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。
Transition-Metal-Catalyzed Regioselective Alkylation of Indoles with Alcohols
Pd/C and RuCl2(PPh3)3/DPEphos effectively catalyzed the alkylation of indole with alcohols to give 3‐substituted indoles selectively. Various types of substrates were examined and were found to give the corresponding 3‐substituted indoles in up to 99 % yield. Under different reaction conditions, RuCl2(PPh3)3/DPEphos catalyzed the selective formation of bis(3‐indolyl)phenylmethane derivatives.
Efficient Condensation Reactions of Electron-Rich Arenes with Aldehydes and Enals Promoted by Gold(III) Chloride: Practical Synthesis of Triaryl- and Triheteroarylmethanes and Related Compounds
作者:Vijay Nair、N. Vidya、K. Abhilash
DOI:10.1055/s-2006-950209
日期:2006.11
Electron-rich arenes undergo gold(III) catalyzed condensation reactions with aldehydes and enals to afford bis- and tris-addition products, respectively, in high yields.
Photoacid-Catalyzed Friedel–Crafts Arylation of Carbonyls
作者:Zena M. Salem、Jason Saway、Joseph J. Badillo
DOI:10.1021/acs.orglett.9b02841
日期:2019.11.1
In this report, we demonstrate that visible-light-induced thiourea photoacids catalyze C–C bond-forming reactions. Upon photoirradiation, Schreiner’s thiourea [(N,N′-bis[3,5-bis(trifluoromethyl)phenyl]-thiourea] catalyzes the double Friedel–Crafts addition of indoles to aldehydes and isatins to form the corresponding triarylmethanes and 3,3′-diarylindolin-2-ones. This protocol is amenable to a wide