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Literature DB >> 18251549

13C INEPT diffusion-ordered NMR spectroscopy (DOSY) with internal references.

Deyu Li¹, Russell Hopson, Weibin Li, Jia Liu, Paul G Williard.

Abstract

13C INEPT Diffusion-ordered NMR spectroscopy (DOSY) with an internal reference system was developed to study the aggregation state of THF-solvated LDA dimeric complex. Six components are clearly identified in the diffusion dimension, and their DOSY-generated 13C INEPT spectrum slices agree extremely well with their respective INEPT spectra. The correlation between log D and log FW of the linear least-squares fit to reference points of all components is exceptionally high: (r = 0.9985).

Entities: Chemical

Mesh：

Substances：

Year: 2008 PMID： 18251549 PMCID： PMC3220947 DOI： 10.1021/ol703039v

Source DB: PubMed Journal: Org Lett ISSN： 1523-7052 Impact factor: 6.005

19 in total

1. Aggregation and C-N rotation of the lithium salt of N,N-dimethyldiphenylacetamide.

Authors: Y J Kim; A Streitwieser; A Chow; G Fraenkel
Journal: Org Lett Date: 1999-12-30 Impact factor: 6.005

2. Characterization of reactive intermediates by diffusion-ordered NMR spectroscopy: a snapshot of the reaction of (13)CO(2) with [Cp(2)Zr(Cl)H].

Authors: Nils E Schlörer; Eurico J Cabrita; Stefan Berger
Journal: Angew Chem Int Ed Engl Date: 2002-01-04 Impact factor: 15.336

3. Protein molecular weight standards can compensate systematic errors in diffusion-ordered spectroscopy.

Authors: Patrick Groves; Małgorzata Palczewska; M Dolores Molero; Gyula Batta; F Javier Cañada; Jesús Jiménez-Barbero
Journal: Anal Biochem Date: 2004-08-15 Impact factor: 3.365

4. Pure shift proton DOSY: diffusion-ordered 1H spectra without multiplet structure.

Authors: Mathias Nilsson; Gareth A Morris
Journal: Chem Commun (Camb) Date: 2007-01-31 Impact factor: 6.222

5. Lithium diisopropylamide-mediated ortholithiation and anionic fries rearrangement of aryl carbamates: role of aggregates and mixed aggregates.

Authors: Kanwal Jit Singh; David B Collum
Journal: J Am Chem Soc Date: 2006-10-25 Impact factor: 15.419

6. Lithium diisopropylamide-mediated enolization: catalysis by hemilabile ligands.

Authors: Antonio Ramirez; Xiufeng Sun; David B Collum
Journal: J Am Chem Soc Date: 2006-08-09 Impact factor: 15.419

Review 7. Lithium diisopropylamide: solution kinetics and implications for organic synthesis.

Authors: David B Collum; Anne J McNeil; Antonio Ramirez
Journal: Angew Chem Int Ed Engl Date: 2007 Impact factor: 15.336

8. Diastereoselective alkylation of beta-amino esters: structural and rate studies reveal alkylations of hexameric lithium enolates.

Authors: Anne J McNeil; Gilman E S Toombes; Sol M Gruner; Emil Lobkovsky; David B Collum; Sithamalli V Chandramouli; Benoit J Vanasse; Timothy A Ayers
Journal: J Am Chem Soc Date: 2004-12-22 Impact factor: 15.419

4. Accurate molecular weight determination of small molecules via DOSY-NMR by using external calibration curves with normalized diffusion coefficients.

Authors: Roman Neufeld; Dietmar Stalke
Journal: Chem Sci Date: 2015-03-19 Impact factor: 9.825

4 in total

13C INEPT diffusion-ordered NMR spectroscopy (DOSY) with internal references.

1. Aggregation and C-N rotation of the lithium salt of N,N-dimethyldiphenylacetamide.

2. Characterization of reactive intermediates by diffusion-ordered NMR spectroscopy: a snapshot of the reaction of (13)CO(2) with [Cp(2)Zr(Cl)H].

3. Protein molecular weight standards can compensate systematic errors in diffusion-ordered spectroscopy.

4. Pure shift proton DOSY: diffusion-ordered 1H spectra without multiplet structure.

5. Lithium diisopropylamide-mediated ortholithiation and anionic fries rearrangement of aryl carbamates: role of aggregates and mixed aggregates.

6. Lithium diisopropylamide-mediated enolization: catalysis by hemilabile ligands.

Review 7. Lithium diisopropylamide: solution kinetics and implications for organic synthesis.

8. Diastereoselective alkylation of beta-amino esters: structural and rate studies reveal alkylations of hexameric lithium enolates.

9. Amine- and ether-chelated aryllithium reagents-structure and dynamics.

10. Characterization of beta-amino ester enolates as hexamers via 6Li NMR spectroscopy.

1. Application of (1)H DOSY for Facile Measurement of Polymer Molecular Weights.

2. Formula weight prediction by internal reference diffusion-ordered NMR spectroscopy (DOSY).

3. Characterization of reactive intermediates by multinuclear diffusion-ordered NMR spectroscopy (DOSY).

4. Accurate molecular weight determination of small molecules via DOSY-NMR by using external calibration curves with normalized diffusion coefficients.