(9-Benzyl-9-fluorenyl)dicyclohexylphosphonium tetrafluoroborate
(9-Benzyl-9-fluorenyl)dicyclohexylphosphonium tetrafluoroborate (CAS: 937378-18-2), with the molecular formula C32H38BF4P and a molecular weight of 540.42, is a specialised phosphine compound. It serves as a key catalyst in various cross-coupling reactions, including Sonogashira, Suzuki, and Buchwald-Hartwig couplings. This reagent is valuable for synthesising complex organic molecules and is favoured in academic and industrial research for its catalytic efficacy.
- IUPAC
- (9-Benzyl-9-fluorenyl)dicyclohexylphosphine tetrafluoroborate,Dicyclohexyl[9-(phenylmethyl)-9H-fluoren-9-yl]phosphine tetrafluoroborate,cataCXium® FBn
- Synonyms
- Dicyclohexyl[9-(phenylmethyl)-9H-fluoren-9-yl]phosphine tetrafluoroboratecataCXium® FBn

Sonogashira Coupling
This phosphonium salt acts as an effective catalyst in Sonogashira coupling reactions, facilitating the formation of carbon-carbon bonds between terminal alkynes and aryl or vinyl halides. Its structure promotes efficient catalytic cycles under mild conditions.
Suzuki Coupling
It is employed as a ligand precursor in Suzuki-Miyaura coupling reactions, enabling the synthesis of biaryl compounds. The unique phosphine structure contributes to high yields and selectivity in these palladium-catalysed transformations.
Buchwald-Hartwig Amination
This compound can be utilised in catalytic systems for Buchwald-Hartwig amination, a crucial method for forming carbon-nitrogen bonds. It supports the efficient coupling of amines with aryl or vinyl halides.
Asymmetric Synthesis
As a chiral ligand precursor, it finds application in asymmetric synthesis, guiding the stereochemical outcome of reactions. This is vital for producing enantiomerically pure compounds.
| Molecular weight | 540.42 |
|---|---|
| Empirical formula | C32H38BF4P |
| Assay | 95% |
| Application | Catalyst for Sonogashira, Suzuki, and Buchwald-Hartwig coupling reactions1 |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (9-Benzyl-9-fluorenyl)dicyclohexylphosphonium tetrafluoroborate used for?
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It is primarily used as a catalyst in Sonogashira, Suzuki, and Buchwald-Hartwig coupling reactions, as well as in asymmetric synthesis.
What is the CAS number and formula for this compound?
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The CAS number is 937378-18-2 and the molecular formula is C32H38BF4P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product at a minimum assay of 95%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety and handling recommendations?
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This compound is classified as a Warning. It may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). When handling, wear a dust mask (type N95 or equivalent), eye shields, and gloves. Ensure adequate ventilation and avoid breathing dust. In case of contact with eyes, rinse cautiously with water for several minutes (P305+P351+P338).
How is this chemical packed and shipped?
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Tech Serve Solutions ensures careful packing suitable for international export, adhering to all relevant shipping regulations. Specific packaging details can be provided upon request.
How can I request a sample or quote?
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To request a sample or a quotation for (9-Benzyl-9-fluorenyl)dicyclohexylphosphonium tetrafluoroborate, please contact our sales team through the website or by calling us directly.
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