Evidence map›Paper›PMID 34708502›Full record

ArticleAngewandte Chemie (International ed. in English)2022

Crossed Regio- and Enantioselective Iron-Catalyzed [4+2]-Cycloadditions of Unactivated Dienes.

Elena Braconi, Nicolai Cramer

Abstract read
In one paragraph

Article in Angewandte Chemie (International ed. in English), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

  1. Review
  2. Article
  3. JACS Au · 2023
    Article
  4. Review
  5. 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

2 authors.

Elena BraconiInstitute of Chemical Sciences and Engineering (ISIC), EPFL SB ISIC LCSA, BCH 4305, 1015, Lausanne, Switzerland.
Nicolai CramerInstitute of Chemical Sciences and Engineering (ISIC), EPFL SB ISIC LCSA, BCH 4305, 1015, Lausanne, Switzerland.ORCID 0000-0001-5740-8494

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 175507
6 · The paper itself

Abstract

The cyclohexene motif is ubiquitous in nature and specialty chemicals. A straightforward selective access to chiral cyclohexenes from unactivated dienes and dienophiles is not feasible by classical Diels-Alder reaction and constitutes an unsolved synthetic challenge. We report a mild and enantioselective iron-catalyzed cross-[4+2]-cycloaddition of unactivated dienes providing access to chiral 1,3-substituted vinyl-cyclohexenes. The development of bis-dihydroisoquinoline ligands was vital to obtain iron complexes that display high reactivities and excellent chemo-, regio- and enantioselectivities towards the targeted cyclohexenes. A range of diene substrates is well accommodated including feedstocks like butadiene, isoprene and myrcene. The structures of different iron complexes are mapped by X-ray crystallographic analysis and linked to their performance.

Indexed as

[4+2]-cycloadditionsasymmetric catalysischiral α-diimine ligandscyclohexenesiron

Identifiers

PMID34708502
PMCPMC9299977

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.