Results 91 to 100 of about 118,878 (273)

Retrosynthetic reaction prediction using neural sequence-to-sequence models

, 2017
We describe a fully data driven model that learns to perform a retrosynthetic reaction prediction task, which is treated as a sequence-to-sequence mapping problem.
Gomes, Joseph, Ho, Stephen, Kawthekar, Prasad, Liu, Bowen, Nguyen, Quang Luu, Pande, Vijay, Ramsundar, Bharath, Shi, Jade, Sloane, Jack, Wender, Paul   +9 more
core   +2 more sources

A Low‐Symmetry FeII Tetrahedron From a Flexible Tritopic Ligand

Chemistry – A European Journal, EarlyView.
A highly symmetric and flexible tris‐bidentate tritopic ligand forms an S4 meso homoleptic face‐capped FeII tetrahedron near‐quantitatively in acetonitrile. The addition of nitromethane solvent causes partial isomerization of this meso cage to the racemic homochiral tetrahedron, with the complexity of the system being moderated through solvophobic ...
Rosemary J. Goodwin, Nina R. Lawson, Michael G. Gardiner, Jack D. Evans, Paul E. Kruger, Dan Preston   +5 more
wiley   +1 more source

Xylose Acetals ‐ a New Class of Sustainable Solvents and Their Application in Enzymatic Polycondensation

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Novel organic solvents with an unmodified carbohydrate core were synthesised both from D‐xylose and directly from biomass and were successfully used as reaction media for lipase biocatalysts to synthesise aliphatic and aromatic polyesters. Abstract The use of organic solvents in academic research and industry applications is facing increasing ...
Anastasia O. Komarova, Cicely M. Warne, Hugo Pétremand, Laura König‐Mattern, Johannes Stöckelmaier, Chris Oostenbrink, Georg M. Guebitz, Jeremy Luterbacher, Alessandro Pellis   +8 more
wiley   +1 more source

Stereochemical Research on Cembranes Diterpenoid Sinulariol Z Based on Residual Dipolar Couplings

Chinese Journal of Magnetic Resonance
Research on the stereochemistry of natural products, especially that of flexible macrocyclic molecules, has always been a huge challenge. Cembranes diterpenoids are a typical class of flexible macrocyclic molecules, whose configurations are often ...
SHI Xing, ZHANG Yue, ZHANG Xiuli, WANG Cong   +3 more
doaj   +1 more source

Plasma analysis of di- and trihydroxycholestanoic acid diastereoisomers in peroxisomal α-methylacyl-CoA racemase deficiency

Journal of Lipid Research, 2001
We identified a new peroxisomal disorder caused by a deficiency of the enzyme α-methylacyl-coenzyme A (CoA) racemase. Patients with this disorder show elevated plasma levels of pristanic acid and the bile acid intermediates di- and trihydroxycholestanoic
Sacha Ferdinandusse, Henk Overmars, Simone Denis, Hans R. Waterham, Ronald J.A. Wanders, Peter Vreken   +5 more
doaj   +1 more source

Iron-mediated Preparation of Vinylcyclopropanes. Scope, Mechanism, and Applications [PDF]

, 2003
The addition of stabilized carbon nucleophiles to tricarbonyl(1-methoxycarbonylpentadienyl)iron(1+) cation (1a) proceeds via attack at C2 on the face of the ligand opposite the Fe(CO)3 group to generate tricarbonyl(pentenediyl)iron complexes 2. Oxidation
Cao, Yeyu, Donaldson, William A., Godula, Kamil, Yun, Young K.   +3 more
core   +1 more source

Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo, Vincenzo Patamia, Chiara Zagni, Antonio Rescifina, Giuseppe Floresta   +4 more
wiley   +1 more source

Stereochemical course of hydrolytic reaction catalyzed by alpha-galactosidase from cold adaptable marine bacterium of genus Pseudoalteromonas

Frontiers in Chemistry, 2014
The recombinant α-galactosidase of the marine bacterium (α-PsGal) was synthesized with the use of the plasmid 40Gal, consisting of plasmid pET-40b (+) (Novagen) and the gene corresponding to the open reading frame of the mature α-galactosidase of marine ...
Irina Yu Bakunina, Larissa A Balabanova, Vasiliy A Golotin, Lyubov V Slepchenko, Lyubov V Slepchenko, Vladimir V Isakov, Valeriy A Rasskazov   +6 more
doaj   +1 more source

Design and Synthesis of Lactose‐Derived Ligands and Their Application in Asymmetric Friedel–Crafts Alkylation

European Journal of Organic Chemistry, EarlyView.
This work describes the synthesis of lactose‐ and glucose‐derived chiral ligands and their application in the catalytic enantioselective Friedel–Crafts alkylation of indole with a series of trans‐β‐nitrostyrenes. The optimal ligand was an acetate protected, lactose‐derived pyridyl imine and its zinc complex afforded ees up to 93% and yields up to 93 ...
Sandra Bulawa, Julia Bruno‐Colmenarez, Patrick J. Guiry   +2 more
wiley   +1 more source

Survey of Pharmacological Activity and Pharmacokinetics of Selected β-Adrenergic Blockers in Regard to Their Stereochemistry

Applied Sciences, 2019
The present survey concentrates on pharmacodynamics and pharmacokinetics of selected β-adrenergic blockers from the point of view of their stereochemistry. It could be shown that the activity in the arylaminoethanol and aryloxyaminopropanol group of
Ružena Čižmáriková, Ladislav Habala, Jindra Valentová, Mário Markuliak   +3 more
doaj   +1 more source