Evidence map›Paper›PMID 30559370›Full record

ArticleNature chemistry2019

The reductive C3 functionalization of pyridinium and quinolinium salts through iridium-catalysed interrupted transfer hydrogenation.

Alexandru Grozavu, Hamish B Hepburn, Philip J Smith, Harish K Potukuchi, Peter J Lindsay-Scott, Timothy J Donohoe

Abstract read
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Article in Nature chemistry, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing 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

29 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Functionalization of Pyridines at the C4 Position via Metalation and Capture.Angewandte Chemie (International ed. in English) · 2025
    Article
  5. Review
  6. Review
  7. Oxidative Dearomatization of Pyridines.Journal of the American Chemical Society · 2024
    Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Interrupted reactions in chemical synthesis.Nature reviews. Chemistry · 2021
    Review
  17. Article
  18. Article
  19. Article
  20. Interrupted Pyridine Hydrogenation: Asymmetric Synthesis of δ-Lactams.Angewandte Chemie (International ed. in English) · 2021
    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.

Alexandru GrozavuDepartment of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK.ORCID http://orcid.org/0000-0003-0378-2047
Hamish B HepburnDepartment of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK.ORCID http://orcid.org/0000-0002-9609-3672
Philip J SmithDepartment of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK.
Harish K PotukuchiDepartment of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK.
Peter J Lindsay-ScottEli Lilly and Company Limited, Erl Wood Manor, Windlesham, Surrey, UK.
Timothy J DonohoeDepartment of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK. timothy.donohoe@chem.ox.ac.uk.ORCID http://orcid.org/0000-0001-7088-6626

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Aromatic rings are ubiquitous in organic chemistry and form the basis of many commercial products. Despite the numerous routes available for the preparation of aromatic compounds, there remain few methods that allow their conversion into synthetically useful partially saturated derivatives and even fewer that allow new C-C bonds to be formed at the same time. Here we set out to address this problem and uncover a unique catalytic partial reduction reaction that forms partially saturated azaheterocycles from aromatic precursors. In this reaction, methanol and formaldehyde are used for the reductive functionalization of pyridines and quinolines using catalytic iridium; thus, inexpensive and renewable feedstocks are utilized in the formation of complex N-heterocycles. By harnessing the formation of a nucleophilic enamine intermediate, the C-C bond-forming process reverses the normal pattern of reactivity and allows access to the C3 position of the arene. Mechanistic investigations using D-labelling experiments reveal the source of hydride added to the ring and show the reversible nature of the iridium-hydride addition.

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Registered trials

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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.