9,9-Dimethyl-4,5-bis(di-tert-butylphosphino)xanthene
9,9-Dimethyl-4,5-bis(di-tert-butylphosphino)xanthene (CAS 856405-77-1) is a high-purity organophosphorus compound with a molecular weight of 498.66. This xanthene-based phosphine ligand is widely employed in homogeneous catalysis, particularly in cross-coupling reactions. Its unique structure offers excellent steric and electronic properties, facilitating challenging synthetic transformations in organic chemistry and materials science.
- IUPAC
- t-Bu-Xantphos
- Synonyms
- 856405-77-1, (C15H12O)(P(C4H9)2)2, t-Bu-Xantphos
Palladium-Catalysed Cross-Coupling Reactions
This phosphine ligand is highly effective in palladium-catalysed reactions such as Suzuki-Miyaura, Buchwald-Hartwig amination, and Sonogashira couplings. It promotes high yields and turnover numbers for a variety of substrates.
Homogeneous Catalysis
Utilised as a ligand in transition metal catalysis, it stabilises catalytic species and influences reaction selectivity and activity. It is particularly useful for reactions involving sterically hindered or electronically deactivated substrates.
Organic Synthesis
Enables the efficient synthesis of complex organic molecules, including pharmaceuticals, agrochemicals, and advanced materials, by facilitating key bond-forming steps.
| Molecular weight | 498.66 |
|---|---|
| Linear formula | (C15H12O)(P(C4H9)2)2 |
| Assay | 97% |
| Melting point | 153-157 °C |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 9,9-Dimethyl-4,5-bis(di-tert-butylphosphino)xanthene used for?
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It is primarily used as a ligand in homogeneous catalysis, particularly for palladium-catalysed cross-coupling reactions in organic synthesis.
What are the CAS number and formula for this compound?
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The CAS number is 856405-77-1. The linear formula is (C15H12O)(P(C4H9)2)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
What are the safety and handling recommendations for this chemical?
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Appropriate personal protective equipment, including eyeshields and gloves, should be worn. A type N95 (US) or type P1 (EN143) respirator filter is recommended. It is classified with WGK Germany 3.
How is this chemical packed and shipped by TSS?
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Tech Serve Solutions exports and supplies this chemical globally, adhering to all necessary regulations for safe and secure transportation.
How can I request a quote or sample?
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Please contact our sales team via the website or phone to request a quotation or a sample of 9,9-Dimethyl-4,5-bis(di-tert-butylphosphino)xanthene.
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