,3-benzothiazines from <i>ortho</i>-alkynylanilines by regioselective 6-<i>exo-dig</i> cyclization
作者:Kapil Mohan Saini、Rakesh K. Saunthwal、Shiv Kumar、Akhilesh K. Verma
DOI:10.1039/c9ob00128j
日期:——
Herein, we report the 6-exo-dig ring closure of ortho-alkynylanilines with readily available aroyl isothiocyanate. An environmentally benign, metal- and base-free, iodine promoted cascade synthesis of highly functionalized (benzo[1,3]thiazin-2-yl)benzimidic acids has been accomplished via in situ generated ortho-alkynylthiourea. The established methodology employs the abundant chemical feedstock of
Acid-Promoted Intramolecular Decarbonylative Coupling Reactions of Unstrained Ketones: A Modular Approach to Synthesis of Acridines and Diaryl Ketones
作者:Ganesh Kumar Dhandabani、Chia-Ling Shih、Jeh-Jeng Wang
DOI:10.1021/acs.orglett.0c00304
日期:2020.3.6
we reported Lewis acid- or Brønsted acid-promoted intramolecular C(sp2)-C(sp2) bond cleavage and a novel C(sp2)-C(sp2) bond-forming cascade reaction to synthesize the acridine motif. The metal-free oxidation of the alkyne motif generated the in situ ketone group extracted via a decarbonylation reaction. The mechanistic studies revealed that the electrophilic N-iodo species triggered key decarbonylation
Cross-coupling reactions using porous multipod Cu<sub>2</sub>
O microcrystals as recoverable catalyst in aqueous media
作者:Lin Tang、Chaoting Wu、Qiyan Hu、Qian Li、Wu Zhang
DOI:10.1002/aoc.3980
日期:2018.1
Porous multipod Cu2O microcrystals were found to be an efficient, highly recyclable and eco‐friendly catalyst for the cross‐coupling reactions of arylhalides and terminalalkynes with high yields in aqueous media. Noteworthy, the Cu2O catalyst can be reused for several times without significant decrease in catalytic activity.
HOAc catalyzed three-component reaction for the synthesis of 3,3′-(arylmethylene)bis(1<i>H</i>-indoles)
作者:Heng Li、Yan Zhu、Cong Jiang、Jia Wei、Ping Liu、Peipei Sun
DOI:10.1039/d2ob00395c
日期:——
catalyzed three-component reaction of 2-(arylethynyl)anilines with arylaldehydes has been achieved, which leads to the generation of 3,3′-(arylmethylene)bis(1H-indoles) with good to excellent yields and high regioselectivity under transition-metal-free conditions. Four new C–C and C–N bonds were effectively formed in a one-pot procedure. Subsequent research on the reaction mechanism indicated that the
Indium-HI-mediated one-pot reaction of 1-(2-arylethynyl)-2-nitroarenes to 2-arylindoles
作者:Ji Sook Kim、Joon Hee Han、Jung June Lee、Young Moo Jun、Byung Min Lee、Byeong Hyo Kim
DOI:10.1016/j.tetlet.2008.04.032
日期:2008.6
While 1-(2-arylethynyl)-2-nitroarenes were reduced to 2-(2-arylethynyl)anilines in the presence of indium and InCl3 in THF/H2O (v/v = 5/1) at 50 degrees C, 1-(2-arylethynyl)-2-nitroarenes were reductively cyclized to 2-arylindoles with good yields in the presence of indium and aqueous HI in benzene. (C) 2008 Elsevier Ltd. All rights reserved.