Subtopic Deep Dive
Copper-Mediated Sulfonylation
Research Guide
What is Copper-Mediated Sulfonylation?
Copper-mediated sulfonylation refers to copper-catalyzed coupling reactions of sulfonyl chlorides or sulfinates with nucleophiles to construct sulfone motifs in organic synthesis.
This technique enables efficient C-S bond formation for sulfones, key in medicinal chemistry. Copper catalysts facilitate late-stage functionalizations under mild conditions. Over 10 papers since 2011 explore related transition metal catalysis (Eichman and Stambuli, 2011; Johnson et al., 2014).
Why It Matters
Sulfones serve as essential pharmacophores in drug discovery, enabling bioactive compound synthesis. Copper-mediated methods support late-stage diversification of complex molecules (Johnson et al., 2014). These reactions expand synthetic access to aryl sulfides and sulfinates for pharmaceutical applications (Eichman and Stambuli, 2011). Methods like gold-catalyzed sulfination of boronic acids demonstrate versatility in constructing sulfinate derivatives (Johnson et al., 2014).
Key Research Challenges
Catalyst Selectivity
Achieving high selectivity in copper-mediated couplings avoids over-oxidation of sulfinates. Competing pathways reduce sulfone yields (Eichman and Stambuli, 2011). Mechanistic studies are needed for optimization.
Functional Group Tolerance
Late-stage sulfonylation must tolerate sensitive groups in drug-like scaffolds. Copper catalysts can deactivate under diverse conditions (Johnson et al., 2014). Broad substrate scope remains limited.
Mechanistic Understanding
Unclear SET vs. oxidative addition mechanisms hinders catalyst design. Copper-substrate complexes require detailed study (Bizet et al., 2015). Kinetic analyses are sparse.
Essential Papers
Synthetic applications of eosin Y in photoredox catalysis
Durga Prasad Hari, Burkhard König · 2014 · Chemical Communications · 1.0K citations
Eosin Y, a long known dye molecule, has recently been widely applied as a photoredox catalyst in organic synthesis.
Organic synthetic transformations using organic dyes as photoredox catalysts
Shunichi Fukuzumi, Kei Ohkubo · 2014 · Organic & Biomolecular Chemistry · 470 citations
This review article presents various photocatalytic transformation such as oxygenation, halogenation and C–C bond formation with organic photoredox catalysts.
The chemistry of amine radical cations produced by visible light photoredox catalysis
Jie Hu, Jiang Wang, Theresa H. Nguyen et al. · 2013 · Beilstein Journal of Organic Chemistry · 435 citations
Amine radical cations are highly useful reactive intermediates in amine synthesis. They have displayed several modes of reactivity leading to some highly sought-after synthetic intermediates includ...
Organic thermally activated delayed fluorescence (TADF) compounds used in photocatalysis
Megan Bryden, Eli Zysman‐Colman · 2021 · Chemical Society Reviews · 433 citations
Organic compounds that show Thermally Activated Delayed Fluorescence (TADF) have become wildly popular as next generation emitters in organic light-emitting diodes (OLEDs), but since 2016, have rec...
Visible‐Light‐Induced Homolysis of Earth‐Abundant Metal‐Substrate Complexes: A Complementary Activation Strategy in Photoredox Catalysis
Youssef Abderrazak, Aditya Bhattacharyya, Oliver Reiser · 2021 · Angewandte Chemie International Edition · 380 citations
Abstract The mainstream applications of visible‐light photoredox catalysis predominately involve outer‐sphere single‐electron transfer (SET) or energy transfer (EnT) processes of precious metal Ru ...
Sulfur imidations: access to sulfimides and sulfoximines
Vincent Bizet, Christine M. M. Hendriks, Carsten Bolm · 2015 · Chemical Society Reviews · 363 citations
The overview describes sulfur imidation methods providing a practical “tool box” for synthetic chemists and discusses the advantages and disadvantages associated with the use of the various imidati...
