{ "id": "ep6xr3aat8", "slug": "palladium-catalysis", "title": "Palladium catalysis", "updated": "2026-10-15", "topic_path": [ { "id": "physical", "label": "Physical world and mathematics", "api_url": "https://www.edgepedia.org/api/v1/topics/physical" }, { "id": "physical.chemistry", "label": "Chemistry", "api_url": "https://www.edgepedia.org/api/v1/topics/physical.chemistry" }, { "id": "physical.chemistry.methods", "label": "Chemical principles and methods", "api_url": "https://www.edgepedia.org/api/v1/topics/physical.chemistry.methods" }, { "id": "physical.chemistry.methods.chemical-synthesis", "label": "Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/topics/physical.chemistry.methods.chemical-synthesis" } ], "geo": [ { "id": "geo.nongeo.t1800.physical.chemistry.methods.chemical-synthesis", "label": "Non-geographic · 1800 to 1945: Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.physical.chemistry.methods.chemical-synthesis", "path": [ { "id": "geo.nongeo", "label": "Non-geographic", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo" }, { "id": "geo.nongeo.t1800", "label": "Non-geographic · 1800 to 1945", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800" }, { "id": "geo.nongeo.t1800.physical", "label": "Physical world and mathematics", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.physical" }, { "id": "geo.nongeo.t1800.physical.chemistry", "label": "Chemistry", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.physical.chemistry" }, { "id": "geo.nongeo.t1800.physical.chemistry.methods", "label": "Chemical principles and methods", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.physical.chemistry.methods" }, { "id": "geo.nongeo.t1800.physical.chemistry.methods.chemical-synthesis", "label": "Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.physical.chemistry.methods.chemical-synthesis" } ] }, { "id": "geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis", "label": "Non-geographic · 1946 to 2000: Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis", "path": [ { "id": "geo.nongeo", "label": "Non-geographic", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo" }, { "id": "geo.nongeo.t1946", "label": "Non-geographic · 1946 to 2000", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946" }, { "id": "geo.nongeo.t1946.physical", "label": "Physical world and mathematics", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical" }, { "id": "geo.nongeo.t1946.physical.chemistry", "label": "Chemistry", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry" }, { "id": "geo.nongeo.t1946.physical.chemistry.methods", "label": "Chemical principles and methods", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry.methods" }, { "id": "geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis", "label": "Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis" } ] } ], "excerpt": "Palladium catalysis is the use of palladium complexes to accelerate organic reactions, most prominently cross-couplings that join two carbon-containing fragments, accounting for roughly a quarter of reactions in the pharmaceutical industry.", "snippet": "Palladium catalysis is the use of palladium complexes to accelerate organic reactions, most prominently cross-couplings that join two carbon-containing fragments, accounting for roughly a quarter of reactions in the pharmaceutical industry.", "node": "physical.chemistry.methods.chemical-synthesis", "markdown": "# Palladium catalysis\n\nPalladium catalysis is the use of palladium complexes to accelerate organic reactions, most prominently cross-couplings that join two carbon-containing fragments, but also alkene arylation, carbon-heteroatom bond formation, and allylic substitution. The metal shutters between palladium oxidation states in a cycle of oxidative addition, transmetalation (transfer of an organic group from one metal to another) or migratory insertion, and reductive elimination. The chemistry is industrially central: palladium-catalyzed cross-couplings account for approximately a quarter of all reactions performed by the pharmaceutical industry,[1](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/) and 82% of drugs contain at least one nitrogen heterocycle, a structural motif accessed by palladium-catalyzed amination.