Subtopic Deep Dive
Phosphorus Ylide Organocatalysis
Research Guide
What is Phosphorus Ylide Organocatalysis?
Phosphorus ylide organocatalysis employs phosphonium ylides as nucleophilic metal-free catalysts for asymmetric C-C bond forming reactions such as Morita-Baylis-Hillman and [3+2] annulations.
This subtopic focuses on P(III)/P(V) redox cycling in catalytic Wittig-type reactions (Longwitz and Werner, 2018, 53 citations) and phosphine-catalyzed three-component couplings (Oe et al., 2012, 4 citations). Researchers design ylides for broad substrate scope and high enantioselectivity. Over 10 papers from 2012-2023 explore ylide mechanisms and sustainable synthesis.
Why It Matters
Ylide organocatalysis enables metal-free C-C bond formations for pharmaceutical intermediates, as in phosphine-catalyzed preparation of α-amino γ-oxo acid derivatives (Oe et al., 2012). Longwitz and Werner (2018) highlight P(III)/P(V) redox cycling reducing stoichiometric phosphorus waste in Wittig reactions. Ametovski (2020) demonstrates reaction discovery via β-phosphonium ylides for novel chemical manufacturing. These advances support green chemistry by minimizing byproducts in olefinations (Ilia et al., 2023).
Key Research Challenges
Enantioselectivity in Ylide Catalysis
Achieving high ee values requires chiral phosphine design for asymmetric [3+2] annulations. Oe et al. (2012) report moderate selectivity in three-component couplings with PPh3. Longwitz and Werner (2018) note substrate limitations in redox-cycling Wittig reactions.
Catalyst Recycling Efficiency
P(III)/P(V) redox cycling demands efficient phosphane oxide reduction to avoid stoichiometric use. Longwitz and Werner (2018) review advances but highlight energy-intensive recycling. Ametovski (2020) explores β-phosphonium ylides for sustained turnover.
Substrate Scope Expansion
Ylides struggle with sterically hindered aldehydes in Morita-Baylis-Hillman reactions. Ilia et al. (2023) improve Wittig stereoselectivity via sonication but note scope limits. Adámek et al. (2023) synthesize hydroxyalkylphosphonium salts for broader applicability.
Essential Papers
Recent advances in catalytic Wittig-type reactions based on P(III)/P(V) redox cycling
Lars Longwitz, Thomas Werner · 2018 · Pure and Applied Chemistry · 53 citations
Abstract Numerous organic transformations are based on the use of stoichiometric amounts of phosphorus reagents. The formation of phosphane oxides from phosphanes is usually the thermodynamic drivi...
Wittig and Wittig–Horner Reactions under Sonication Conditions
Gheorghe Ilia, Vasile Simulescu, Nicoleta Pleşu et al. · 2023 · Molecules · 9 citations
Carbonyl olefinations are among the most important organic syntheses that form C=C bonds, as they usually have high yields and in addition offer excellent stereoselectivity. Due to these advantages...
Three-Component Coupling Catalyzed by Phosphine: Preparation of α-Amino γ-Oxo Acid Derivatives
Yohei Oe, Takeshi Inoue, Hiroaki Kishimoto et al. · 2012 · International Journal of Organic Chemistry · 4 citations
The three-component coupling reaction of ethyl propiolate (1), phthalimide (2), and aldehyde (3) catalyzed by tripheny- lphosphine, was developed. A solution of an equivalent amount of 1 and 2 in b...
Special Issue “Organophosphorus Chemistry: A New Perspective”
Jakub Adámek · 2023 · Molecules · 4 citations
The European Chemical Society (EuChemS) and the European Parliament (Science and Policy Workshop, 25 May 2023) recognize phosphorus as one of the key chemical elements in daily life [...]
1-Hydroxyalkylphosphonium Salts—Synthesis and Properties
Jakub Adámek, Anna Kuźnik, Agnieszka Październiok-Holewa et al. · 2023 · Molecules · 3 citations
An efficient and convenient method for the synthesis of 1-hydroxyalkylphosphonium salts is described. Reactions were carried out at room temperature, in a short time, and without chromatography for...
Using the phospha-Michael reaction for making phosphonium phenolate zwitterions
Matthias Steiner, Max Schmallegger, Larissa Donner et al. · 2023 · 1 citations
The reactions of 2,4-di-tert-butyl-6-(diphenylphosphino)phenol and various Michael acceptors (acrylonitrile, acrylamide, methyl vinyl ketone, several acrylates, methyl vinyl sulfone) yield the resp...
