Evidence map›Paper›PMID 15792725›Full record

ArticleJournal of the American Society for Mass Spectrometry2005

Elucidation of the presence and location of t-Boc protecting groups in amines and dipeptides using on-column H/D exchange HPLC/ESI/MS.

Christian Wolf, Cristina N Villalobos, Paul G Cummings, Sonya Kennedy-Gabb, Mark A Olsen, Gudrun Trescher

Abstract read
PubMed Publisher
In one paragraph

Article in Journal of the American Society for Mass Spectrometry, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Rapid detection ofForensic toxicology · 2018
    Article
  5. Article
  6. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Christian WolfChemistry Department, Georgetown University, Washington, District of Columbia 20057, USA. cw27@georgetown.edu
Cristina N Villalobos
Paul G Cummings
Sonya Kennedy-Gabb
Mark A Olsen
Gudrun Trescher

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

High performance liquid chromatography/mass spectrometry (HPLC/MS) has become a widely used technique for routine analysis of pharmaceutical compounds. The constant search for new drugs requires the development of time-efficient methods that can be employed in high-throughput screening of combinatorial libraries of a variety of compounds, including amines and peptides. Conventional HPLC/MS is a powerful technique that can easily be automated and is suitable for comprehensive screening purposes. However, the unequivocal determination of the presence and location of important carbamoyl protecting groups of amines is often elusive because of their inherent instability under MS conditions. In this study, the use of on-column H/D exchange HPLC/ESI/MS for structure elucidation of t-Boc protecting groups which can often not be detected by MS because of facile McLafferty rearrangement has been examined. We demonstrate that employing a deuterated mobile phase in HPLC/MS analysis provides a convenient tool for the determination of the absence or presence of t-Boc protecting groups in amines and peptides.

Indexed as

Chromatography, High Pressure LiquidCombinatorial Chemistry TechniquesAminesDipeptidesIndicators and ReagentsPeptide LibrarySpectrometry, Mass, Electrospray IonizationAminesDipeptidesIndicators and ReagentsPeptide Library

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.