[2](https://pubs.acs.org/chreay/article/125/12/5349/3691325/Metal-N-Heterocyclic-Carbene-Complexes-in-Buchwald)\n\n| Key fact | Detail |\n|---|---|\n| Core cycle | Pd(0)/Pd(II): oxidative addition, transmetalation or migratory insertion, reductive elimination[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880) |\n| Leaving-group reactivity | I > OTf > Br ≫ Cl in oxidative addition[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805) |\n| Typical loading | Skewed to 0–2 mol %; average in-reaction Pd level about 815 ppm across surveyed reactions[5](https://www.sciencedirect.com/org/science/article/pii/S1083616022003632) |\n| Highest reported turnover | TON up to 980,000 in a Pd(OAc)₂/DABCO Stille coupling[5](https://www.sciencedirect.com/org/science/article/pii/S1083616022003632) |\n| Aqueous low-Pd protocol | 50 ppm Pd, TON ~20,000, TOF ~20,000 h⁻¹, Pd removed to <1 ppm with activated charcoal[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805) |\n| Industrial products | Naproxen, montelukast (Singulair), prosulfuron, boscalid, fluxapyroxad, bixafen, linifanib[1](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/) • [6](https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_%28Organic_Chemistry%29/Reactions/Named_Reactions/Suzuki_cross-coupling) |\n| Recognition | The 2010 Nobel Prize in Chemistry honored palladium-catalyzed cross-coupling[1](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/) |\n\n## How it works\n\nThe Suzuki-Miyaura cycle illustrates the general mechanism. First, oxidative addition of an organic halide or other electrophile to a Pd(0) complex gives an R¹-Pd(II)-X species. Second, base-assisted transmetalation transfers the organic group R² from a boronate (R²-BY₂) to palladium. Third, reductive elimination forms the new C-C bond (R¹-R²) and regenerates the Pd(0) catalyst.[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880) [Oxidative addition](https://www.edgepedia.org/oxidative-addition) is often rate-determining, and leaving-group reactivity follows I > OTf > Br ≫ Cl; aryl chlorides often give much lower biaryl yields in Suzuki coupling because their C-Cl bonds add slowly.[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805)\n\nThe [Heck reaction](https://www.edgepedia.org/heck-reaction) runs a different second step: after oxidative addition, the olefin coordinates and undergoes migratory insertion to form the C-C bond, then [beta-hydride elimination](https://www.edgepedia.org/beta-hydride-elimination) releases the substituted olefin and an HPdX species that loses HX to regenerate Pd(0).[7](https://www.nobelprize.org/uploads/2018/06/advanced-chemistryprize2010.pdf)\n\nLigand electronics and sterics govern the cycle. Recent studies favor monocoordinated [LPd⁰] species over dicoordinated [L₂Pd⁰] and Pd(II) complexes, because they need no reduction or ligand dissociation to enter the cycle.[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880) Electron-donating, bulky ligands favor reductive elimination; steric hindrance shortens the lifetime of the transitory LₙR¹Pd(II)R² species, raising the reaction rate and suppressing beta-elimination side reactions.[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880) In aryl chloride aminations, rates are controlled by oxidative addition while yields and scope are controlled by reductive elimination, which must outcompete beta-hydride elimination.[8](https://www.uwindsor.ca/people/jgreen/sites/uwindsor.ca.people.jgreen/files/sl-2006-1283_aryl_amination.pdf)\n\n## How it is done\n\nA bench coupling combines a Pd precursor, a ligand, the two coupling partners, and a base. Common precursors are Pd(OAc)₂, Pd₂(dba)₃, and Pd(PPh₃)₄; ligands are designed to be electron-rich and spatially bulky, which affords high turnover numbers at low loading.[6](https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_%28Organic_Chemistry%29/Reactions/Named_Reactions/Suzuki_cross-coupling) The Suzuki-Miyaura reaction typically couples organoboron compounds (organoborane, boronic acid, boronate ester, or potassium trifluoroborate) with halides or pseudohalides in the presence of a base such as potassium or cesium carbonate.