Evidence map›Paper›PMID 33289954›Full record

ArticleAngewandte Chemie (International ed. in English)2021

Collective Total Synthesis of Casbane Diterpenes: One Strategy, Multiple Targets.

Lorenz E Löffler, Conny Wirtz, Alois Fürstner

Abstract 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 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing 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

24 citing papers in PubMed.

  1. Article
  2. Article
  3. Synthesis of depressin, cryptomeridiol and 4-Beilstein journal of organic chemistry · 2026
    Article
  4. Article
  5. Iron-Catalyzed trans-Hydrostannation of Terminal Alkynes.Angewandte Chemie (International ed. in English) · 2025
    Article
  6. Pharmaceuticals (Basel, Switzerland) · 2024
    Review
  7. Journal of the American Chemical Society · 2024
    Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Total Syntheses of Nominal and Actual Prorocentin.Journal of the American Chemical Society · 2023
    Article
  13. Article
  14. Article
  15. Total Syntheses of Scabrolide A and Nominal Scabrolide B.Journal of the American Chemical Society · 2022
    Article
  16. Regioselective trans-Hydrostannation of Boron-Capped Alkynes.Chemistry (Weinheim an der Bergstrasse, Germany) · 2021
    Article
  17. Late-Stage Diversification: A Motivating Force in Organic Synthesis.Journal of the American Chemical Society · 2021
    Article
  18. Article
  19. The Ascent of Alkyne Metathesis to Strategy-Level Status.Journal of the American Chemical Society · 2021
    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

3 authors.

Lorenz E LöfflerMax-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany.
Conny WirtzMax-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany.
Alois FürstnerMax-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany.ORCID 0000-0003-0098-3417

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Of the more than 100 casbane diterpenes known to date, only the eponymous parent hydrocarbon casbene itself has ever been targeted by chemical synthesis. Outlined herein is a conceptually new approach that brings not a single but a variety of casbane derivatives into reach, especially the more highly oxygenated and arguably more relevant members of this family. The key design elements are a catalyst-controlled intramolecular cyclopropanation with or without subsequent equilibration, chain extension of the resulting stereoisomeric cyclopropane building blocks by chemoselective hydroboration/cross-coupling, and the efficient closure of the strained macrobicyclic framework by ring-closing alkyne metathesis. A hydroxy-directed catalytic trans-hydrostannation allows for late-stage diversity. These virtues are manifested in the concise total syntheses of depressin, yuexiandajisu A, and ent-pekinenin C. The last compound turned out to be identical to euphorhylonal A, the structure of which had clearly been misassigned.

Indexed as

alkyne metathesiscyclopropaneshydrostannationmacrocyclesterpenes

Identifiers

PMID33289954
PMCPMC7986786

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.