Results 61 to 70 of about 18,744 (300)

Chemoenzymatic Route toward a De Novo Enantioselective Total Synthesis of (S)‐Baclofen Based on Metal‐Catalyzed Hydroformylation and Enzymatic Transamination

ChemBioChem, EarlyView.
A unique chemoenzymatic synthesis route toward (S)‐baclofen is presented, which highlights a hydroformylation and biocatalysis step toward the synthesis of such a challenging β‐chiral amino acid. The shown methodology exhibits high conversions and enantiomeric excess and is transferable to other β‐chiral amines and amino acids.
Feodor Belov, Hannah Bork, Luise Hänel, Manideep V. Kollipara, Matthias Höhne, Harald Gröger, Jan von Langermann   +6 more
wiley   +1 more source

Bis(1-adamantyl)(2-morpholinophenyl)phosphine (Mor-DalPhos) [PDF]

, 2014
(ligand employed in transition metal-catalyzed reactions) Alternate Name: di(1-adamantyl)-2-morpholinophenylphosphine. Physical Data: mp 219–224 °C. Solubility: soluble in most polar organic solvents.
Alsabeh, Crawford, DeAngelis, Hesp, Hesp, Lundgren, Lundgren, Lundgren, Luo, Tardiff, Tardiff   +10 more
core   +1 more source

Indole Synthesis via Allenyl Ester; Enantioselective Total Synthesis of Geissoschizoline

ChemistryEurope, EarlyView.
An indole synthesis via an allenyl ester intermediate at ambient temperature has been developed. The mild reaction conditions allow the use of a broad range of substrates. Notably, the utility of this approach is demonstrated through the asymmetric total synthesis of geissoschizoline, a Strychnos‐type monoterpenoid indole alkaloid.
Sohsuke Moriue, Honami Nishioka, Yuto Fukuda, Hiromitsu Takayama, Mariko Kitajima, Hayato Ishikawa   +5 more
wiley   +1 more source

Reactivity of Acyclic (pentadienyl)iron(1+) Cations with Phosphonate Stabilized Nucleophiles: Application to the Synthesis of Oxygenated Metabolites of Carvone [PDF]

, 2016
The addition of phosphonate stabilized carbon nucleophiles to acyclic (pentadienyl)iron(1+) cations proceeds predominantly at an internal carbon to afford (pentenediyl)iron complexes.
Donaldson, William, Gone, Jayapal Reddy, Lee, Do W., Ma, Yuzhi, Manful, Charles Felix   +4 more
core   +2 more sources

Impact of Oxygen and Sulfur Heteroatom Core Substitution on Catalyst Properties of Phenoxazines and Their Performance in Organocatalyzed Atom Transfer Radical Polymerization (O‐ATRP)

Chemistry – A European Journal, EarlyView.
Phenoxazine core structural modification reveals the impact of charge transfer on stronger excited state reduction potentials. We observed that modifying the core of a photocatalyst that does not exhibit charge transfer yields a highly reducing singlet excited state reduction potential compared to a charge transfer equivalent. Abstract Phenoxazines are
Jessica L. Lathrop, Brandon S. Portela, Robert S. Paton, Garret M. Miyake   +3 more
wiley   +1 more source

Recent Advances in Detergent Chemistry and Handling Support Membrane Protein Analysis Including Lipid Interactions

Chemistry – A European Journal, EarlyView.
Detergent design parameters determine experimental successes in membrane protein research. Recent progresses in detergent chemistry are reviewed to promote the top‐down design of non‐ionic detergents for the purification and analysis of intact membrane proteins, including lipid interactions.
Katharina Alker, Jan‐Simon Behnke, Leonhard H. Urner   +2 more
wiley   +1 more source

Determination of flavonoids by LC/MS and anti-inflammatory activity in Moringa oleifera

Journal of Functional Foods, 2013
Moringa oleifera is an important multipurpose tropical tree under-recognized for its nutritional and medicinal properties. Leaves of moringa collected from sub-Sahara Africa were analyzed for phenolic components by HPLC–UV–MS.
Julia P. Coppin, Yanping Xu, Hong Chen, Min-Hsiung Pan, Chi-Tang Ho, Rodolfo Juliani, James E. Simon, Qingli Wu   +7 more
doaj  

Heterocycle-based bifunctional organocatalysts in asymmetric synthesis [PDF]

, 2016
Different chiral bifunctional organocatalysts derived from trans-cyclohexane-1,2-diamine bearing different types of guanidine units able to form-hydrogen bonding activation have been designed. Conformational rigid 2-aminobenzimidazoles bearing a tertiary
Gómez Bengoa, Enrique, Nájera, Carmen, Sansano, Jose M.   +2 more
core   +2 more sources

Fluorenyl Cations: Synthesis and Reactivity

Chemistry – A European Journal, EarlyView.
This review covers the history of fluorenyl cations from Deno's first report in 1954 on the parent fluorenyl cation to the present. The parent cation and most derivatives have only been observed as a fleeting species by mass spectrometry, UV/Vis spectroscopy, IR spectroscopy, or NMR spectroscopy while recent developments led to isolable species ...
Kanika Vashisth, Sameera Ranasinghe, Ayesha Begum, Manjur O. Akram, Jason L. Dutton, Caleb D. Martin   +5 more
wiley   +1 more source

Intermolecular Tandem Addition/Esterification Reaction of Alkenes with Malonates Leading to γ‐Lactones Mediated by Molecular Iodine under Visible Light Irradiation

, 2017
The iodine-mediated intermolecular C–C bond-forming/esterification reaction of various alkenes including α-olefins with malonates under irradiation using a compact fluorescent lamp has been developed to synthesize γ-lactones in moderate-to-excellent ...
Saki Maejima, E. Yamaguchi, A. Itoh
semanticscholar   +1 more source