Results 31 to 40 of about 41,140 (322)
(Thio)urea-mediated synthesis of functionalized six-membered rings with multiple chiral centers
Beilstein Journal of Organic Chemistry, 2016 Organocatalysis, now running its second decade of life, is being considered one of the main tools a synthetic chemist has to perform asymmetric catalysis. In this review the synthesis of six-membered rings, that contain multiple chiral centers, either by
Giorgos Koutoulogenis +2 more
doaj +1 more source
Palladium-catalyzed Suzuki-Miyaura coupling of thioureas or thioamides
Nature Communications, 2019 Cross-coupling reactions involving metal carbene intermediates play an increasingly important role in C–C bond formation. Expanding the carbene precursors to a broader range of starting materials and more diverse products is an ongoing challenge in ...
Shaoyu Mai +4 more
semanticscholar +1 more source
SynOpen, 2020 A convenient, large-scale, and cost-efficient synthesis of 4,5-diarylsubstituted N,N-diarylimidazolium salts is described. A variety of 1,3,4,5-tetraaryl imidazolium salts with increasing electron donation and steric bulk of the N-aryl groups was ...
Cengiz Azap +2 more
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Journal of Sulfur Chemistry, 2018 1-(acyl/aroyl)-3-(substituted)thioureas are exciting structures in the fields of organic synthesis, material sciences, and biomedical research. Of particular significance is the fact that acyl thiourea derivatives have been demonstrated to be highly ...
A. Saeed +5 more
semanticscholar +1 more source
Synthesis and Applications of Carbohydrate-Based Organocatalysts
Molecules, 2021 Organocatalysis is a very useful tool for the asymmetric synthesis of biologically or pharmacologically active compounds because it avoids the use of noxious metals, which are difficult to eliminate from the target products.
Elżbieta Wojaczyńska +4 more
doaj +1 more source
Angewandte Chemie, 2019 Thioureas have emerged as effective hydrogen-bonding catalysts over the last two decades, and they are broadly utilized in asymmetric catalysis. We report that achiral trisubstituted thioureas function as beneficial secondary ligands to CuI catalysts ...
Pandur Venkatesan Balaji +3 more
semanticscholar +1 more source
Beilstein Journal of Organic Chemistry, 2016 2-(Alkyl(aryl)amino)thiazol-4(5H)-ones can regioselectively be prepared from monoalkyl(aryl)thioureas and maleimides. In solution, the former heterocycles exist in a tautomeric equilibrium with 2-(alkyl(aryl)imino)thiazolidin-4-ones and the substituent ...
Alena S. Pankova +4 more
doaj +1 more source
Research on chemical intermediates (Print), 2017 1-(Acyl/aroyl)-3-(substituted)thioureas are privileged architectures that have received remarkable attention of researchers in view of their variable topological aspects, binding modes and broad spectrum promising pharmacological properties.
A. Saeed +4 more
semanticscholar +1 more source
Journal of the American Chemical Society, 2018 Carboxylic acids and their corresponding carboxylate anions are generally utilized as Brønsted acids/bases and oxygen nucleophiles in organic synthesis. However, a few asymmetric reactions have used carboxylic acids as electrophiles.
Noboru Hayama +6 more
semanticscholar +1 more source
Synthesis and catalytic activity of fluorous chiral primary amine-thioureas [PDF]
, 2013 Three enantiopure fluorous thioureas featuring a free -NH2 group were synthesized by direct addition of aromatic isothiocyanates bearing a single n-C8F17 substituent in the ortho, meta and para position, respectively, to enantiopure (1R,2R)-1,2 ...
S. Orlandi +3 more
core +1 more source