Results 41 to 50 of about 41,140 (322)
Synthesis of chiral sulfoximine-based thioureas and their application in asymmetric organocatalysis
Beilstein Journal of Organic Chemistry, 2012 For the first time, chiral sulfoximine derivatives have been applied as asymmetric organocatalysts. In combination with a thiourea-type backbone the sulfonimidoyl moiety leads to organocatalysts showing good reactivity in the catalytic desymmetrization ...
Marcus Frings +2 more
doaj +1 more source
Journal of the American Chemical Society, 2017 An investigation of the mechanism of benzoic acid/thiourea co-catalysis in the asymmetric Pictet–Spengler reaction is reported. Kinetic, computational, and structure–activity relationship studies provide evidence that rearomatization via deprotonation of
R. Klausen +3 more
semanticscholar +1 more source
Photocyclization of N-(3-chloro-2-benzo[b]thienocarbonyl)-N'-monosubstituted thioureas [PDF]
, 1986 N-(3-Chloro-2-benzo[b]thienocarbonyl)-N'-monosubstituted thioureas, when irradiated with a high-pressure mercury discharge lamp through a pyrex or quartz filter, give the corresponding benzothienothiazine derivatives in lower yields than the analogous N',
Pavol Kristian +5 more
core +1 more source
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2017 1-Acyl thioureas [R1C(O)NHC(S)NR2R3] are shown to display conformational flexibility depending on the degree of substitution at the nitrogen atom. The conformational landscape and structural features for two closely related thioureas having R1=2-furoyl ...
R. R. Cairo +9 more
semanticscholar +1 more source
Pyridyl thioureas as switchable anion receptors [PDF]
, 2006 The binding selectivity of simple pyridyl thioureas in acetonitrile can be completely switched by protonation; hence the neutral thiourea binds acetate, but not chloride or bromide, whereas the protonated thiourea binds strongly to chloride or bromide ...
Kilburn, Jeremy D. +2 more
core +1 more source
Journal of Organic Chemistry, 2018 Novel styryl-substituted thioureas and squaramides were obtained in three steps from commercially available 4-hydroxy-3,5-dichloroaniline. These organocatalysts promote cascade reactions in high yields and excellent stereoselection. By using only a 5 mol
J. Andrés +3 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.This work presents a ligand‐pairing strategy that reconstructs lead sulfide quantum dot surfaces for efficient short‐wave infrared optoelectronics. A low‐reactivity thiourea precursor combined with hydrobromic acid enables monodisperse and fully passivated quantum dots.
Dongeon Kim +16 more
wiley +1 more source
The Synthesis of Some Pyrimidinyl and Thiazolyl Ureas and Thioureas and Some Related Compounds [PDF]
, 1988 Some pyrimidin-2- and pyrimidin-4-amines were treated with isocyanates and isothiocyanates to give the corresponding disubstituted ureas or thioureas . A pyrimidin-2-amine is more reactive than a pyrimidin-4- amine in these reactions.
DT Hurst +4 more
core +1 more source
Insertion of Arynes into Thioureas: A New Amidine Synthesis [PDF]
, 2016 Arynes, generated from trimethylsilyl phenyltriflate precursors, have been found to react with thioureas via a formal π-insertion into the CS bond. The reaction contrasts with that of ureas, which proceeds via benzyne σ-insertion into the C–N bond, and ...
Michael F. Greaney (1299891) +1 more
core +5 more sources
Advanced Materials, EarlyView.Extracellular vesicles (EVs) are cell‐derived nanoparticles that mediate intercellular communication through their dynamic biointerfaces. Owing to their intrinsic biological functions, EVs have emerged as promising platforms for biomedical applications.
Leila Pourtalebi Jahromi +3 more
wiley +1 more source