Ruthenium Olefin Metathesis Catalysts Bearing Carbohydrate-Based N-Heterocyclic Carbenes [PDF]
, 2010 Ru-based olefin metathesis catalysts containing carbohydrate-derived NHCs from glucose and galactose were synthesized and characterized by NMR spectroscopy. 2D-NMR spectroscopy revealed the presence of Ru−C (benzylidene) rotamers at room temperature, and
Grubbs, Robert H., Keitz, Benjamin K.
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Enantioselective Synthesis of the C(1)-C(6?) Subunit of Zaragozic Acid C
Journal of the Brazilian Chemical Society, 1998 Preparation of the C(1)-C(6?) subunit of Zaragozic acid C is described. The C(5?) methyl-bearing stereocenter is installed by rapid, regioselective opening of a phenylcyclopropyl carbinol with Pearlman?s catalyst (1 atm H2) in 2% triflic acid/methanol.
Carreira Erick M., Ledford Brian E.
doaj
Accessing chiral sulfones bearing quaternary carbon stereocenters via photoinduced radical sulfur dioxide insertion and Truce–Smiles rearrangement [PDF]
, 2022 Jiapian Huang +5 more
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Organocatalytic Enantioselective Synthesis of Pyrazoles Bearing a Quaternary Stereocenter [PDF]
Chemistry – An Asian Journal, 2016 AbstractAn efficient one‐pot asymmetric synthesis of pyrazoles bearing a chiral quaternary stereocenter has been developed. Quinine‐derived thiourea catalyzed the enantioselective addition of pyrazolones to isatin‐derived ketimines, providing the corresponding acetylated pyrazoles after in situ treatment with Ac2O/Et3N. The corresponding pyrazoles were
Carlos Vila +4 more
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Recent advances in the use of chiral aldimines in asymmetric synthesis [PDF]
, 2016 Chiral N-(tert-butyl)sulfinyl aldimines easily prepared from commercially available compounds have been used as starting materials for the following processes: (i) hydrogen transfer, (ii) addition of zincates, (iii) In-promoted allylation, and (iv ...
Foubelo, Francisco, Yus, Miguel
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Catalytic Asymmetric Synthesis of Tröger’s Base Analogues with Nitrogen Stereocenter [PDF]
, 2023 Chun Ma +4 more
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Enantioselective Tsuji Allylations [PDF]
, 2007 The family of allylation reactions developed by Tsuji in the 1980s are capable of generating tertiary and quaternary carbon stereocenters from several synthetic precursors.
Mohr, Justin T., Stoltz, Brian M.
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MolbankA practical four-step sequence for the synthesis of α,δ-dioxoesters with high enantiomeric excess was developed. It makes use of a regio- and stereoselective Michael addition of a chiral ketimine to ethyl 2-(phenylthio)-2-propenoate as a key ...
Domenico C. M. Albanese +1 more
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Correcting ligands, metabolites, and pathways [PDF]
, 2006 Contains fulltext : 35961.pdf ( ) (Open Access)BACKGROUND: A wide range of research areas in bioinformatics, molecular biology and medicinal chemistry require precise chemical structure information about molecules and reactions, e.g ...
Ott, M.A., Vriend, G.
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Recent progress in the synthesis of six-membered aminocyclitols (2008-2017) [PDF]
, 2018 Aminocyclitols are of interest as glucosidase inhibitors, as probes for the study of pseudoglycosyltransferases, and as potential therapeutics for the treatment of Gaucher’s disease.
Donaldson, William
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