10102-94-0Relevant academic research and scientific papers
The ammonium-promoted formylation of indoles by DMSO and H2O
Fei, Haiyang,Yu, Jintao,Jiang, Yan,Guo, Huan,Cheng, Jiang
, p. 7092 - 7095 (2013)
DMSO and H2O is an efficient combination in the NH 4OAc-promoted formylation of indole, where DMSO serves as a C1 carbon source. The mechanism study reveals that the procedure involves a usual and unusual Pummerer reaction.
Screening metal-free photocatalysts from isomorphic covalent organic frameworks for the C-3 functionalization of indoles
Chen, Xiong,Feng, Xiao,Han, Songjie,Li, Chunzhi,Li, He,Li, Ziping,Liu, Xiaoming,Shao, Pengpeng,Xia, Hong
, p. 8706 - 8715 (2020)
The visible-light-driven organic transformation using two-dimensional covalent organic frameworks (2D-COFs) as metal-free heterogeneous photocatalysts is a green and sustainable approach, and it has gained a surge of interest by virtue of the photosensitizer's high crystallinity, abundant porosity, outstanding stability, excellent light-harvesting ability and tunable structure. However, the guiding principle for designing, constructing and selecting COF-based photocatalysts has not been put forward so far. Herein, we contribute a fascinating strategy to guide the acquisition of excellent framework photocatalysts, which is to screen them from a series of isomorphic COFs. As a proof of concept, three new isomorphic pyrene-based 2D-COFs (COF-JLU23, COF-JLU24 and COF-JLU25) with variable linkers were successfully synthesized. In addition to having similar crystallinity and porosity with the same pore size and shape, their absorption, emission, bandgap, energy level, transient photocurrent response and photocatalytic activity could be easily adjustedviaconfiguring different linkers in frameworks. Indeed, COF-JLU24 with electron donor-acceptor characteristics exhibited the best photocatalytic activity among the three isomorphic COFs for C-3 functionalization reactions of indoles, even better than that of the metal-free photocatalyst g-C3N4. More importantly, the screened COF-JLU24 as a metal-free photocatalyst still displayed extensive substrate adaptability and excellent recyclability. We anticipate that this strategy will become a robust rule of thumb for fast access to COF-based photocatalysts. In addition, we still highlight that the present study broadens the applied frontier of COF-based photocatalysts.
Eco-friendly synthesis and antimicrobial activities of substituted-5-(1H- indol-3-yl)methylene)-2,2-dimethyl-1,3-dioxane-4,6-dione derivatives
Thirupathi,Venkatanarayana,Dubey,Bharathi Kumari
, p. 1569 - 1580 (2014)
l-Tyrosine is an efficient catalyst for the condensation of substituted indole-3-aldehydes 1(a-d), N-methyl indole-3-aldehydes 4(a-d), and N-ethyl indole-3-aldehydes 6(a-d) with meldrum's acid (2) containing a cyclic active methylene group to produce 3(a-d), 5(a-d), and 7(a-d), respectively, in water at room temperature for 30 min. The antimicrobial activities of 3(a-d), 5(a-d), and 7(a-d) have been studied.
I2-mediated C3-formylation of indoles by tertiary amine and H2O
Zhang, Bo,Liu, Bin,Chen, Jianbin,Wang, Jiehui,Liu, Miaochang
, p. 5618 - 5621 (2014)
An I2-promoted 3-formylation of free (N-H) and N-substituted indoles with tetramethylethylenediamine (TMEDA) and H2O as the carbonyl source is achieved, providing 3-formylindole in moderate to excellent yields with good functional gr
Synthesis, biological evaluation and molecular docking studies of novel 1-(4,5-dihydro-1Hpyrazol-1-yl)ethanone-containing 1-methylindol derivatives as potential tubulin assembling inhibitors
Yang, Meng-Ru,Qin, Ya-Juan,Chen, Chen,Zhang, Ya-Liang,Li, Bo-Yan,Liu, Tian-Bao,Gong, Hai-Bin,Wang, Bao-Zhong,Zhu, Hai-Liang
, p. 30412 - 30424 (2016)
A series of novel compounds (6a-6v) containing 1-methylindol and 1-(4,5-dihydro-1H-pyrazol-1-yl) ethanone skeletons were designed, synthesized and biologically evaluated as potential tubulin polymerization inhibitors and anticancer agents. Among them, compound 6q showed the most potent tubulin polymerization inhibitory activity (IC50 = 1.98 mM) and in vitro growth inhibitory activity against A549, MCF-7 and HepG2 cell lines, with IC50 values of 0.15 mM, 0.17 mM, and 0.25 mM respectively, comparable to the positive control. Furthermore, compound 6q was a potent inducer of apoptosis in A549 cells and it had typical cellular effects for microtubule interacting agents, causing arrest of the cell cycle in the G2/M phase. Confocal microscopy assay and molecular docking results further demonstrated that 6q could bind tightly to the colchicine site of tubulin and act as an anti-tubulin agent. These studies, along with 3D-QSAR modeling provided an important basis for further optimization of compound 6q as a potential anticancer agent.
