PMC2007
SPhos
≥98%, ISOM8™
Synonyme(s) :
SPhos, 2-Dicyclohexylphosphino-2′,6′-dimethoxybiphenyl, S Phos, 2-Dicyclohexylphosphino-2′,6′-dimethoxybiphenyl, S Phos
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A propos de cet article
Quality Segment
product line
ISOM8™
assay
(HPLC), ≥98%
form
solid
mol wt
410.53
reaction suitability
reaction type: Buchwald-Hartwig Cross Coupling Reaction, reaction type: Cross Couplings, reaction type: Heck Reaction, reaction type: Hiyama Coupling, reaction type: Negishi Coupling, reaction type: Sonogashira Coupling, reaction type: Stille Coupling, reaction type: Suzuki-Miyaura Coupling, reagent type: catalyst, reagent type: ligand
greener alternative product score
old score: 10
new score: 1
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greener alternative product characteristics
Waste Prevention
Less Hazardous Chemical Syntheses
Inherently Safer Chemistry for Accident Prevention
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sustainability
Greener Alternative Product
mp
164-166 °C °C (Lit.), 164-166 °C (lit.)
application(s)
diagnostic assay manufacturing
functional group
phosphine
greener alternative category
storage temp.
15-25°C
SMILES string
COc1cccc(OC)c1-c2ccccc2P(C3CCCCC3)C4CCCCC4
InChI
1S/C26H35O2P/c1-27-23-17-11-18-24(28-2)26(23)22-16-9-10-19-25(22)29(20-12-5-3-6-13-20)21-14-7-4-8-15-21/h9-11,16-21H,3-8,12-15H2,1-2H3
InChI key
VNFWTIYUKDMAOP-UHFFFAOYSA-N
General description
We are committed to bringing you Greener Alternative Products, which adhere to one of the four categories of Greener Alternatives . This product belongs to category of Re-engineered products, showing key improvements in Green Chemistry Principles “Waste Prevention”, “Atom Economy” and “Design for Energy Efficiency”. Click here to view its DOZN scorecard.
Application
- Electron-Rich Design: The methoxy groups at the 2′ and 6′ positions of the biphenyl backbone render SPhos strongly electron-rich, elevating electron density at the palladium center and facilitating oxidative addition - often the rate-determining step in cross-coupling catalysis
- Sterically Bulky: The dicyclohexylphosphine moiety and ortho-substituents on the biphenyl framework provide substantial steric shielding around the metal center, suppressing undesirable side reactions
- Air Stability & High Thermal Stability: SPhos is air-stable as a solid, simplifying storage and handling without the need for inert atmosphere techniques and SPhos-based catalysts withstand elevated reaction temperatures.
- Suzuki-Miyaura Cross-Coupling: Flagship application of SPhos; effective for unactivated aryl chlorides, sterically hindered biaryls, heteroaryl systems, and macrocyclic natural product synthesis, often under mild or room-temperature conditions.
- Buchwald-Hartwig Amination: Highly active for C–N bond formation, including coupling of aryl chlorides with primary amines. Other Cross-Coupling Reactions: Applied in Heck, Negishi, Hiyama, Stille, Sonogashira, and borylation reactions of aryl halides.
- Pharmaceutical and Natural Product Synthesis: SPhos enables the synthesis of bioactive molecules such as biaryl amino acids found in the chloropeptin family of antibiotics, owing to its capacity to facilitate complex bond formations while suppressing side reactions including racemization.
- Industrial Applications: The air stability and operational simplicity of SPhos-based catalysts render them suitable for large-scale production of fine chemicals and advanced material.
Recent Studies and Innovations:
- Aqueous-Phase Borylation with Stable Precatalysts: SPhos plays a critical role in enhancing the efficiency and yield of palladium-catalyzed [Pd(OAc)2] borylation reactions conducted under aqueous conditions. Its ability to stabilize active palladium species and facilitate reactions with diverse substrates makes it invaluable in the synthesis of active pharmaceutical ingredients (Compagno et al., 2024).
- Ligand medication reaction: Replacing the -PCy2 group in SPhos with diphenylphosphine (-PPh2) in combination with Pd(OAc)2 affords a catalyst system that surpasses conventional SPhos in the arylation of polyfluoroarenes under mild reaction conditions (Yuen et al., 2018).
- Suzuki-Miyaura & Heck reactions: SPhos-based systems in combination with palladium(II) salts such as Pd(OAc)2 provide effective precatalysts for Suzuki-Miyaura and Heck reactions. Optimization of the pre-catalyst reduction process to generate active Pd(0) species is key to achieving optimal performance (Fantoni et al., 2025).
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Classe de stockage
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
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