[9](https://iris.unina.it/retrieve/e906ef99-7ebc-44f6-9347-73258d332e24/flow-chemistry-for-flowing-cross-couplings-a-concise-overview.pdf) Proposed base functions include forming [ArPd(OR)L₂], converting the boron reagent into a reactive boronate species, and accelerating reductive elimination through the alkoxide-Pd complex, although the operative role depends on the mechanism and conditions.[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805)\n\n[In situ](https://www.edgepedia.org/in-situ) pre-catalyst reduction is the step practitioners must control. The key step common to all Pd(0)-based methods is generation of the active catalyst in the reaction flask; published protocols identify alcohol-mediated reduction conditions that maximize Pd(II)-to-Pd(0) conversion while preserving ligands and reagents for PPh₃, DPPF, DPPP, Xantphos, SPhos, RuPhos, XPhos, and sSPhos.[10](https://pubs.rsc.org/en/content/articlelanding/2025/qo/d4qo02335h) Kinetic studies show a pre-catalyst induction period that can be shortened by pre-heating the Pd(OAc)₂/ligand mixture; the phosphine itself can act as a sacrificial reductant for Pd(II), while Pd₂(dba)₃ avoids this consumption so long as O₂ is minimized.[11](https://www.nature.com/articles/s41467-024-47939-5) Work-up includes Pd scavenging, discussed below, because residual metal must meet ppm specifications.[12](https://www.sciencedirect.com/org/science/article/pii/S1083616023002451)\n\n## Origin\n\nThe olefin arylation reaction was reported by [Tsutomu Mizoroki](https://www.edgepedia.org/tsutomu-mizoroki), Kunio Mori, and Atsumu Ozaki in 1971 in the Bulletin of the Chemical Society of Japan,[13](https://doi.org/10.1246/bcsj.44.581) and by R. F. Heck and J. P. Nolley in 1972 in [The Journal of Organic Chemistry](https://www.edgepedia.org/the-journal-of-organic-chemistry) for arylation, benzylation, and styrylation of olefins with the corresponding halides.[14](https://doi.org/10.1021/jo00979a024) The Nobel background adds that Fitton's 1968 oxidative additions of aryl halides to Pd(0) supplied the key elementary step, and that A. Yamamoto demonstrated reductive elimination from a diethylnickel complex in 1970.[7](https://www.nobelprize.org/uploads/2018/06/advanced-chemistryprize2010.pdf) Cross-coupling of non-Grignard organometallics followed with the palladium- or nickel-catalyzed reaction of alkenylalanes with alkenyl halides reported by Shigeru Baba and Eiichi Negishi in 1976 in the [Journal of the American Chemical Society](https://www.edgepedia.org/journal-of-the-american-chemical-society).[15](https://doi.org/10.1021/ja00437a067) John K. Stille's 1986 review in Angewandte Chemie consolidated the organotin variant of the reaction.[16](https://doi.org/10.1002/anie.198605081) The 2010 Nobel Prize in Chemistry recognized this field.[1](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/)\n\n## Variants\n\nThe variants differ mainly in the nucleophilic partner and the bond formed.\n\n- **Suzuki-Miyaura**: organoboron compounds plus base, giving biaryls and other C-C-linked products; the base activates boron toward transmetalation.[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880) • [9](https://iris.unina.it/retrieve/e906ef99-7ebc-44f6-9347-73258d332e24/flow-chemistry-for-flowing-cross-couplings-a-concise-overview.pdf)\n- **Heck / Mizoroki-Heck**: aryl halide plus olefin, via migratory insertion and beta-hydride elimination.[7](https://www.nobelprize.org/uploads/2018/06/advanced-chemistryprize2010.pdf) The **Matsuda-Heck** variant uses aryl diazonium salts instead of aryl halides, avoiding ligands but requiring hazardous diazonium handling.[9](https://iris.unina.it/retrieve/e906ef99-7ebc-44f6-9347-73258d332e24/flow-chemistry-for-flowing-cross-couplings-a-concise-overview.pdf)\n- **Negishi**: organozinc partners, which the Nobel background describes as giving superior yields and high functional-group tolerance compared with Grignard or organolithium reagents.