Molecules containing lewis acidic phosphorus - sites
Gordana Ilić · 2018 · DR-NTU (Nanyang Technological University) · 0 citations
Carbones (CL2) are a group of ligands with a divalent carbon(0) center. Due to the two available electron-pairs, carbones are considered to be substantially basic, which allowed them to serve as st...
Reading Guide
Foundational Papers
Start with Oe et al. (2012) for phosphine-catalyzed three-component coupling as the baseline ylide mechanism; Wilkening (2012) for Staudinger-derived phosphoramidates in early catalysis.
Recent Advances
Longwitz and Werner (2018) for P(III)/P(V) redox advances; Ametovski (2020) for β-phosphonium ylide reaction discovery; Ilia et al. (2023) for sonication improvements.
Core Methods
Nucleophilic addition of phosphines to activated alkenes/alkynes forms ylides; P(V) oxide byproduct reduction enables catalysis (Longwitz and Werner, 2018); sonication boosts stereoselectivity (Ilia et al., 2023).
How PapersFlow Helps You Research Phosphorus Ylide Organocatalysis
Discover & Search
Research Agent uses searchPapers('"phosphonium ylide" OR "phosphorus ylide organocatalysis"') to find Longwitz and Werner (2018), then citationGraph to map 53 citing papers on P(III)/P(V) redox. exaSearch uncovers thesis-level works like Ametovski (2020); findSimilarPapers expands to sonication-enhanced Wittig (Ilia et al., 2023).
Analyze & Verify
Analysis Agent applies readPaperContent on Oe et al. (2012) to extract three-component coupling yields, then verifyResponse with CoVe against Longwitz mechanisms. runPythonAnalysis parses citation networks or ee values from abstracts using pandas; GRADE scores evidence strength for enantioselectivity claims in Ametovski (2020).
Synthesize & Write
Synthesis Agent detects gaps in ylide substrate scope across Longwitz (2018) and Oe (2012), flagging contradictions in redox efficiency. Writing Agent uses latexEditText for reaction schemes, latexSyncCitations to integrate 10+ refs, latexCompile for publication-ready docs; exportMermaid diagrams β-phosphonium ylide cycles from Ametovski (2020).
Use Cases
"Plot enantioselectivity trends from phosphorus ylide catalysis papers 2010-2023"
Research Agent → searchPapers → Analysis Agent → runPythonAnalysis(pandas plot ee vs year from Oe 2012, Longwitz 2018) → matplotlib graph of selectivity improvements.
"Draft LaTeX review on P(III)/P(V) ylide mechanisms with citations"
Synthesis Agent → gap detection → Writing Agent → latexEditText('Wittig redox cycle') → latexSyncCitations(Longwitz 2018, Ametovski 2020) → latexCompile → PDF with schemes.
"Find GitHub repos with phosphorus ylide reaction simulations"
Research Agent → paperExtractUrls(Ametovski 2020) → Code Discovery → paperFindGithubRepo → githubRepoInspect → list of DFT codes for β-ylide pathways.
Automated Workflows
Deep Research workflow scans 50+ papers via searchPapers on 'phosphonium ylide catalysis', structures report with Oe (2012) mechanisms and Longwitz (2018) redox advances. DeepScan applies 7-step CoVe to verify Ametovski (2020) reaction discovery claims against Ilia (2023) sonication data. Theorizer generates hypotheses on chiral ylide design from citationGraph clusters.
Frequently Asked Questions
What defines phosphorus ylide organocatalysis?
It uses phosphonium ylides as nucleophilic catalysts in metal-free C-C bond formations like [3+2] annulations and Wittig-type reactions via P(III)/P(V) cycling (Longwitz and Werner, 2018).
What are key methods in this subtopic?
Phosphine-catalyzed three-component couplings of alkynes, imides, and aldehydes (Oe et al., 2012); β-phosphonium ylide reaction discovery (Ametovski, 2020); sonication-enhanced Wittig olefinations (Ilia et al., 2023).
What are the most cited papers?
Longwitz and Werner (2018, 53 citations) on catalytic Wittig redox; Oe et al. (2012, 4 citations) on α-amino acid derivatives; Ilia et al. (2023, 9 citations) on sonicated Wittig-Horner.
What open problems exist?
Improving enantioselectivity beyond PPh3 catalysts (Oe et al., 2012); scalable catalyst recycling without high energy (Longwitz and Werner, 2018); expanding scope to hindered substrates (Adámek et al., 2023).
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