Evidence map›Paper›PMID 26418572›Full record

ArticleJournal of the American Chemical Society2015

Ruthenium Catalyzed Diastereo- and Enantioselective Coupling of Propargyl Ethers with Alcohols: Siloxy-Crotylation via Hydride Shift Enabled Conversion of Alkynes to π-Allyls.

Tao Liang, Wandi Zhang, Te-Yu Chen, Khoa D Nguyen, Michael J Krische

Abstract read
In one paragraph

Article in Journal of the American Chemical Society, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing 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

23 citing papers in PubMed.

  1. Article
  2. Article
  3. Journal of the American Chemical Society · 2025
    Article
  4. Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Reductive C-C CouplingCurrent opinion in green and sustainable chemistry · 2017
    Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Versatile Homoallylic Boronates by Chemo-, SAngewandte Chemie (International ed. in English) · 2017
    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

5 authors.

Tao LiangDepartment of Chemistry, University of Texas at Austin , 1 University Station, Welch Hall A5300, Austin, Texas 78712, United States.
Wandi ZhangDepartment of Chemistry, University of Texas at Austin , 1 University Station, Welch Hall A5300, Austin, Texas 78712, United States.
Te-Yu ChenDepartment of Chemistry, University of Texas at Austin , 1 University Station, Welch Hall A5300, Austin, Texas 78712, United States.
Khoa D NguyenDepartment of Chemistry, University of Texas at Austin , 1 University Station, Welch Hall A5300, Austin, Texas 78712, United States.
Michael J KrischeDepartment of Chemistry, University of Texas at Austin , 1 University Station, Welch Hall A5300, Austin, Texas 78712, United States.

Funding

Substituted Piperidine Formation via C-C Bond Forming Transfer HydrogenationR01GM069445 · NIGMS · UNIVERSITY OF TEXAS AUSTIN · PI KRISCHE, MICHAEL J · 2005 to 2024
$6.7M
NIGMS NIH HHS R01 GM069445NIGMS NIH HHS R01-GM069445
6 · The paper itself

Abstract

The first enantioselective carbonyl crotylations through direct use of alkynes as chiral allylmetal equivalents are described. Chiral ruthenium(II) complexes modified by Josiphos (SL-J009-1) catalyze the C-C coupling of TIPS-protected propargyl ether 1a with primary alcohols 2a-2o to form products of carbonyl siloxy-crotylation 3a-3o, which upon silyl deprotection-reduction deliver 1,4-diols 5a-5o with excellent control of regio-, anti-diastereo-, and enantioselectivity. Structurally related propargyl ethers 1b and 1c bearing ethyl- and phenyl-substituents engage in diastereo- and enantioselective coupling, as illustrated in the formation of adducts 5p and 5q, respectively. Selective mono-tosylation of diols 5a, 5c, 5e, 5f, 5k, and 5m is accompanied by spontaneous cyclization to deliver the trans-2,3-disubstituted furans 6a, 6c, 6e, 6f, 6k, and 6m, respectively. Primary alcohols 2a, 2l, and 2p were converted to the siloxy-crotylation products 3a, 3l, and 3p, which upon silyl deprotection-lactol oxidation were transformed to the trans-4,5-disubstituted γ-butyrolactones 7a, 7l, and 7p. The formation of 7p represents a total synthesis of (+)-trans-whisky lactone. Unlike closely related ruthenium catalyzed alkyne-alcohol C-C couplings, deuterium labeling studies provide clear evidence of a novel 1,2-hydride shift mechanism that converts metal-bound alkynes to π-allyls in the absence of intervening allenes.

Indexed as

AlcoholsAlkynesCatalysisEthersRutheniumSiloxanesStereoisomerismAlcoholsAlkynesEtherspropargyl etherRutheniumSiloxanes

Identifiers

PMID26418572
PMCPMC4688008

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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.