A new synthetic method for triazatruxenes from indoles is developed using N-bromosuccinimide (NBS) as a user-friendly reagent. Major reaction parameters including the amount of NBS, substrate concentration, temperature, addition rate and addition method are investigated. Additional experiments are also conducted in order to gain access toward the reaction mechanism. Compared to the use of Br2 in the
Acid-Promoted Competing Pathways in the Oxidative Polymerization of 5,6-Dihydroxyindoles and Related Compounds: Straightforward Cyclotrimerization Routes to Diindolocarbazole Derivatives
indolylindoline 17 and the open trimer 18 can be isolated. Similar oxidation of the N-methyl (1b) and O,O-dimethyl (1c) derivatives of 1a, as well as of 5-methoxyindole (9b), 6-hydroxyindole (14a), and 6-benzyloxyindole (14b), afforded the corresponding diindolocarbazoles 5b and 6b, 5c and 6c, 10, 16, and the related tetramer 15 in up to 70% overall yield, whereas 5,6-diacetoxyindole (1d), 5-hydroxyindole (9a)
Cu-Catalyzed Radical Addition and Oxidation Cascade: Unsymmetrical Trimerization of Indole to Access Isotriazatruxene
作者:Ting Deng、Wenxin Yan、Xiaoyu Liu、Guizhimeng Hu、Weilie Xiao、Shuai Mao、Jun Lin、Yinchun Jiao、Yi Jin
DOI:10.1021/acs.orglett.2c00180
日期:2022.2.25
Herein we describe a Cu-catalyzed radical addition and oxidation cascade reaction for the chemo/regioselective synthesis of unsymmetrical indole trimers (isotriazatruxenes, i-TATs) from easily available starting materials. The i-TATs exhibited blue fluorescence in various solvents with different fluorescence intensities and showed good structural expansibility. A wider range of products could be used
在这里,我们描述了一种铜催化的自由基加成和氧化级联反应,用于从容易获得的起始材料化学/区域选择性合成不对称吲哚三聚体(异三氮杂环己烯, i -TAT)。i- TATs在不同荧光强度的各种溶剂中呈现蓝色荧光,并表现出良好的结构扩展性。通过开发合适的衍生物,可以将更广泛的产品用于光电材料。