A Quantitative NMR Method for Silyllithium Analysis

Synlett ◽  
2017 ◽  
Vol 28 (18) ◽  
pp. 2449-2452
Author(s):  
Scott Sieburth ◽  
Yingjian Bo
Keyword(s):  
Proton Nmr ◽  
Relative Quantification ◽  
Nmr Analysis ◽  
Quantitative Nmr ◽  
Simple Method ◽  
Nmr Method

A rapid and extremely simple method for silyl anion analysis is presented. The progress of silyllithium reagent preparation can be determined by quenching an aliquot with neat chloro(trimethyl)silane, evaporation, dilution with CDCl3, and direct proton NMR analysis. This procedure is fast, simple, and allows for identification and relative quantification of the starting reagent, intermediates, and the silyllithium product.

Sequential injection analysis coupled to on-line benchtop proton NMR: Method development and application to the determination of synthetic cathinones in seized drug samples

Talanta ◽  
2021 ◽  
Vol 231 ◽  
pp. 122355
Author(s):  
Timothy J. Trinklein ◽  
Malati Thapa ◽  
Lexie A. Lanphere ◽  
John A. Frost ◽  
Sandra M. Koresch ◽  
...  
Keyword(s):  
Method Development ◽  
Proton Nmr ◽  
Synthetic Cathinones ◽  
Sequential Injection Analysis ◽  
Sequential Injection ◽  
Nmr Method ◽  
On Line

scholarly journals NMR lipid profiles of cells, tissues, and body fluids: proton NMR analysis of human erythrocyte lipids.

1994 ◽  
Vol 35 (11) ◽  
pp. 1925-1931
Author(s):  
R K Adosraku ◽  
G T Choi ◽  
V Constantinou-Kokotos ◽  
M M Anderson ◽  
W A Gibbons
Keyword(s):  
Human Erythrocyte ◽  
Proton Nmr ◽  
Body Fluids ◽  
Lipid Profiles ◽  
Nmr Analysis ◽  
Erythrocyte Lipids

scholarly journals Quantitative NMR analysis of the protein G B1 domain in Xenopus laevis egg extracts and intact oocytes

2006 ◽  
Vol 103 (32) ◽  
pp. 11904-11909 ◽  
Author(s):  
P. Selenko ◽  
Z. Serber ◽  
B. Gadea ◽  
J. Ruderman ◽  
G. Wagner
Keyword(s):  
Xenopus Laevis ◽  
Protein G ◽  
Nmr Analysis ◽  
Quantitative Nmr ◽  
B1 Domain ◽  
Egg Extracts

A two-dimensional NMR method for assignment of deoxyribose proton NMR signals in d(ApGpCpT)

1984 ◽  
Vol 121 (3) ◽  
pp. 1021-1026 ◽  
Author(s):  
Kofen Lai ◽  
Dinesh O. Shah ◽  
Eugene DeRose ◽  
David G. Gorenstein
Keyword(s):  
Proton Nmr ◽  
Two Dimensional ◽  
Nmr Method ◽  
Nmr Signals

Polyhydroxyalkanoate quantification in organic wastes and pure cultures using a single-step extraction and 1H NMR analysis

2012 ◽  
Vol 66 (5) ◽  
pp. 1000-1006 ◽  
Author(s):  
Elisabeth Linton ◽  
Asif Rahman ◽  
Sridhar Viamajala ◽  
Ronald C. Sims ◽  
Charles D. Miller
Keyword(s):  
1H Nmr ◽  
Azotobacter Vinelandii ◽  
Nile Blue ◽  
Agricultural Waste ◽  
Accurate Method ◽  
Single Step ◽  
Proton Nuclear Magnetic Resonance ◽  
Copolymer Composition ◽  
Nmr Analysis ◽  
Nmr Method

In this study, a proton nuclear magnetic resonance (1H NMR) method was developed to quantitatively analyze polyhydroxyalkanoate (PHA) content in Cupriavidus necator H16, Azotobacter vinelandii AvOP, and mixed microbial cultures from the effluent of an agricultural waste treatment anaerobic digester. In contrast to previous methods, a single-step PHA extractive method using deuterated chloroform was established, thereby facilitating direct 1H NMR analysis. The accuracy of the method was verified through comparison with well-established gas chromatography (GC) methanolysis techniques. Nile blue fluorescence staining was also carried out to serve as an independent and qualitative indicator of intracellular PHA content. The results indicate that the 1H NMR method is appropriate for rapid and non-destructive quantification of overall PHA content and determination of PHA copolymer composition in a variety of cultures. Notably, this technique was effective in measuring PHA content in full-strength waste samples where high concentrations of background impurities and organic compounds are present. The straightforward procedures minimize error-introducing steps, require less time and materials, and result in an accurate method suitable for routine analyses.

Quantitative NMR Analysis of a Four‐Component Mixture of Phenylglycine Derivatives

1976 ◽  
Vol 65 (5) ◽  
pp. 738-740 ◽  
Author(s):  
R.J. Warren ◽  
J.E. Zarembo ◽  
D.B. Staiger ◽  
A. Post
Keyword(s):  
Nmr Analysis ◽  
Quantitative Nmr ◽  
Component Mixture

scholarly journals Investigation of Analysis Conditions for Accurate Quantitative NMR Analysis

2012 ◽  
Vol 61 (11) ◽  
pp. 963-967 ◽  
Author(s):  
Taichi YAMAZAKI ◽  
Takeshi SAITO ◽  
Tooru MIURA ◽  
Toshihide IHARA
Keyword(s):  
Nmr Analysis ◽  
Quantitative Nmr

The chemistry of 2-methyltetrahydropyran-4-one: An L-Selectride reaction that gives predominantly the equatorial alcohol

1978 ◽  
Vol 56 (6) ◽  
pp. 789-793 ◽  
Author(s):  
Donald C. Wigfield ◽  
Steve Feiner
Keyword(s):  
Proton Nmr ◽  
Reducing Agents ◽  
Cyclic Ether ◽  
Nmr Analysis ◽  
Ether Oxygen

The stereoisomers of 2-methyltetrahydropyran-4-ol have been separated and identified by carbon-13 and proton nmr analysis of the trideuteriomethyl-2,6,6-trideuterio analogue. Stereoisomeric product ratios of reduction of 2-methyltetrahydropyran-4-one (1) by NaBH4, KBH4, L-Selectride, K-Selectride, and LiBH(nBu)3 have been determined and compared with reductions of 3-methylcyclohexanone. Product ratios in the reduction of the two substrates by the borohydride reducing agents are similar but are quite different in the reduction by the Selectride reducing agents, 1 being reduced by Selectride to give 73% equatorialalcohol. Two possible mechanisms of reduction of 1 are proposed, involving intramolecular assistance by the cyclic ether oxygen.

Dual standard addition for quantitative NMR analysis

1974 ◽  
Vol 6 (8) ◽  
pp. 452-453 ◽  
Author(s):  
A. F. Cockerill ◽  
R. C. Harden ◽  
G. L. O. Davies ◽  
D. M. Rackham
Keyword(s):  
Standard Addition ◽  
Nmr Analysis ◽  
Quantitative Nmr
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