Magnetically recyclable CuFe2O4 catalyst for efficient synthesis of bis(indolyl)methanes using indoles and alcohols under mild condition
作者:Ngoc-Khanh Nguyen、Minh-Tuan Ha、Hoang Yen Bui、Quang Thang Trinh、Bich Ngoc Tran、Van Tuyen Nguyen、Tran Quang Hung、Tuan Thanh Dang、Xuan Hoan Vu
DOI:10.1016/j.catcom.2020.106240
日期:2021.1
Bis(3-indolyl)methanes (BIM) are highly valuable and appear in the core structure of many natural products and pharmacologically active compounds (anticancer, anti-inflammatory, antiobesity, antimetastatic, antimicrobial, etc.). Herein, we have disclosed an air stable and highly efficient CuFe2O4 heterogeneous catalyst for alkylation of indoles with alcohols to give bis(3-indolyl)methanes in very good
双(3-吲哚基)甲烷(BIM)具有很高的价值,并出现在许多天然产物和药理活性化合物(抗癌,抗炎,抗肥胖,抗肿瘤,抗微生物等)的核心结构中。在此,我们已经公开了一种空气稳定且高效的CuFe 2 O 4非均相催化剂,用于用醇将吲哚烷基化以非常好的收率得到双(3-吲哚基)甲烷。已经发现CuFe 2 O 4催化剂被磁循环至少五次而不会损失明显的催化活性。
A New Amphiphilic Brønsted Acid as Catalyst for the Friedel-Crafts Reactions of Indoles in Water
作者:Yuan Cheng、Xiongyu Ou、Jimei Ma、Linhao Sun、Zhong-Hua Ma
DOI:10.1002/ejoc.201801612
日期:2019.1.10
A designed Brønsted acid enables Friedel–Crafts alkylation of indoles in water, whose hydrophobic aggregations of fluorocarbon chains, along with phenyl ring, protected acid sites from bulk water and enriched the substrates. The amphiphilic structure has been proven crucial for the high catalytic efficiency.
Synthesis of Bis(indolyl)methanes through an Alkylation Reaction of Indoles with Sodium Alkoxides
作者:Bingwei Zhou、Xue Chen、Yunkui Liu、Hongwei Jin
DOI:10.1055/a-1668-9910
日期:2022.3
We describe an alkylation reaction of indoles with sodium alkoxides for the synthesis of bis(indolyl)methanes. 1-Tetralone proved to be an efficient hydrogen acceptor, thus avoiding the use of precious transition metals such as Ru and Ir. This reaction features transition-metal-free conditions, uses readily available starting materials, and can be conducted on a gram scale.
Preparation of immobilized hexamine on Fe3O4/SiO2 core/shell nanoparticles: a novel catalyst for solvent-free synthesis of bis(indolyl)methanes
作者:Sahar Kangari、Issa Yavari
DOI:10.1007/s11164-016-2590-z
日期:2016.12
VSM. According to SEM pictures, the nanoparticles are mostly spherical in shape, and their size is approximately 46 nm. The catalytic performance of these magnetic nanoparticles for the synthesis of bis(indolyl)methanes was investigated. The catalyst was readily recycled by the use of an external magnetic field and can be reused four times without significant loss of activity. Graphical Abstract
have evaluated five bis(indolyl)phenylmethane derivatives to reduce amyloidfibril formation by hen egg white lysozyme (HEWL) and its associated cytotoxicity. HEWL is a widely used model system to study the fundamentals of amyloidfibril formation and is heterologous to human lysozyme, which forms amyloidfibrils in a familial form of systemic amyloidosis. HEWL aggregation was tested in the presence and