A general deoxygenation approach for synthesis of ketones from aromatic carboxylic acids and alkenes
Muliang Zhang, Jin Xie, Chengjian Zhu · 2018 · Nature Communications · 305 citations
Reading Guide
Foundational Papers
Start with Eichman and Stambuli (2011) for transition metal C-S bond overview (285 citations), then Hari et al. (2014) on photoredox applications (1025 citations) to contextualize copper methods.
Recent Advances
Study Johnson et al. (2014) for sulfinate synthesis advances (249 citations) and Bizet et al. (2015) for sulfur imidation extensions (363 citations).
Core Methods
Core techniques: Cu-catalyzed cross-coupling of sulfinates with aryl halides; boronic acid sulfination; photoredox-assisted variants (Eichman 2011; Johnson 2014).
How PapersFlow Helps You Research Copper-Mediated Sulfonylation
Discover & Search
Research Agent uses searchPapers to query 'copper-mediated sulfonylation sulfinates' retrieving Eichman and Stambuli (2011), then citationGraph maps forward citations to recent advances, and findSimilarPapers expands to gold-catalyzed variants like Johnson et al. (2014). exaSearch uncovers niche preprints on copper-sulfone couplings.
Analyze & Verify
Analysis Agent applies readPaperContent to parse Johnson et al. (2014) for gold(I)-heteroatom mechanisms, verifyResponse with CoVe checks mechanistic claims against Eichman and Stambuli (2011), and runPythonAnalysis plots yield distributions from reaction tables using pandas for statistical verification. GRADE scores evidence strength on catalyst efficiency.
Synthesize & Write
Synthesis Agent detects gaps in functional group tolerance across papers, flagging unmet needs in late-stage sulfonylation; Writing Agent uses latexEditText to draft reaction schemes, latexSyncCitations to link Eichman (2011), and latexCompile for publication-ready manuscripts. exportMermaid generates C-S bond formation flowcharts.
Use Cases
"Plot yield vs temperature for copper-catalyzed aryl sulfide syntheses from recent papers"
Research Agent → searchPapers('copper aryl sulfide synthesis') → Analysis Agent → runPythonAnalysis(pandas plot from Eichman 2011 tables) → matplotlib yield scatterplot output.
"Draft LaTeX scheme for copper-mediated sulfone formation from sulfinates"
Synthesis Agent → gap detection on Johnson 2014 → Writing Agent → latexEditText(scheme) → latexSyncCitations(Eichman 2011) → latexCompile → PDF reaction diagram.
"Find GitHub repos implementing copper sulfonylation protocols"
Research Agent → searchPapers('copper sulfonylation') → Code Discovery → paperExtractUrls → paperFindGithubRepo → githubRepoInspect → curated code/protocol list.
Automated Workflows
Deep Research workflow scans 50+ sulfur catalysis papers via searchPapers, structures sulfone synthesis report with citationGraph from Eichman (2011). DeepScan's 7-step chain analyzes Johnson et al. (2014) with CoVe verification and GRADE scoring per mechanism claim. Theorizer generates hypotheses on copper vs. gold catalysis from literature patterns.
Frequently Asked Questions
What defines copper-mediated sulfonylation?
Copper-mediated sulfonylation is the copper-catalyzed coupling of sulfonyl chlorides or sulfinates with nucleophiles to form sulfones (Eichman and Stambuli, 2011).
What methods are used in copper-mediated sulfonylation?
Methods involve Cu-catalyzed C-S bond formation from aryl halides or boronics with sulfur sources, often under mild conditions (Johnson et al., 2014).
What are key papers on this topic?
Eichman and Stambuli (2011, 285 citations) reviews transition metal aryl sulfide synthesis; Johnson et al. (2014, 249 citations) details gold-catalyzed sulfination applicable to copper variants.
What open problems exist?
Challenges include broad functional group tolerance and mechanistic clarity for Cu vs. other metals in late-stage sulfonylation (Bizet et al., 2015).
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Part of the Sulfur-Based Synthesis Techniques Research Guide