Results 131 to 140 of about 31,425 (239)
N-Triflylphosphorimidoyl Trichloride: A Versatile Reagent for the Synthesis of Strong Chiral Brønsted Acids [PDF]
, 2017 A series of strong Brønsted acids has been synthesized in high yields using N-triflylphosphorimidoyl trichloride as reagent.
Kaib, P., Lee, S., List, B.
core +2 more sources
Asian Journal of Organic Chemistry, Volume 14, Issue 6, June 2025.Two C3‐symmetric cage‐shaped phosphates were successfully synthesized and their activity as chiral Lewis‐basic catalysts for enantioselective iodocyclizations was evaluated. The different tethered groups of these phosphates influences their catalytic performance, leading to substrate‐dependent variations in reactivity and selectivity, showcasing the ...
Xiao Liu, Akihito Konishi, Makoto Yasuda
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2009 An enantioselective route to four tricyclic amino acids and N-tosylamides, composed of a central norbornane framework with a 2-endo,3-endo-annelated pyrrolidine ring and a 5-endo-C1 or -C2 side chain, has been developed. A key intermediate was the chiral,
Matthias Breuning +6 more
doaj +1 more source
Enantioselective conjugate addition of ketones to β-nitrostyrenes catalyzed by 1,2-amino alcohol-derived prolinamides [PDF]
, 2006 Various l-prolinamides 14, prepared from l-proline and chiral β-amino alcohols, are active bifunctional catalysts for the direct nitro-Michael addition of ketones to β-nitrostyrenes.
Almasi, Diana +2 more
core +1 more source
Catalysis in Chemical Modification of Proteins
ChemCatChem, Volume 17, Issue 11, June 6, 2025.Catalytic principles of synthetic organic chemistry have been increasingly applied to chemical modification of proteins during the recent years. This review article describes how seven types of catalytic systems —electrocatalysis, photocatalysis, metal catalysis, acid catalysis, organocatalysis, supramolecular catalysis, and heterogeneous catalysis ...
Seiya Ishizawa +4 more
wiley +1 more source
Three-Component Approach to Densely Functionalized Trifluoromethyl Allenols by Asymmetric Organocatalysis. [PDF]
J Am Chem Soc, 2023 Deliaval M +3 more
europepmc +1 more source
(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
SynOpen, 2019 A convenient and efficient method for the synthesis of (–)-bestatin, epibestatin, phebestin, and (3S,4R)-4-amino-3-hydroxy-5-phenylpentanoic acid is reported. The key step is a proline-catalyzed α-hydroxylation of an aldehyde derived from d-phenylalanine,
Vipin Kumar Jain
doaj +1 more source
Chiral Bronsted Acid-Catalyzed Enantioselective alpha-Amidoalkylation Reactions: A Joint Experimental and Predictive Study, [PDF]
, 2016 Enamides with a free NH group have been evaluated as nucleophiles in chiral Bronsted acid-catalyzed enantioselective alpha-amidoalkylation reactions of bicyclic hydroxylactams for the generation of quaternary stereocenters.
Aranzamendi Uruburu, Eider +4 more
core +2 more sources
Organocatalyzed Diels‐Alder Reactions: Unexplored Hydrogen Bond Donor Catalysts
ChemPlusChem, Volume 90, Issue 6, June 2025.Quantum chemical activation strain analyses show that urea‐derived hydrogen‐bond organocatalysts, including unconventional alternatives to the C=O group (e. g., C=C and C=Si), lower the Diels‐Alder reaction barrier between butadiene and acrolein by Pauli lowering catalysis.
Eveline H. Tiekink +3 more
wiley +1 more source