Pd/C-Catalyzed Carbonylative Synthesis of 2-Aminobenzoxazinones from 2-Iodoaryl Azides and Amines
作者:Youcan Zhang、Zhiping Yin、Hai Wang、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b00966
日期:2019.5.3
palladium-catalyzed carbonylative procedure for the synthesis of 2-aminobenzoxazinones from 1-azido-2-iodobenzenes and amines has been developed. A broad range of 2-aminobenzoxazinone derivatives were prepared in moderate to excellent yields by using Pd/C as the catalyst under CO atmosphere. Notably, by using organic azides as the substrates, external oxidant usage can be successfully avoided and only forms
A self-relay rhodium(I)-catalyzed cyclization of alkyne–azides with two σ-donor/π-acceptor ligands (isonitriles and CO) to form sequentially multiple-fused heterocycle systems via tandem nitrene transformation and aza-Pauson–Khand cyclization has been developed. In this approach, an intriguing chemoselective insertion process of isonitriles superior to CO was observed. This reaction provides an alternative
具有两个σ-供体/π-受体配体(腈和CO)的自中继铑(I)催化的炔-叠氮化物的环化反应通过串联氮转化和氮杂-Pauson-Khand环化反应依次形成多重稠合杂环系统已开发。在这种方法中,观察到了一种优于CO的有趣的异腈化学选择性插入过程。该反应提供了合成功能化吡咯并[2,3- b ]吲哚支架的替代策略。
Facile and efficient synthesis of [1,4]oxazino[3,2-b]indoles and 1H-pyrazino[2,3-b]indoles through gold-catalyzed cascade cyclization of (azido)ynamides
作者:Cang-Hai Shen、Yuan Pan、Yong-Fei Yu、Ze-Shu Wang、Weimin He、Ting Li、Long-Wu Ye
DOI:10.1016/j.jorganchem.2015.01.029
日期:2015.10
[1,4]Oxazino[3,2-b]indoles as well as 1H-pyrazino[2,3-b]indoles are constructed in good to excellent yields via gold-catalyzed cascade cyclization of (azido)ynamides. The use of readily available starting materials, a simple procedure and mild reaction conditions are other significant features of this method.
通过金催化的(叠氮基)乙酰胺的环化反应,可以很好地制备[1,4]恶嗪基[3,2- b ]吲哚以及1 H-吡嗪并[2,3- b ]吲哚。使用容易获得的起始原料,简单的步骤和温和的反应条件是该方法的其他重要特征。
Synthesis of indole-fused heteroacenes by cascade cyclisation involving rhodium(<scp>ii</scp>)-catalysed intramolecular C–H amination
作者:Takanori Matsuda、Hirotaka Ito
DOI:10.1039/c8ob01837e
日期:——
heteroacenes. 2-[(2-Azidophenyl)ethynyl]anilines undergo cascade cyclisation by gold(I)/rhodium(II) relay catalysis. Control experiments show that gold(I) is an effective catalyst for the first indole cyclisation with the aniline moiety, while the second cyclisation, which involves the azide moiety, is catalysed by rhodium(II). This protocol delivers a variety of N-substituted N′-unsubstituted dihydroindoloindoles
杂蒽是有机电子学的潜在重要材料,其合成引起人们的关注。在这里,我们报告了催化合成的5,10-二氢吲哚并[3,2- b ]吲哚类杂并苯的氧化还原中性反应的发展。2-[(2-氮杂苯基)乙炔基]苯胺通过金(I)/铑(II)中继催化进行级联环化。对照实验表明,金(I)是用于第一个与苯胺部分的吲哚环化的有效催化剂,而第二个涉及叠氮化物部分的环化是由铑(II)催化的。该协议可提供多种N取代的N′-未取代的二氢吲哚并吲哚。通过碱促进的苯并呋喃环化反应,然后通过铑(II)催化的CH氨基化反应,还可以将2-[(2-氮杂苯基)乙炔基]酚转化为10 H-苯并呋喃[3,2- b ]吲哚。还报道了2-[((2-叠氮基苯基)乙炔基]联苯的相关级联环化反应。
Steric, Electronic and Conformational Synergistic Effects in the Gold(I)‐catalyzed α
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C−H Bond Functionalization of Tertiary Amines**
作者:David F. León Rayo、Ali Mansour、Wenbin Wu、Benjamin N. Bhawal、Fabien Gagosz
DOI:10.1002/anie.202212893
日期:2023.1.16
gold-catalyzed α-C−H bond functionalization of tertiary amine was achieved via the intermediacy of a reactive α-imino gold carbene. The use of a malonate group exerting electronic, steric and conformational synergistic effects was key to the success of the transformation. The tetrahydro-γ-carboline products could be subsequently oxidized to access structural motifs found in bioactive natural products.