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。
Green and efficient synthesis of aryl/alkylbis(indolyl)methanes using Expanded Perlite-PPA as a heterogeneous solid acid catalyst in aqueous media
Perlite-Polyphosphoric acid (EP-PPA) as a novel, efficient, recyclable and eco-benign heterogeneous catalyst has been applied for the green and rapid synthesis of aryl/alkylbis(indolyl)methanes, in water, in good to excellent yields. The catalyst was characterized by XRF, FT-IR, TGA/DTG, ICP-OES, SEM-EDX and pH analysis. Importantly, the newly synthesized heterogeneous solidacidcatalyst can be recovered
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
Halogen Bond-Catalyzed Friedel–Crafts Reactions of Aldehydes and Ketones Using a Bidentate Halogen Bond Donor Catalyst: Synthesis of Symmetrical Bis(indolyl)methanes
作者:Xuelei Liu、Shuang Ma、Patrick H. Toy
DOI:10.1021/acs.orglett.9b03578
日期:2019.11.15
The use of a halogen bond donor to catalyze Friedel-Crafts reactions of indoles with a range of aldehydes and ketones to directly produce bis(indolyl)methanes, including the natural products arsindoline A, arundine, trisindoline, and vibrindole A, is reported. The bidentate catalyst used in these reactions proved to be more effective than a monondentate analogue, a thiourea commonly used as an organocatalyst
RuCl3·3H2O Catalyzed Reactions: Facile Synthesis of Bis(indolyl)methanes under Mild Conditions
作者:Hong-En Qu、Chen Xiao、Ning Wang、Kai-Hui Yu、Qiao-Sheng Hu、Liang-Xian Liu
DOI:10.3390/molecules16053855
日期:——
RuCl3·3H2O was found to be an effective catalyst for reactions of indoles, 2-methylthiophene, and 2-methylfuran with aldehydes to afford the corresponding bis(indolyl)methanes, bis(thienyl)methanes, and bis(fur-2-yl)methanes in moderate to excellent yields. Experimental results indicated that mono(indolyl)methanol is not the reaction intermediate under these reaction conditions.