[7](https://www.nobelprize.org/uploads/2018/06/advanced-chemistryprize2010.pdf)\n- **Stille**: organotin reagents with organic electrophiles.[16](https://doi.org/10.1002/anie.198605081)\n- **Sonogashira**: sp-sp² coupling of terminal alkynes with aryl halides using a copper co-catalyst at room temperature.[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880)\n- **Buchwald-Hartwig**: C(sp²)-N bond formation. Pd-catalyzed amination using aryl bromides and toxic aminostannanes was reported, followed by improved aminostannane strategies and a tin-free protocol with free amines. Typical loadings are 1-2 mol % with commercially available ligands, and the reaction is not highly oxygen-sensitive.[2](https://pubs.acs.org/chreay/article/125/12/5349/3691325/Metal-N-Heterocyclic-Carbene-Complexes-in-Buchwald) • [9](https://iris.unina.it/retrieve/e906ef99-7ebc-44f6-9347-73258d332e24/flow-chemistry-for-flowing-cross-couplings-a-concise-overview.pdf)\n- **Hiyama**: organosilane coupling with aryl halides, activated by the TASF reagent, described in 1994.[3](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880)\n\n## Applications\n\nIndustrial Heck processes include naproxen (Albermarle, [Hoechst AG](https://www.edgepedia.org/hoechst-ag), 1994), the asthma drug Singulair/montelukast (Merck, 1993), a chip-coating substance for the electronics industry, and the sulfonylurea herbicide prosulfuron, made on a multiton-per-year scale by a Ciba-Geigy process whose key step is a Heck reaction with a diazonium salt.[1](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/) • [7](https://www.nobelprize.org/uploads/2018/06/advanced-chemistryprize2010.pdf) The Suzuki reaction is used in the industrial synthesis, on a scale of thousands of tons, of a crop-protecting antifungal substance,[1](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/) and [linifanib](https://www.edgepedia.org/linifanib), an investigational tyrosine kinase inhibitor, is synthesized on kilogram scale using Suzuki coupling.[6](https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_%28Organic_Chemistry%29/Reactions/Named_Reactions/Suzuki_cross-coupling) A water-only Suzuki protocol prepared the fungicides boscalid (75%), fluxapyroxad (66%), and bixafen (76%) in overall yield.[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805)\n\nContinuous flow improves turnover and product purity. In a SYNFLOW pilot demonstration of Buchwald-Hartwig amination with a Pd-NHC catalyst, the turnover number was 428 in flow versus 58.5 in the batch Pd(OAc)₂/BINAP process; flow mini-plant yields were around 99% with no by-product detected, and Pd in the product was either not detected or below 1 ppm.[17](https://pubs.rsc.org/en/content/articlepdf/2016/re/c5re00048c)\n\nSurveyed literature loadings skew toward 0-2 mol %, with 4-5 mol % common for Stille, Suzuki-Miyaura, and Heck reactions; the average in-reaction Pd level is typically about 815 ppm. The lowest loading recorded for any named reaction was 0.0001 mol % (0.0082 ppm) in a Stille coupling, and a Pd(OAc)₂/DABCO Stille process reached a turnover number of 980,000.[5](https://www.sciencedirect.com/org/science/article/pii/S1083616022003632) Low-Pd aqueous protocols exist: a HandaPhos-Pd(OAc)₂ catalyst enables cross-couplings in water at room temperature using ≤1000 ppm (0.1 mol %) palladium, versus the 1-5 mol % typical of traditional homogeneous conditions, with residual Pd of ≤9 ppm after in-flask extraction and silica filtration.[18](https://pmc.ncbi.nlm.nih.gov/articles/PMC4966530/) A water-only Suzuki protocol runs at 50 ppm Pd with TON and TOF near 20,000, scaled 580-fold to 290.0 mmol, with Pd removed to <1 ppm using activated charcoal and an EtOAc/ethanol work-up.[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805)\n\nScavenging to meet specifications is a developed unit operation. Merck used 0.20 wt MP-TMT to cut Pd from 330 ppm to about 10-30 ppm, demonstrated on 3.2 kg input to give 7 ppm in the final product, and [Boehringer Ingelheim](https://www.edgepedia.org/boehringer-ingelheim) reduced Pd from 1600 to 2.8 ppm with two aqueous N-acetyl-l-cysteine washes on 22.2 kg input.