Results 61 to 70 of about 6,473 (220)

diastereoselectivity

Citation: 'diastereoselectivity' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08162 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for
openaire   +1 more source

Towards the total synthesis of keramaphidin B

Beilstein Journal of Organic Chemistry, 2016
The enantio- and diastereoselective Michael addition of a δ-valerolactone-derived pronucleophile to a substituted furanyl nitroolefin catalysed by a bifunctional cinchonine-derived thiourea has been used as the key stereocontrolling step in a new ...
Pavol Jakubec, Alistair J. M. Farley, Darren J. Dixon   +2 more
doaj   +1 more source

Computational ligand design in enantio- and diastereoselective ynamide [5+2] cycloisomerization

Nature Communications, 2016
Using a chiral catalyst to override the innate stereochemical outcome of a diastereoselective process is a challenging task. Here, the authors use theory and experiment to develop a cycloisomerization where the enantioselectivity is driven by the ...
R. N. Straker, Q. Peng, A. Mekareeya, R. S. Paton, E. A. Anderson   +4 more
doaj   +1 more source

Solvent‐Driven Conformational Landscapes of a Tetradentate Schiff Base Ligand and Its Metal Complexes: A Genetic Algorithm–Guided VCD Investigation

Chemistry – A European Journal, EarlyView.
Solvent effects: vibrational circular dichroism (VCD) revealed pronounced solvent‐induced conformational shifts for a tetradentate salen ligand in CDCl3, a solvent generally considered benign. Contrary to the DFT prediction of a single dominant conformer family, quantum cluster growth together with the genetic algorithm guided VCD analysis uncovered ...
Amanda Nhi Tran, Mutasem Alshalalfeh, Colton D. Carlson, Andra Aniţa Radu, Vlad Ţeposu, Joseph Cheramy, Lili Zeng, Hui Zhang, Valentin Paul Nicu, Yunjie Xu   +9 more
wiley   +1 more source

Formal Synthesis of (±)-Coriolin by Diastereocontrolled Nickel(0)-Catalyzed 'Metallo-ene-type' Cyclization/Methoxycarbonylation

CHIMIA, 1992
Bicyclooctanone (±)-2, an advanced intermediate for the synthesis of (±)-coriolin, has been synthesized in ten steps starting from 2,2-dimethylpent-4-enal (7). The key step 6 ?
Wolfgang Oppolzer, Akira Ando
doaj   +2 more sources

Hoch effiziente, präparative chromatographische Enantiomerentrennung von 2-Phenyl-1,3-dioxin-4-onen an Cellulose-triacetat und Cuprat-Additionen zu ?-Hydroxycarbonsäure-Derivaten

CHIMIA, 1991
The 2-Phenyl-dioxinones 1 and 2 are resolved on cellulose-triacetate columns (medium pressure, eluent MeOH, separation factors ? = 2.0–2.3, injection of g amounts).
Dieter Seebach, Urs Gysel, Joachim N. Kinkel   +2 more
doaj   +2 more sources

Catalytic Generation of Cationic Gold Carbene Complexes From 7‐Alkynylnorbornadienes and Their Intermolecular Cyclopropanation With Alkenes

Chemistry – A European Journal, EarlyView.
Efficient cationic gold(I)‐catalyzed intermolecular cyclopropanation of 7‐alkynylnorbornadiene derivatives has been developed. This methodology offers the synthesis of a new class of norbornene derivatives in high yield with excellent diastereoselectivity.
Kento Ishida, Kenta Toei, Fumiaki Tomi, Norio Sakai   +3 more
wiley   +1 more source

Highly Efficient and Diastereoselective Synthesis of New Pyrazolylpyrrolizine and Pyrazolylpyrrolidine Derivates by a Three-Component Domino Process

Molecules, 2014
Diastereoselective reactions between 4-formylpyrazoles, N-substituted maleimides and glycine derivates led to new series of pyrazolyldipyrrolo [3,4-a:3',4'-f]pyrrolizines and pyrazolylpyrrolo[3,4-c]pyrroles in good yields.
Jairo Quiroga, Jaime Gálvez, Rodrigo Abonia, Braulio Insuasty, Alejandro Ortíz, Justo Cobo, Manuel Nogueras   +6 more
doaj   +1 more source

N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, EarlyView.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

The synthesis of the 2,3-difluorobutan-1,4-diol diastereomers

Beilstein Journal of Organic Chemistry, 2017
The diastereoselective synthesis of fluorinated building blocks that contain chiral fluorine substituents is of interest. Here we describe optimisation efforts in the synthesis of anti-2,3-difluorobutane-1,4-diol, as well as the synthesis of the ...
Robert Szpera, Nadia Kovalenko, Kalaiselvi Natarajan, Nina Paillard, Bruno Linclau   +4 more
doaj   +1 more source