نتایج جستجو برای: fluorine compounds

تعداد نتایج: 232995  

Journal: :Journal of Japan Oil Chemists' Society 1986

Journal: :Journal of Synthetic Organic Chemistry, Japan 1971

Journal: :Magnetic resonance in chemistry : MRC 2014
Guilherme Dal Poggetto Denize C Favaro Mathias Nilsson Gareth A Morris Cláudio F Tormena

NMR is a powerful method for identification and quantification of drug components and contaminations. These problems present themselves as mixtures, and here, one of the most powerful tools is DOSY. DOSY works best when there is no spectral overlap between components, so drugs containing fluorine substituents are well-suited for DOSY analysis as (19)F spectra are typically very sparse. Here, we...

Journal: :Journal of Research of the National Bureau of Standards 1941

Journal: :Chemical communications 2009
Xiao Han Jie Luo Chen Liu Yixin Lu

Organocatalytic asymmetric Michael reactions of fluorinated nucleophiles with nitroolefins catalyzed by Cinchona alkaloid-derived thiourea catalysts generated the desired Michael products containing vicinal fluorinated quaternary and tertiary chiral centers with exceptional enantioselectivity.

2017
Piyush Panini Deepak Chopra

Due to the unpredictable nature of organic fluorine in its participation in the formation of different supramolecular motifs which concomitantly influences the physicochemical properties of the compounds of interest, the study of noncovalent interactions involving organic fluorine will always be an expanding area of research amongst the scientific community. The participation of organic fluorin...

Journal: :Science 2013
Mark C Walker Benjamin W Thuronyi Louise K Charkoudian Brian Lowry Chaitan Khosla Michelle C Y Chang

Organofluorines represent a rapidly expanding proportion of molecules that are used in pharmaceuticals, diagnostics, agrochemicals, and materials. Despite the prevalence of fluorine in synthetic compounds, the known biological scope is limited to a single pathway that produces fluoroacetate. Here, we demonstrate that this pathway can be exploited as a source of fluorinated building blocks for i...

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