[12](https://www.sciencedirect.com/org/science/article/pii/S1083616023002451) Carbon treatment typically recovers 80-90% of the palladium charged, with the spent carbon incinerated to a Pd-enriched residue for reuse.[19](https://www.frontiersin.org/journals/catalysis/articles/10.3389/fctls.2025.1635370/full)\n\n## Limitations and alternatives\n\nDocumented failure modes include beta-hydride elimination, which competes with reductive elimination and reduces yield with alkyl substrates;[6](https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_%28Organic_Chemistry%29/Reactions/Named_Reactions/Suzuki_cross-coupling) homocoupled biaryl and phenol side products from an Ar-Pd-OH species; and proto-dehalogenation, described in one study as \"a side reaction that is common in Pd-catalyzed reactions in basic DMF reaction media, but not fully understood mechanistically\".[11](https://www.nature.com/articles/s41467-024-47939-5) Low aryl chloride reactivity limits substrate scope,[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805) and Buchwald-Hartwig reactions in flow can suffer from insoluble halide salts that clog devices.[9](https://iris.unina.it/retrieve/e906ef99-7ebc-44f6-9347-73258d332e24/flow-chemistry-for-flowing-cross-couplings-a-concise-overview.pdf) Nickel catalysts are a qualitative alternative where beta-hydride elimination is problematic.[6](https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_%28Organic_Chemistry%29/Reactions/Named_Reactions/Suzuki_cross-coupling)\n\nRecent work extends the platform. A 2024 ligand-controlled, visible-light-driven monometallic Pd cross-electrophile coupling of (hetero)aryl halides and pseudohalides bypasses the transmetalation step by differentiating electrophiles based on bond dissociation enthalpy, and was applied to (hetero)biaryl cores of pharmaceuticals and peptide diversification.[20](https://www.nature.com/articles/s41929-024-01109-4) Photo-excited Pd catalysis overcomes alkyl chloride limits in Mizoroki-Heck coupling at room temperature with blue LED using Pd(PPh₃)₄, across primary, secondary, and tertiary alkyl chlorides.[4](https://www.sciencedirect.com/science/article/pii/S1387700326006805) Aminative Suzuki-Miyaura coupling, reported by Polpum Onnuch, Kranthikumar Ramagonolla, and Richard Y. Liu in Science in 2024, incorporates a formal nitrene insertion that converts C-C-linked biaryl products into C-N-C-linked diaryl amines, joining the Suzuki-Miyaura and Buchwald-Hartwig pathways to the same starting-material classes.[21](https://doi.org/10.1126/science.adl5359)\n\n## References\n\n1. [The Nobel Prize in Chemistry 2010 – Illustrated information](https://www.nobelprize.org/prizes/chemistry/2010/illustrated-information/)\n2. [Metal–N-Heterocyclic Carbene Complexes in Buchwald–Hartwig Amination Reactions (Chemical Reviews, 2025)](https://pubs.acs.org/chreay/article/125/12/5349/3691325/Metal-N-Heterocyclic-Carbene-Complexes-in-Buchwald)\n3. [Mechanistic Aspects of the Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling Reaction](https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101880)\n4. [Recent advances in Pd-catalysed cross-coupling reactions and applications: A review](https://www.sciencedirect.com/science/article/pii/S1387700326006805)\n5. [Pd-Catalyzed Cross-Couplings: On the Importance of the Catalyst Quantity Descriptors, mol % and ppm (Organic Process Research & Development)](https://www.sciencedirect.com/org/science/article/pii/S1083616022003632)\n6. [Suzuki cross coupling (chem.libretexts.org)](https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_%28Organic_Chemistry%29/Reactions/Named_Reactions/Suzuki_cross-coupling)\n7. [Palladium-Catalyzed Cross Couplings in Organic Synthesis (Nobel Prize 2010 scientific background)](https://www.nobelprize.org/uploads/2018/06/advanced-chemistryprize2010.pdf)\n8. [Discovery and Understanding of Transition-Metal-Catalyzed Aromatic Substitution Reactions (Hartwig personal account)](https://www.uwindsor.ca/people/jgreen/sites/uwindsor.ca.people.jgreen/files/sl-2006-1283_aryl_amination.pdf)\n9. [Flow