Indolocarbazole-Based Ligands for Ladder-Type Four-Coordinate Boron Complexes
摘要:
A novel class of pi-conjugated systems, which combine the indolo[3,2-b]carbazole unit with the formation of four-coordinate boron complexes, is presented. The resulting conjugated compounds have a double-laddered structure that provides interesting optical and electrochemical properties. The wide absorption range, covering most of the visible spectrum, along with the narrowing of the HOMO-LUMO energy gap, due to the presence of diphenylboryl centers, reinforces the potential of these molecules within the area of organic electronics.
BF<sub>3</sub>-grafted Fe<sub>3</sub>O<sub>4</sub>@Sucrose nanoparticles as a highly-efficient acid catalyst for syntheses of Dihydroquinazolinones (DHQZs) and Bis 3-Indolyl Methanes (BIMs)
core and grafting of boron trifluoride (BF3) onto the new surface. The catalytic activity of these nanoparticles was tested in syntheses of Dihydroquinazolinones (DHQZs) and Bis (3‐Indolyl) Methanes (BIMs) as two fruitful pharmaceutical structures. Acidic capacity, FT‐IR, XRD, VSM, TGA and SEM–EDX tests are carried out on such novel nanoparticles (NPs). Catalyst has shown more acidic capacity per one
当前的论文表示将蔗糖固定在Fe 3 O 4核上并将三氟化硼(BF 3)接枝到新表面上。在二氢喹唑啉酮(DHQZs)和双(3-吲哚基)甲烷(BIM)的合成中,作为两种卓有成效的药物结构,测试了这些纳米颗粒的催化活性。对这种新型纳米颗粒(NP)进行了酸性容量,FT-IR,XRD,VSM,TGA和SEM-EDX测试。与以前报道的磺化同系物相比,催化剂每1克NP的酸容量更高。
Utilization of flow chemistry in catalysis: New avenues for the selective synthesis of Bis(indolyl)methanes
作者:Swapna S. Mohapatra、Zoe E. Wilson、Sujit Roy、Steven V. Ley
DOI:10.1016/j.tet.2017.02.026
日期:2017.4
Flow chemistry enables the preparation of bis(indolyl)methanes from various indoles and structurally divergent aldehydes using Sc(OTf)3 catalysis. The reaction is regioselective for C-3 functionalization of the indoles, occurring over short reaction times allowing for rapid investigation of scope with straightforward work up facilitating product isolation.
An Efficient Preparation of Bis(indole)methanes Catalyzed by Tetrakis[3,5-bis(trifluoromethyl)phenyl]borate Salts in Aqueous Medium
作者:Shiuh-Tzung Liu、Bei-Sih Liao、Jwu-Ting Chen
DOI:10.1055/s-2007-990788
日期:2007.10
An efficient and direct preparation of bis(indole)methanes from indole and the corresponding carbonyl compound in water catalyzed by metal salts of tetrakis[3,5-bis(trifluoromethyl)phenyl]borate has been developed.
Bis-indolylation of aldehydes and ketones using silica-supported FeCl<sub>3</sub>: molecular docking studies of bisindoles by targeting SARS-CoV-2 main protease binding sites
We report herein an operationally simple, efficient and versatile procedure for the synthesis of bis-indolylmethanes via the reaction of indoles with aldehydes or ketones in the presence of silica-supported ferric chloride under grindstone conditions. The prepared supported catalyst was characterized by SEM and EDX spectroscopy. The present protocol has several advantages such as shorter reaction time
我们在此报道了一种操作简单、高效且通用的方法,用于在磨石条件下,在二氧化硅负载的氯化铁存在下,通过吲哚与醛或酮的反应来合成双吲哚基甲烷。通过SEM和EDX光谱对制备的负载型催化剂进行了表征。本方案具有反应时间短、产率高、反应过程中避免使用有害有机溶剂以及对多种官能团的耐受性等优点。使用合成的双吲哚进行了针对 SARS-CoV-2 主要蛋白酶(3CL pro或 M pro )酶结合位点的分子对接研究。我们的研究表明,一些合成的化合物有可能通过疏水性和氢键相互作用与活性位点的关键氨基酸残基相互作用,从而抑制 SARS-CoV-2 M前酶。
Well-Defined NNS-Mn Complex Catalyzed Selective Synthesis of C-3 Alkylated Indoles and Bisindolylmethanes Using Alcohols
Herein, we demonstrated Mn-catalyzed selective C-3 functionalization of indoles with alcohols. The developed catalyst can also furnish bis(indolyl)methanes from the same set of substrates under slightly modified reaction conditions. Mechanistic studies reveal that the C-3 functionalization of indoles is going via a borrowing hydrogen pathway. To highlight the practical utility, a diverse range of substrates