Showing papers in "Tetrahedron Letters in 2020"

TL;DR: In this paper, a review summarizes the recent progress of photochemical reaction initiated by Electron-donor-acceptor (EDA) complex in synthetic organic chemistry and encourages further growth in this field.

TL;DR: In the last two years, there has literally been an explosion of published research activities that have expanded the toolbox of reactions for designing DNA-encoded libraries, including modern photoredox chemistries as well as strategies to perform encoded compound synthesis in organic solvents or exploit nano-heterogeneous systems as discussed by the authors.

TL;DR: Molecular imprinting has been developed to prepare space mimicking the shape of molecule in material, and it has been applied to sensing, adsorption, catalysis, etc as mentioned in this paper.

TL;DR: A review of the main advances in this area can be found in this paper, with the aim of providing a comprehensive overview of the subject from the viewpoint of both academia and industry.

TL;DR: In this article, the synthesis of pyrazolines via one-pot and two-pot synthetic techniques is discussed, which is a unique method for direct reaction of α, β-unsaturated aldehydes and acetophenones with hydrazines.

TL;DR: A convenient and environmentally safer method has been developed for the rapid synthesis of 3-alkynyl substituted 2-chloroquinoxaline derivatives under Cu-catalysis assisted by ultrasound.

TL;DR: Iridium-catalyzed hydrosilylation of amides with 1,1,3,3-tetramethyldisiloxane (TMDS) allows access to silylhemiaminals, which are often spontaneously converted to aldenamines as mentioned in this paper.

TL;DR: The existing or potential applications of fused 1,2,5-thia-and -selenadiazoles in material science have been summarized in this article, which summarizes the recent progress in synthetic approaches, functionalization and employment of smart molecular materials based on these heterocycles.

TL;DR: In this article, a simple and efficient method was demonstrated for the synthesis of benzimidazoles via cyclocondensation of o-phenylenediamine with aldehydes in the presence of catalytic amount of tert-butyl nitrite.

TL;DR: In this article, a new magnetic nanoparticles-supported palladium(II) nanomagnetic catalyst (Pd-AcAc-Am-Fe3O4@SiO2) was synthesized and characterized using attenuated total reflectance infrared spectroscopy (ATR-IR), inductively coupled plasma-atomic emission spectroscope (ICP-AES), energy-dispersive X-ray spectroscopic (EDS), field-emission scanning electron microscopy (FE-SEM), TEM and vibrating sample magnetometer (VSM

TL;DR: A review of one-pot/multistep reactions for the synthesis of C3/C4-annulated indoles employing on organo-and transition metal catalysis can be found in this article.

TL;DR: Four new compounds, including three drimane sesquiterpenoids purpurides E–G and one isocoumarin peniisocou marin H, together with 15 known compounds, were isolated from the marine-sourced fungus Penicillium minioluteum ZZ1657, and showed antimicrobial activities against methicillin-resistant Staphylococcus aureus, Escherichia coli, and Candida albicans.

TL;DR: In this paper, recent advances of propiolic acids in decade (2009-2019) were summarized as five pathways according to their triggered mechanisms: acids as nucleophiles; electrophilic alkynes; decarboxylative coupling; decarsynastic addition.

TL;DR: The number of developed methodologies for the ring expansion of cyclobutanol rings to five, six and seven-membered rings has increased significantly over the last six years.

TL;DR: A cascade synthesis of 2,3-dihydroquinazolin-4(1H)-ones has been developed from 2-aminobenzonitriles and carbonyl analogues using Gemini basic ionic liquid as green catalyst cum solvent at room temperature as mentioned in this paper.

TL;DR: In this article, three new positional isomers (Z)-2-(pyridin-2-yl)-3-(4′-(1,2,2-triphenylvinyl)-[1,1′-biphenyl]-4-yl)acrylonitrile (o-PyTBA), (Z]-2-( pyrin-3-yl]-3-( 4′-( 1, 2, 2-trianglyl)-4-YL)-[ 1,1, 1.2, 2.5)-triphen

TL;DR: In this paper, an efficient one-pot multicomponent strategy for the synthesis of a mini library of 1,4-disubstituted 1,2,3-triazoles is described.

TL;DR: A survey of recent trends in the development and application of diazo and diazonium compounds for surface modification of diverse materials can be found in this article, where the interest in these reagents derives both from their ready capacity to extrude nitrogen and in so doing generate reactive species, such as carbenes or radicals.

TL;DR: In this paper, the synthesis of a polytriarylamine (PTAA) using the Suzuki polycondensation reaction was reported, which was evaluated as a hole transport material in perovskite solar cells with n-i-p configuration.

TL;DR: An atom, step, and energy economic approach based on the union of multicomponent reactions (MCRs) is reported to create higher-order MCRs with unique possibilities for complexity generation of fully-substituted furan derivatives containing pseudopeptidic groups.

TL;DR: In this paper, a series of diverse sulfinic esters were derived from readily available alcohols and thiophenols, and they were used to achieve moderate to good yields without the assistance of any metallic catalysts, bases, and additional oxidants.

TL;DR: The halogen-containing products can be stereoselectively transformed into sulfurated derivatives via nucleophilic substitution (SN2) reactions, indicating that they may serve as candidates in the development of covalent inhibitors with potential biological activity.

TL;DR: An efficient method for the synthesis of functionalized Chroman-4-ones via cascade radical cyclization of sodium sulfinates and o-(allyloxy)arylaldehydes using silver as catalyst and K2S2O8 as oxidant was presented in this article.

TL;DR: In this paper, a 3-component reaction of aldehydes, secondary amines and acetylenes to form propargylamines (A3-coupling) has been studied with twelve readily available copper-containing minerals.

TL;DR: In this paper, an abnormal cycloaddition with isatin N,N′cyclic azomethine imines and styrylisoxazoles for the formation of spirocyclic oxindoles via C(sp3)-H activation and C3 umpolung of quaternary oxindole has been developed.

TL;DR: In this article, the authors review the recent developments in phosphine oxide-catalyzed asymmetric reactions, including double aldol, carboxylic acid, and halocyclization.

TL;DR: Graphene quantum dots (GQDs) as discussed by the authors are carbon-based materials that correspond to nano-fragments of functional graphene-like structures and display photoluminescence features (fluorescence and/or phosphorescence) that could be finely tuned according to their surface and edges chemistry.

TL;DR: In this paper, the synthesis of α-dithiocarbamato-alkyl-β-naphthols is reported via the Betti reaction of naphthol, aldehydes, and ammonia-based dithiamates under solvent-free conditions.

TL;DR: In this paper, the direct selanylation of a diverse array of (hetero)arenes, including imidazo[2,1-b]thiazole, imidaze[1,2-a]pyridine, 1H-indole, 1 H-pyrazole, isoxazole and naphthalen-2-ol is presented.

TL;DR: Compound 10e containing 3,5-bis(trifluoromethyl)phenyl moiety at the terminal thiourea and phenylamino at theTerminal acyl position showed the best cytotoxic activities against seven cancer cell lines and docking studies suggested that 10e could serve as potential candidate for cancer therapy.