Evidence map›Paper›PMID 29243756›Full record

ArticleOrganic & biomolecular chemistry2018

Concise total synthesis of (+)-asperazine A and (+)-pestalazine B.

Brandon M Nelson, Richard P Loach, Stefan Schiesser, Mohammad Movassaghi

Abstract read
In one paragraph

Article in Organic & biomolecular chemistry, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

  1. Total synthesis of complex 2,5-diketopiperazine alkaloids.The Alkaloids. Chemistry and biology · 2023
    Review
  2. Article
  3. Total synthesis of himastatin.Science (New York, N.Y.) · 2022
    Article
  4. 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.

Brandon M NelsonMassachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA. movassag@mit.edu.
Richard P Loach
Stefan Schiesser
Mohammad Movassaghi

Funding

Synthesis and Study of Dimeric Diketopiperazine AlkaloidsR01GM089732 · NIGMS · MASSACHUSETTS INSTITUTE OF TECHNOLOGY · PI MOVASSAGHI, MOHAMMAD · 2010 to 2021
$4.6M
NIGMS NIH HHS R01 GM089732
6 · The paper itself

Abstract

The highly convergent total synthesis of dimeric diketopiperazine alkaloids (+)-asperazine A and (+)-pestalazine B is described. A critical aspect of our expedient route was the development of a directed regio- and diastereoselective C3-N1' coupling of complex tetracyclic diketopiperazine components. This late-stage heterodimerization reaction was made possible by design of tetracyclic diketopiperazines that allow C3-carbocation coupling of the electrophilic component to the N1' locus of the nucleophilic fragment. The application of this new coupling reaction to the first total synthesis of (+)-asperazine A led to our revision of the sign and magnitude of the optical rotation for the reported structure.

Indexed as

AlkaloidsChemistry Techniques, SyntheticDiketopiperazinesDimerizationIndole AlkaloidsStereoisomerismAlkaloidsasperazine ADiketopiperazinesIndole Alkaloidspestalazine B

Identifiers

PMID29243756
PMCPMC5752586

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.