Evidence map›Paper›PMID 34318659›Full record

ArticleJournal of the American Chemical Society2021

Practical and Regioselective Synthesis of C-4-Alkylated Pyridines.

Jin Choi, Gabriele Laudadio, Edouard Godineau, Phil S Baran

Abstract read
In one paragraph

Article in Journal of the American Chemical Society, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing 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

22 citing papers in PubMed.

  1. Pyridine C─N Transposition via Cycloaddition-Cycloreversion.Angewandte Chemie (International ed. in English) · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Functionalization of Pyridines at the C4 Position via Metalation and Capture.Angewandte Chemie (International ed. in English) · 2025
    Article
  10. Review
  11. Phosphite mediated molecular editingChemical science · 2025
    Article
  12. Polysubstituted Pyridines from 1,4-Oxazinone Precursors.The Journal of organic chemistry · 2024
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Journal of the American Chemical Society · 2024
    Article
  18. Review
  19. Article
  20. 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

4 authors.

Jin ChoiDepartment of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States.ORCID 0000-0001-5759-8419
Gabriele LaudadioDepartment of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States.ORCID 0000-0002-2749-8393
Edouard GodineauProcess Research, Syngenta Crop Protection, Schaffhauserstrasse 101, CH-4332 Stein, Switzerland.ORCID 0000-0002-5958-4317
Phil S BaranDepartment of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States.ORCID 0000-0001-9193-9053

Funding

Scalable Synthesis and New Bond DisconnectionsR35GM118176 · NIGMS · SCRIPPS RESEARCH INSTITUTE, THE · PI BARAN, PHIL S · 2016 to 2025
$11.5M
NIGMS NIH HHS R35 GM118176
6 · The paper itself

Abstract

The direct position-selective C-4 alkylation of pyridines has been a long-standing challenge in heterocyclic chemistry, particularly from pyridine itself. Historically this has been addressed using prefunctionalized materials to avoid overalkylation and mixtures of regioisomers. This study reports the invention of a simple maleate-derived blocking group for pyridines that enables exquisite control for Minisci-type decarboxylative alkylation at C-4 that allows for inexpensive access to these valuable building blocks. The method is employed on a variety of different pyridines and carboxylic acid alkyl donors, is operationally simple and scalable, and is applied to access known structures in a rapid and inexpensive fashion. Finally, this work points to an interesting strategic departure for the use of Minisci chemistry at the earliest possible stage (native pyridine) rather than current dogma that almost exclusively employs Minisci chemistry as a late-stage functionalization technique.

Indexed as

AlkylationCarboxylic AcidsMolecular StructurePyridinesStereoisomerismCarboxylic AcidsPyridines

Identifiers

PMID34318659
PMCPMC8721863

What OpenQuestion holds

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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.