Aerobic transition-metal-free visible-light photoredox indole C-3 formylation reaction
Li, Xiang,Gu, Xiangyong,Li, Yongjuan,Li, Pixu
, p. 1897 - 1900 (2014)
An aerobic visible-light-promoted indole C-3 formylation reaction catalyzed by Rose Bengal has been developed. This transition-metal-free process employs molecular oxygen as the terminal oxidant and uses TMEDA as the one-carbon source through C-N bond cleavage. The reaction is compatible with a variety of functional groups.
The copper-catalyzed C-3-formylation of indole C-H bonds using tertiary amines and molecular oxygen
Chen, Jianbin,Liu, Bin,Liu, Dongfang,Liu, Shan,Cheng, Jiang
, p. 2438 - 2442 (2012)
A copper-catalyzed formylation reaction has been developed by employing oxygen (O2) as the clean oxidant. The C-H bonds of indoles were C-3-formylated by tetramethylethylenediamine (TMEDA) and water (H2O; in situ formed and external added water) as the carbonyl source in moderate to good yields with good functional group tolerance. Thus, it represents a facile procedure leading to 3-formylindoles. Copyright
1,2,3-Thiadiazole substituted pyrazolones as potent KDR/VEGFR-2 kinase inhibitors
Tripathy, Rabindranath,Ghose, Arup,Singh, Jasbir,Bacon, Edward R.,Angeles, Thelma S.,Yang, Shi X.,Albom, Mark S.,Aimone, Lisa D.,Herman, Joseph L.,Mallamo, John P.
, p. 1793 - 1798 (2007)
KDR kinase inhibition is considered to play an important role in regulating angiogenesis, which is vital for the survival and proliferation of tumor cells. Recently we disclosed a structure-based kinase inhibitor design strategy which led to the identification of a new class of VEGFR-2/KDR kinase inhibitors bearing heterocyclic substituted pyrazolones as the core template. Instability in a rat S9 preparation and poor iv PK profiles for most of these inhibitors necessitated exploration of new pyrazolones to identify new analogs with improved metabolic stability. Optimization of the heterocyclic moiety led to the identification of the thiadiazole series of pyrazolones (D) as potent VEGFR-2/KDR kinase inhibitors. SAR modifications, kinase selectivity profiling, and structural elements for improved PK properties were explored. Oral bioavailability up to 29% was achieved in the rat. Modeling results based on the Glide XP docking approach supported our postulation regarding the interaction of the lactam segment of the pyrazolones with the hinge region of the KDR kinase.
Total synthesis and antiproliferative activity screening of (±)-aplicyanins A, B and E and related analogues
?í?a, Miroslav,Pla, Daniel,Altuna, Marta,Francesch, Andrés,Cuevas, Carmen,Albericio, Fernando,álvarez, Mercedes
, p. 6217 - 6223 (2009)
The first total synthesis of the indole alkaloids (±)-aplicyanins A, B, and E, plus 17 analogues, all in racemic form, is reported. Modifications to the parent compound included changing the number of bromine substituents on the indole, the nature of the substituents on the indole nitrogen (H, Me, or OMe), and/or the oxidation level of the heterocyclic core tetrahydropyrimidine. Each compound was screened against three human tumor cell lines, and 14 of the newly synthesized compounds showed considerable cytotoxicity. The assay results were used to establish structure-activity relationships. These results suggest that the presence of the bromine at position 5 of the indole is critical to activity, as well as the acetyl group on the imine nitrogen does in some compounds. 2009 American Chemical Society.
Visible-Light-Mediated α-Oxygenation of 3-(N,N-Dimethylaminomethyl)-Indoles to Aldehydes
Stanek, Filip,Paw?owski, Robert,Mlynarski, Jacek,Stodulski, Maciej
, p. 6624 - 6628 (2018)
The visible-light-mediated oxygenation of 3-N,N-(dimethylaminomethyl)-indoles bearing various substituents afforded a series of 3-carbaindole derivatives. Herein we describe the reaction scope, a plausible mechanism and a practical application of this transformation in the formal synthesis of (–)-vincorine is described as well.
