Evidence map›Paper›PMID 33349693›Full record

ArticleNature chemistry2021

Mimicking oxidative radical cyclizations of lignan biosynthesis using redox-neutral photocatalysis.

Zheng Huang, Jean-Philip Lumb

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Article in Nature chemistry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Cyclization by Intramolecular Suzuki-Miyaura Cross-Coupling-A Review.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025
    Review
  6. Mechanisms for radical reactions initiating fromBeilstein journal of organic chemistry · 2024
    Article
  7. Review
  8. Article
  9. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors.

Zheng HuangDepartment of Chemistry, McGill University, Montreal, Quebec, Canada.ORCID http://orcid.org/0000-0002-2727-9502
Jean-Philip LumbDepartment of Chemistry, McGill University, Montreal, Quebec, Canada. jean-philip.lumb@mcgill.ca.ORCID http://orcid.org/0000-0002-9283-1199

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Oxidative cyclizations create many unique chemical structures that are characteristic of biologically active natural products. Many of these reactions are catalysed by 'non-canonical' or 'thwarted' iron oxygenases and appear to involve long-lived radicals. Mimicking these biosynthetic transformations with chemical equivalents has been a long-standing goal of synthetic chemists but the fleeting nature of radicals, particularly under oxidizing conditions, makes this challenging. Here we use redox-neutral photocatalysis to generate radicals that are likely to be involved in the biosynthesis of lignan natural products. We present the total syntheses of highly oxidized dibenzocyclooctadienes, which feature densely fused, polycyclic frameworks that originate from a common radical progenitor. We show that multiple factors control the fate of the proposed biosynthetic radicals, as they select between 5- or 11-membered ring cyclizations and a number of different terminating events. Our syntheses create new opportunities to explore the medicinal properties of these natural products, while shedding light on their biosynthetic origin.

Indexed as

Biological ProductsBiomimetic MaterialsCatalysisCrystallography, X-RayCyclizationCyclooctanesFree RadicalsIridiumLightLignansMolecular ConformationOxidation-ReductionRutheniumSchisandraceaeStereoisomerismBiological ProductsCyclooctanesdibenzocyclooctadieneFree RadicalsIridiumLignansRuthenium

Identifiers

What OpenQuestion holds

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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.