Evidence map›Paper›PMID 33961350›Full record

ArticleChemSusChem2021

Direct Catalytic N-Alkylation of α-Amino Acid Esters and Amides Using Alcohols with High Retention of Stereochemistry.

Tao Yan, Ben L Feringa, Katalin Barta

Abstract read
In one paragraph

Article in ChemSusChem, 2021. 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. Article
  2. Molybdenum-Catalyzed Asymmetric Amination of α-Hydroxy Esters: Synthesis of α-Amino Acids.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article
  3. Bio-Based Surfactants via Borrowing Hydrogen Catalysis.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025
    Article
  4. Article
  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

3 authors.

Tao YanStratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen (The, Netherlands.
Ben L FeringaStratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen (The, Netherlands.
Katalin BartaStratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen (The, Netherlands.ORCID http://orcid.org/0000-0002-8046-4248

Funding

H2020 Excellent Science ERC Starting Grant 2015, CatASus 638076
6 · The paper itself

Abstract

The direct functionalization of naturally abundant chiral scaffolds such as α-amino acid esters or amides with widely abundant alcohols, without any racemization, is a demanding transformation that is of central importance for the synthesis of bio-active compounds. Herein a robust and general method was developed for the direct N-alkylation of α-amino acid esters and amides with alcohols. This powerful ruthenium-catalyzed methodology is atom-economic, base-free, and allowed for excellent retention of stereochemical integrity. The use of diphenylphosphate as additive was crucial for significantly enhancing reactivity and product selectivity. Notably, the only by-product was water and both substrates could be potentially derived from renewable resources.

Indexed as

amino acid estersborrowing hydrogenchiralityN-alkylationRu catalysis

Identifiers

PMID33961350
PMCPMC8252633

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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.