Results 11 to 20 of about 63,316 (301)

The Stereochemistry of Ketoreduction [PDF]

open access: yesChemistry & Biology, 2005
In this issue of Chemistry & Biology, Leadlay and coworkers report overproduction of a number of ketoreductase domains from modular polyketide synthases. These discrete enzymes allow the stereochemistry of polyketide ketoreduction to be studied in isolation.
Caffrey, Patrick
openaire   +3 more sources

Stereochemistry of the Brivaracetam Diastereoisomers [PDF]

open access: yesChirality, 2016
AbstractThe stereochemistry of all four stereoisomers of brivaracetam was determined using vibrational circular dichroism (VCD) spectroscopy. By comparing experimentally obtained VCD spectra and computationally simulated ones, the absolute configurations can be confidently assigned without prior knowledge of their relative stereochemistry.
Qiu, Shi   +5 more
openaire   +5 more sources

Stereochemistry-Tunable Isocyanide-Based Polymerization

open access: yes, 2021
Regulation of stereochemistry is one of the most important research focuses in synthetic polymer chemistry; however, this area should be further developed.
Tianyu Cheng   +11 more
core   +1 more source

Stereochemistry-Controlled Mechanical Properties and Degradation in 3D-Printable Photosets

open access: yes, 2021
Stereochemistry provides an appealing handle by which to control the properties of small molecules and polymers. While it is established that stereochemistry in linear polymers affects their bulk mechanical properties, the application of this concept to ...
Anissa L. Khalfa (11570389)   +5 more
core   +1 more source

Stereochemistry and Total Synthesis of Neonorhalichondrin B

open access: yes, 2023
The first total synthesis of neonorhalichondrin B has been completed and the previously undetermined left half sidechain stereochemistry has been elucidated.
Rachelle, Quach   +2 more
core   +1 more source

Confirmation of the stereochemistry of spiroviolene

open access: yesBeilstein Journal of Organic Chemistry, 2023
We confirm the previously revised stereochemistry of spiroviolene by X-ray crystallographically characterizing a hydrazone derivative of 9-oxospiroviolane, which is synthesized by hydroboration/oxidation of spiroviolene followed by oxidation of the resultant hydroxy group.
Yao Kong   +9 more
openaire   +3 more sources

Mannich base-connected syntheses mediated by ortho-quinone methides

open access: yesBeilstein Journal of Organic Chemistry, 2018
This article provides an overview about specifically modified Mannich reactions where the process involves an ortho-quinone methide (o-QM) intermediate.
Petra Barta   +2 more
doaj   +1 more source

May the Force (Field) Be with You: On the Importance of Conformational Searches in the Prediction of NMR Chemical Shifts

open access: yesMarine Drugs, 2022
NMR data prediction is increasingly important in structure elucidation. The impact of force field selection was assessed, along with geometry and energy cutoffs.
Cristina Cuadrado   +2 more
doaj   +1 more source

Advancing peptide siRNA-carrier designs through L/D-amino acid stereochemical modifications to enhance gene silencing

open access: yesMolecular Therapy: Nucleic Acids, 2021
The 599 peptide has been previously shown to effectively deliver small interfering RNAs (siRNAs) to cancer cells, inducing targeted-oncogene silencing, with a consequent inhibition of tumor growth. Although effective, this study was undertaken to advance
Charles E. Holjencin   +10 more
doaj   +1 more source

[1,3]/[1,4]-Sulfur atom migration in β-hydroxyalkylphosphine sulfides

open access: yesBeilstein Journal of Organic Chemistry, 2020
β-Hydroxyalkylphosphine sulfides undergo [1,3]- or [1,4]-sulfur atom phosphorus-to-carbon migration in the presence of Lewis or Brønsted acids. The direction of sulfur atom migration depends on the type of acid used for the reaction. In the presence of a
Katarzyna Włodarczyk   +2 more
doaj   +1 more source

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