Synthesis and biological evaluation of (3,4,5-trimethoxyphenyl)indol-3-ylmethane derivatives as potential antivascular agents
摘要:
Combretastatin A-4 (CSA-4), a stilbene derivative, is a potent vascular disrupting agent (VDA) with the structural requirement of a cis-configuration to maintain a molecular geometry and a correct orientation of both phenyl groups. A series of indolic analogues of CSA-4 was synthesized by means of an efficient strategy. Six compounds (20b, 25b-27b, 32b, and 35b) were identified as potent inhibitors of tubulin polymerization and also displayed cytotoxic activities on B16 melanoma cells at a nanomolar level. Both activities were well correlated with the ability to induce morphological changes of EA-hy 926 endothelial cells. In conclusion, the cis-stilbene skeleton of CSA-4 could conveniently be replaced by the 3-aroylindolic moiety, thus avoiding any isomerization leading to inactive trans compounds. (c) 2006 Elsevier Ltd. All rights reserved.
Iron-Catalyzed Direct C3-Benzylation of Indoles with Benzyl Alcohols through Borrowing Hydrogen
作者:Giovanni Di Gregorio、Michele Mari、Francesca Bartoccini、Giovanni Piersanti
DOI:10.1021/acs.joc.7b01603
日期:2017.8.18
We present the coupling of primary and secondary benzylalcohols with indoles to form 3-benzylated indoles and H2O that is catalyzed, for the first time, by a complex of earth-abundant iron. This transformation accommodates a variety of substrates and is distinguished by its operational simplicity, sustainability, high functional-group tolerance, and amenability to gram-scale synthesis. On the basis
Palladium-Catalyzed, Modular Synthesis of Highly Functionalized Indoles and Tryptophans by Direct Annulation of Substituted <i>o</i>-Haloanilines and Aldehydes
作者:Yanxing Jia、Jieping Zhu
DOI:10.1021/jo061471s
日期:2006.9.1
One-pot synthesis of indoles by a palladium-catalyzed annulation of ortho-haloanilines and aldehydes has been developed. Coupling of ortho-iodoaniline with aldehyde is realized under mild ligandless conditions [Pd(OAc)2, DABCO, DMF, 85 °C], whereas X-Phos is found to be the ligand of choice for coupling reactions involving ortho-chloroanilines/ortho-bromoanilines and aldehydes. A variety of ortho-haloanilines
Photocatalytic Redox-Neutral Approach to Diarylmethanes
作者:Guozhe Guo、Yong Yuan、Xiazhen Bao、Xuehui Cao、Tongzhi Sang、Jiayuan Wang、Congde Huo
DOI:10.1021/acs.orglett.1c02523
日期:2021.9.3
reaction of indole-3-acetic acid NHPI esters with indoles using a Ru photosensitizer to deliver a wide range of symmetrical and unsymmetrical 3,3′-bisindolylmethane derivatives. Furthermore, the reaction is readily adapted to the preparation of a wide variety of diarylmethane derivatives.
Cobalt-catalysed CH-alkylation of indoles with alcohols by borrowing hydrogen methodology
作者:Bei Zhou、Zhuang Ma、Asma M. Alenad、Carsten Kreyenschulte、Stephan Bartling、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1039/d2gc00469k
日期:——
interesting class of heterocyclic compounds widely used in organic synthesis and medicinal chemistry. Key for this synthesis is the use of specific cobalt-nanoparticles supported on N-doped carbon, which were conveniently prepared by the pyrolysis of a templated material generated in situ by mixing cobalt-nitrate, zinc-nitrate, 2,6-diaminopyridine, and colloidal silica, and subsequent removal of silica
报道了吲哚与醇的一般多相钴催化 CH-烷基化。利用这种直接的借氢方法,一系列取代和官能化的吲哚很容易与包括甲醇在内的苄醇、杂环醇和脂肪醇偶联,以制备 >65 个取代的吲哚,产率从良好到优异。所得产物代表了广泛用于有机合成和药物化学的一类有趣的杂环化合物。该合成的关键是使用负载在 N 掺杂碳上的特定钴纳米颗粒,这些纳米颗粒是通过混合硝酸钴、硝酸锌、2,6-二氨基吡啶和胶体二氧化硅,然后除去二氧化硅。
HFIP-mediated C-3-alkylation of indoles and synthesis of indolo[2,3-<i>b</i>]quinolines & related natural products
作者:Auqib Rashid、Waseem I. Lone、Preeti Dogra、Showkat Rashid、Bilal A. Bhat
DOI:10.1039/d4ob00414k
日期:——
An expeditious metal free C-3 alkylation of indoles and its NIS-mediated deviation to indolo[2,3-b]quinolines is reported. This protocol, executed in aqueous HFIP has broad substrate scope and is well inclined towards the ideas of sustainable chemistry. Applications of these strategies in accessing bioactive natural products like vibrindole, norcryptotakeine, neocryptolepine and indenoindolone scaffolds