Results 41 to 50 of about 4,239 (221)

4-Azafluorenone and α-Carboline Fluorophores with Green and Violet/Blue Emission

Molecules, 2019
The emission properties of three 4-azafluorenone and five new α-carboline fluorophores in both solution and thin solid films were investigated. Fluorescence of the azafluorenone is clearly enhanced in thin solid films due to the presence of phenyl ...
Marek Cigáň, Peter Danko, Henrich Brath, Matúš Čakurda, Roman Fišera, Jana Donovalová, Juraj Filo, Martin Weis, Ján Jakabovič, Miroslav Novota, Anton Gáplovský   +10 more
doaj   +1 more source

Rumors of Psychedelics, Psychotropics and Related Derivatives in Vachellia and Senegalia in Contrast with Verified Records in Australian Acacia

Plants, 2022
There are almost 1000 species of Acacia sensu stricto in Australia, while the 44 species and 4 subspecies in southern Africa were taxonomically revised in the year 2011 to Senegalia and Vachellia.
Nicholas J. Sadgrove
doaj   +1 more source

Cu(I)-Catalyzed Chemoselective and Stereoselective [3 + 3] Cycloaddition of Azomethine Ylides with 2‑Indolylnitroethylenes: Facile Access to Highly Substituted Tetrahydro-γ-Carbolines

, 2016
A Cu­(I)-catalyzed asymmetric [3 + 3] cycloaddition of azomethine ylides with 2-indolylnitroethylenes is described. Challenges confronted in this reaction include chemoselectivity between [3 + 2] cycloaddition and [3 + 3] cycloaddition, reactivity and ...
Wen-Jing Qin (2269477), Wu-Lin Yang (1520389), Chun-Yan Li (418568), Xingxin Yu (1392106), Wei-Ping Deng (1392103), Fei-Fei Tang (1520386)   +5 more
core   +2 more sources

Bioassay-Guided Interpretation of Antimicrobial Compounds in Kumu, a TCM Preparation From Picrasma quassioides’ Stem via UHPLC-Orbitrap-Ion Trap Mass Spectrometry Combined With Fragmentation and Retention Time Calculation

Frontiers in Pharmacology, 2021
The stem of Picrasma quassioides (PQ) was recorded as a prominent traditional Chinese medicine, Kumu, which was effective for microbial infection, inflammation, fever, and dysentery, etc.
Haibo Hu, Haibo Hu, Changling Hu, Jinnian Peng, Alokesh Kumar Ghosh, Ajmal Khan, Dan Sun, Dan Sun, Walter Luyten   +8 more
doaj   +1 more source

Electrochemical Oxidative Rearrangement of Tetrahydro-β-carbolines in Zero-gap Flow Cell

, 2022
Oxidative rearrangement of tetrahydro-β-carbolines (THβCs) is one of the most widely used reactions for the synthesis of biologically active spirooxindoles (natural products and drug molecules).
Yiting, Zheng, Lei, Zhang, Rongbiao, Tong, Terry, Tong, Yuen Tsz, Chueng, Qing, Chen, Lixin, Liang, Huiying, Qiu, Anson, Tsang   +8 more
core   +1 more source

Carbenium catalysis toward β-carbolines [PDF]

, 2023
This preview highlights the findings of Liu, Jia, Loh, and co-workers, reported recently in Cell Reports Physical Science on the synthesis of β-carbolines in good to excellent yields, catalyzed by the [Ph3C]+[B(C6F5)4]− ion pair.
Richards, Emma, Melen, Rebecca L.
core   +1 more source

Synthesis of α- and β-carbolines by a etalation/Negishi cross-coupling/SNAr reaction sequence [PDF]

, 2022
A methodology for the synthesis of α- and β-carbolines from fluoropyridines and 2-haloanilines is reported. This procedure consists of a four-step directed ortho-lithiation, zincation, Negishi cross-coupling, and intramolecular nucleophilic aromatic ...
Sathiyalingam, Shainthavaan, Roesner, Stefan   +1 more
core   +3 more sources

Comparative Effects of α-, β-, and γ-Carbolines on Platelet Aggregation and Lipid Membranes

Journal of Toxicology, 2011
Cigarette smoking and alcohol consumption possibly affect platelet functions. To verify the hypothesis that some α-, β-, and γ-carboline components in cigarette smoke and alcoholic beverages may change platelet aggregability, their effects on human ...
Hironori Tsuchiya
doaj   +1 more source

Diversity-oriented synthesis derived indole based spiro and fused small molecules kills artemisinin-resistant Plasmodium falciparum

Malaria Journal, 2021
Background Despite numerous efforts to eradicate the disease, malaria continues to remain one of the most dangerous infectious diseases plaguing the world. In the absence of any effective vaccines and with emerging drug resistance in the parasite against
Akshaykumar Nayak, Himani Saxena, Chandramohan Bathula, Tarkeshwar Kumar, Souvik Bhattacharjee, Subhabrata Sen, Ashish Gupta   +6 more
doaj   +1 more source

Consecutive Four-Component Coupling-Addition Aza-Anellation Pictet–Spengler Synthesis of Tetrahydro-β-Carbolines: An Optimized Michael Addition and Computational Study on the Aza-Anellation Step

Organics, 2023
Starting from acid chlorides, alkynes, tryptamines, and acryloyl chloride, 21 densely substituted tetrahydro-β-carbolines were prepared in a four-component, one-pot reaction.
Kai Ries, Françoise A. Aouane, Thomas J. J. Müller   +2 more
doaj   +1 more source