Chiral NMR analysis reveals the environmental dependence of areolal scalemization in Piptothrix areolare.
Sign Up to like & getrecommendations! Published in 2022 at "Chirality"
DOI: 10.1002/chir.23436
Abstract: The occurrence of racemic and enantiomerically enriched (scalemic) mixtures of secondary metabolites in their natural sources is a rare phenomenon. The unprecedent case of enantiomeric variations from levorotatory to dextrorotatory, and back to levorotatory, passing… read more here.
Keywords: piptothrix areolare; nmr analysis; chiral nmr; analysis ... See more keywords
Phosphorous NMR Analysis and Activity of Chiral BINAP-Silver Complexes.
Sign Up to like & getrecommendations! Published in 2022 at "ChemPlusChem"
DOI: 10.1002/cplu.202200217
Abstract: Chiral Ag-atropisomeric ligand species were studied in solution at different temperatures by 31 P-NMR spectroscopy. The analysis and understanding of key parameters in Ag-BINAP complexes were considered in the context of an enantioselective transformation. An… read more here.
Keywords: chiral binap; analysis activity; nmr analysis; activity chiral ... See more keywords
NMR and GC/MS analysis of industrial chloroparaffin mixtures
Sign Up to like & getrecommendations! Published in 2020 at "Analytical and Bioanalytical Chemistry"
DOI: 10.1007/s00216-020-02720-7
Abstract: Chlorinated paraffins (CPs) are high-volume chemicals used worldwide in various industries as plasticizers, lubricants, and flame retardants. CPs are produced by chlorination of alkane mixtures which leads to complex products of thousands of homologs and… read more here.
Keywords: analysis; industrial chloroparaffin; chlorine content; two dimensional ... See more keywords
4-Imidazol-1-yl-butane-1-sulfonic acid or a novel liquid salt? The NMR analysis and dual solvent-catalytic efficiency for one-pot synthesis of xanthenes
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Molecular Liquids"
DOI: 10.1016/j.molliq.2019.01.041
Abstract: Abstract The reaction of the equimolar mixture of imidazole and 1,4-butane sultone was performed at 90 °C in ethylbenzene for 12 h, and the structure of the product was investigated by the NMR analysis in CD3OD and… read more here.
Keywords: imidazol butane; liquid salt; nmr analysis; salt ... See more keywords
HPLC-SPE-NMR analysis of furanosesquiterpenoids from bark exudates of Commiphora swynnertonii Burrt
Sign Up to like & getrecommendations! Published in 2020 at "Phytochemistry Letters"
DOI: 10.1016/j.phytol.2020.06.006
Abstract: Abstract Bark exudate of the tree Commiphora swynnertonii Burtt. (Burseraceae) is used by ethnic groups in Northern Tanzania and Southern Kenya, to treat various diseases in humans and to kill ectoparasites infesting livestock. The acaricidal… read more here.
Keywords: hplc spe; bark; commiphora swynnertonii; nmr analysis ... See more keywords
Detection of enantiomers of chiral primary amines by 1H NMR analysis via enamine formation with an enantiopure γ-position aldol product of a β-keto ester
Sign Up to like & getrecommendations! Published in 2018 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2018.04.079
Abstract: Abstract A 1H NMR analysis method that detects enantiomers of molecules bearing a primary amino group has been developed. The method uses a β-keto ester-derived probe that forms enamines with the amines and is able… read more here.
Keywords: enantiomers chiral; detection enantiomers; keto ester; chiral primary ... See more keywords
Integration of Genomic Data with NMR Analysis Enables Assignment of the Full Stereostructure of Neaumycin B, a Potent Inhibitor of Glioblastoma from a Marine-Derived Micromonospora.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.8b04848
Abstract: The microbial metabolites known as the macrolides are some of the most successful natural products used to treat infectious and immune diseases. Describing the structures of these complex metabolites, however, is often extremely difficult due… read more here.
Keywords: stereostructure; full stereostructure; analysis; stereostructure neaumycin ... See more keywords
Reference-free NOE NMR analysis†
Sign Up to like & getrecommendations! Published in 2020 at "Chemical Science"
DOI: 10.1039/d0sc02970j
Abstract: Nuclear Overhauser Effect (NOE) methods in NMR are an important tool for 3D structural analysis of small molecules. Quantitative NOE methods conventionally rely on reference distances, known distances that have to be spectrally separated and… read more here.
Keywords: noe nmr; free noe; analysis; reference ... See more keywords
NMR analysis of the enantiomeric purity of chiral diols by a new chiral boron agent
Sign Up to like & getrecommendations! Published in 2022 at "RSC Advances"
DOI: 10.1039/d2ra00428c
Abstract: A new boric agent with bridged structure, boric acid D, was first synthesized and used as an excellent chiral derivative agent for highly efficient enantiodiscrimination of various diols. The derivatization reaction is fast and complete,… read more here.
Keywords: enantiomeric purity; nmr analysis; chiral diols; agent ... See more keywords
Quantitative NMR analysis of the kinetics of prenucleation oligomerization and aggregation of pathogenic huntingtin exon-1 protein
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2207690119
Abstract: Significance Huntington’s disease is a fatal neurodegenerative condition caused by polyglutamine expansion (≥35) in the N-terminal region of the huntingtin protein encoded by exon-1 (httex1), resulting in fibril accumulation within neuronal inclusion bodies. Microsecond-timescale reversible… read more here.
Keywords: oligomerization; nmr analysis; quantitative nmr; huntingtin ... See more keywords
High-resolution liquid chromatography mass spectrometry (HR-LCMS) and 1H NMR analysis of methanol extracts from marine seaweed Gracilaria edulis.
Sign Up to like & getrecommendations! Published in 2022 at "Natural product research"
DOI: 10.1080/14786419.2022.2146906
Abstract: A wide variety of bioactive secondary metabolites that seaweeds are claimed to generate can be used by the pharmaceutical industry to create novel medications. The primary goal of the current study was to use the… read more here.
Keywords: lcms nmr; nmr analysis; resolution liquid; high resolution ... See more keywords