One-pot total synthesis of streptindole, arsindoline B and their congeners through tandem decarboxylative deaminative dual-coupling reaction of amino acids with indoles
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
FeCl<sub>3</sub>·6H<sub>2</sub>O as a Mild Catalyst for Nucleophilic Substitution of Symmetrical Bis(indoyl)methanes
作者:Chayamon Chantana、Jaray Jaratjaroonphong
DOI:10.1021/acs.joc.0c02466
日期:2021.2.5
In this paper, unsymmetrical bis(indolyl)methane (BIM) and 3-alkylindole derivatives are smoothly synthesized from symmetrical BIMs with a variety of nucleophiles including heteroaromatic/aromatic compounds, allylsilane and alkynylsilane. FeCl3·6H2O is found to be a mild and highly effective catalyst for this nucleophilic substitution reaction in which N-methyl-2-phenylindole behaves as a good leaving
Facile access to bis(indolyl)methanes by copper-catalysed alkylation of indoles using alcohols under air
作者:Ngoc-Khanh Nguyen、Duc Long Tran、Tran Quang Hung、Tra My Le、Nguyen Thi Son、Quang Thang Trinh、Tuan Thanh Dang、Peter Langer
DOI:10.1016/j.tetlet.2021.152936
日期:2021.3
of many alkaloid and bioactive compounds (anti-inflammatory, anticancer, antiobesity, antimicrobial, etc.). Herein, we have reported an air stable and convenient Cu(OAc)2 catalyst for alkylation of indoles with alcohols to give bis(3-indolyl)methanes in very good yields.
nonsymmetrical bis(indolyl)methanes (BIMs) through transindolylation of readily available symmetrical 3,3′-BIMs with various indoles catalyzed by silica-supported sulfuricacid has been established. This approach not only provides a useful strategy for the synthesis of structurally diverse BIMs, but also provides examples of nucleophilic substitution of BIMs with aromatic and nonaromatic π-systems
Glycerin and CeCl3·7H2O: a new and efficient recyclable medium for the synthesis of bis(indolyl)methanes
作者:Claudio C. Silveira、Samuel R. Mendes、Francieli M. Líbero、Eder J. Lenardão、Gelson Perin
DOI:10.1016/j.tetlet.2009.08.062
日期:2009.11
Glycerin and CeCl3 center dot 7H(2)O were successfully used in recyclable catalytic system for the synthesis of several bis(indolyl)methanes in good to excellent yields through the reaction of indoles with aldehydes. The method is applicable to aliphatic and aromatic aldehydes, and the mixture of glycerin and CeCl3-7H(2)O can be reused up to five times without special treatment and with comparable yields. (C) 2009 Elsevier Ltd. All rights reserved.