Chemistry for Flowing Cross-Couplings: A Concise Overview (repository copy of OPRD review)](https://iris.unina.it/retrieve/e906ef99-7ebc-44f6-9347-73258d332e24/flow-chemistry-for-flowing-cross-couplings-a-concise-overview.pdf)\n10. [Mastering palladium-catalyzed cross-coupling reactions: the critical role of in situ pre-catalyst reduction design (Org. Chem. Front., 2025)](https://pubs.rsc.org/en/content/articlelanding/2025/qo/d4qo02335h)\n11. [Deciphering complexity in Pd–catalyzed cross-couplings (Nature Communications)](https://www.nature.com/articles/s41467-024-47939-5)\n12. [Palladium Extraction Following Metal-Catalyzed Reactions: Recent Advances and Applications in the Pharmaceutical Industry](https://www.sciencedirect.com/org/science/article/pii/S1083616023002451)\n13. [Tsutomu Mizoroki, Kunio Mori, Atsumu Ozaki (1971). Arylation of Olefin with Aryl Iodide Catalyzed by Palladium. Bulletin of the Chemical Society of Japan.](https://doi.org/10.1246/bcsj.44.581)\n14. [R. F. Heck, J. P. Nolley (1972). Palladium-catalyzed vinylic hydrogen substitution reactions with aryl, benzyl, and styryl halides. The Journal of Organic Chemistry.](https://doi.org/10.1021/jo00979a024)\n15. [Shigeru Baba, Eiichi Negishi (1976). A novel stereospecific alkenyl-alkenyl cross-coupling by a palladium- or nickel-catalyzed reaction of alkenylalanes with alkenyl halides. Journal of the American Chemical Society.](https://doi.org/10.1021/ja00437a067)\n16. [John K. Stille (1986). The Palladium‐Catalyzed Cross‐Coupling Reactions of Organotin Reagents with Organic Electrophiles [New Synthetic Methods (58)]. Angewandte Chemie International Edition in English.](https://doi.org/10.1002/anie.198605081)\n17. [Flow process for direct amination of a pharmaceutically relevant substrate using a Pd-NHC catalyst (Reaction Chemistry & Engineering, 2016)](https://pubs.rsc.org/en/content/articlepdf/2016/re/c5re00048c)\n18. [HandaPhos. A general ligand enabling sustainable ppm levels of palladium-catalyzed cross-couplings in water at room temperature (ACS Catalysis)](https://pmc.ncbi.nlm.nih.gov/articles/PMC4966530/)\n19. [How to develop a sustainable palladium-catalyzed cross-coupling reaction for active ingredient manufacture (Frontiers in Catalysis, 2025)](https://www.frontiersin.org/journals/catalysis/articles/10.3389/fctls.2025.1635370/full)\n20. [Light-induced Pd catalyst enables C(sp2)–C(sp2) cross-electrophile coupling bypassing the demand for transmetalation (Nature Catalysis, 2024)](https://www.nature.com/articles/s41929-024-01109-4)\n21. [Polpum Onnuch, Kranthikumar Ramagonolla, Richard Y. Liu (2024). Aminative Suzuki–Miyaura coupling. Science.](https://doi.org/10.1126/science.adl5359)\n\n---\n*Topic: Encyclopedia › Physical world and mathematics › Chemistry › Chemical principles and methods › Chemical synthesis*\n\n*Initially written Sep 29, 2026 · Edited: Oct 15, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n", "same_as": [], "url": "https://www.edgepedia.org/palladium-catalysis", "markdown_url": "https://www.edgepedia.org/palladium-catalysis.md", "license": { "name": "Edgepedia Community License 1.0", "url": "https://www.edgepedia.org/edgepedia/license", "summary": "Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.", "spdx": "LicenseRef-Edgepedia-Community-1.0" }, "credit": "\"Palladium catalysis\", Edgepedia (EdgeChat), https://www.edgepedia.org/palladium-catalysis. Edgepedia Community License 1.0.", "credit_md": "\"[Palladium catalysis](https://www.edgepedia.org/palladium-catalysis)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/palladium-catalysis](https://www.edgepedia.org/palladium-catalysis). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).", "credit_html": "\"Palladium catalysis\", Edgepedia (EdgeChat), https://www.edgepedia.org/palladium-catalysis. Edgepedia Community License 1.0.", "speakable": "Palladium catalysis is the use of palladium complexes to accelerate organic reactions, most prominently cross-couplings that join two carbon-containing fragments, accounting for roughly a quarter of reactions in the pharmaceutical industry." }