Evidence map›Paper›PMID 33687781›Full record

ArticleAngewandte Chemie (International ed. in English)2021

Photochemical Carbene Transfer Reactions of Aryl/Aryl Diazoalkanes-Experiment and Theory*.

Sripati Jana, Chao Pei, Claire Empel, Rene M Koenigs

Open access · hybridAbstract read
In one paragraph

Article in Angewandte Chemie (International ed. in English), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
9.1field-weighted citation impact, top 1% of its field
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

18 citing papers in PubMed, 104 citations in OpenAlex.

  1. Article
  2. Article
  3. The Genuine Carbene Conundrum.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025
    Review
  4. Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Photo-Induced Homologation of Carbonyl Compounds for Iterative Syntheses.Angewandte Chemie (International ed. in English) · 2022
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. 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 at 1 institution in 1 country.

Sripati JanaInstitute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.ORCID http://orcid.org/0000-0001-7155-8384
Chao PeiInstitute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.
Claire EmpelInstitute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.ORCID http://orcid.org/0000-0002-9362-7755
Rene M KoenigsInstitute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.ORCID http://orcid.org/0000-0003-0247-4384
RWTH Aachen University · DE

Funding

China Scholarship CouncilDeutsche Forschungsgemeinschaft
6 · The paper itself

Abstract

Controlling the reactivity of carbene intermediates is a key parameter in the development of selective carbene transfer reactions and is usually achieved by metal complexes via singlet metal-carbene intermediates. In this combined experimental and computational studies, we show that the reactivity of free diaryl carbenes can be controlled by the electronic properties of the substituents without the need of external additives. The introduction of electron-donating and -withdrawing groups results in a significant perturbation of singlet triplet energy splitting of the diaryl carbene intermediate and of activation energies of consecutive carbene transfer reactions. This strategy now overcomes a long-standing paradigm in the reactivity of diaryl carbenes and allows the realization of highly chemoselective carbene transfer reactions with alkynes. We could show that free diaryl carbenes can be readily accessed via photolysis of the corresponding diazo compounds and that these carbenes can undergo highly chemoselective cyclopropenation, cascade, or C-H functionalization reactions. Experimental and theoretical mechanistic analyses confirm the participation of different carbene spin states and rationalize for the observed reactivity.

Indexed as

carbeneDFT calculationsphotochemistrysinglettriplet

Identifiers

PMID33687781
PMCPMC8252492
OpenAlexW3134113148

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.