Evidence map›Paper›PMID 32271982›Full record

ArticleAngewandte Chemie (International ed. in English)2020

Total Synthesis of (±)-Phyllantidine: Development and Mechanistic Evaluation of a Ring Expansion for Installation of Embedded Nitrogen-Oxygen Bonds.

Kyle M Lambert, Joshua B Cox, Lin Liu, Amy C Jackson, Sam Yruegas, Kenneth B Wiberg, John L Wood

Abstract read
In one paragraph

Article in Angewandte Chemie (International ed. in English), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Intramolecular N-O Bond Formation for the Synthesis ofJournal of the American Chemical Society · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. A Ring Expansion Approach ToTetrahedron letters · 2022
    Article
  11. Review
  12. 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

7 authors.

Kyle M LambertDepartment of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, TX, 76798, USA.ORCID 0000-0002-8230-2840
Joshua B CoxDepartment of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, TX, 76798, USA.
Lin LiuDepartment of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, TX, 76798, USA.ORCID 0000-0002-3948-5004
Amy C JacksonDepartment of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, TX, 76798, USA.ORCID 0000-0002-9450-1070
Sam YruegasDepartment of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, TX, 76798, USA.
Kenneth B WibergDepartment of Chemistry, Yale University, New Haven, CT, 06520, USA.ORCID 0000-0001-8588-9854
John L WoodDepartment of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, TX, 76798, USA.ORCID 0000-0002-9066-5588

Funding

Method and Strategy Development for the Synthesis of Physiologically Important Natural ProductsR01GM136759 · NIGMS · BAYLOR UNIVERSITY · PI WOOD, JOHN L · 2020 to 2023
$1.3M
Ring Expansions to Access Structurally-Diverse Diketopiperazine AlkaloidsF32GM129969 · NIGMS · BAYLOR UNIVERSITY · PI LAMBERT, KYLE M. · 2018 to 2019
$112k
NIGMS NIH HHS F32 GM129969NIGMS NIH HHS R01 GM136759
6 · The paper itself

Abstract

The development of a concise total synthesis of (±)-phyllantidine (1), a member of the securinega family of alkaloids containing an unusual oxazabicyclo[3.3.1]nonane core, is described. The synthesis employs a unique synthetic strategy featuring the ring expansion of a substituted cyclopentanone to a cyclic hydroxamic acid as a key step that allows facile installation of the embedded nitrogen-oxygen (N-O) bond. The optimization of this sequence to effect the desired regiochemical outcome and its mechanistic underpinnings were assessed both computationally and experimentally. This synthetic approach also features an early-stage diastereoselective aldol reaction to assemble the substituted cyclopentanone, a mild reduction of an amide intermediate without N-O bond cleavage, and the rapid assembly of the butenolide found in (1) via use of the Bestmann ylide.

Indexed as

Chemistry Techniques, SyntheticCyclizationNitrogenOxygenStereoisomerismNitrogenOxygencomputational chemistrynitrogen heterocyclesphyllantidinering expansiontotal synthesis

Identifiers

PMID32271982
PMCPMC7448577

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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.