5,5′,6,6′-Tetramethyl-3,3′-di-tert-butyl-1,1′-biphenyl-2,2′-diol
5,5′,6,6′-Tetramethyl-3,3′-di-tert-butyl-1,1′-biphenyl-2,2′-diol (CAS: 101203-31-0) is a specialised organic compound with the molecular formula C24H34O2 and a molecular weight of 354.53 g/mol. This biphenol derivative serves as a key component in advanced chemical synthesis, particularly in catalysis. It is frequently employed as a cocatalyst and a precursor for various ligand and catalyst systems, underpinning its utility in sophisticated organic transformations.
- Synonyms
- 6′,6′-Tetramethyl-3,3′-di-tert-butyl-1,1′-biphenyl-2,2′-diol101203-31-0C24H34O2

Cocatalyst in Intermolecular Hydroamination
This compound functions as a cocatalyst in titanium-catalyzed intermolecular hydroamination reactions, facilitating the addition of an N-H bond across an olefin.
Precursor for Sulfonate Phenol Ligands
It acts as a reactant in the preparation of sulfonate phenol ligands through a sulfonylation process, enabling the synthesis of tailored catalytic agents.
Catalyst Precursor for Olefin Transformations
This material is used in the preparation of catalysts for asymmetric olefin hydroamination and cyclization reactions, as well as single-site catalyst precursors for ring-opening reactions.
Ligand for Asymmetric Catalysis
A biphen-Mo complex derived from this compound has been utilised for the catalysis of enantioselective ring-closing metathesis reactions.
| Molecular weight | 354.53 |
|---|---|
| Empirical formula | C24H34O2 |
| Assay | 97% |
| Application | • Cocatalyst in titanium-catalyzed intermolecular hydroamination1Reactant in preparation of:• Sulfonate phenol ligands via sulfonylation2• Catalysts for asymmetric olefin hydroamination/cyclization reactions3• Single site catalyst precursors for catalysis of ring-opening reactions4• Biphen-Mo complex used for catalysis of enantioselective ring-closing metathesis5 |
| Melting point | 164-169 °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 5,5′,6,6′-Tetramethyl-3,3′-di-tert-butyl-1,1′-biphenyl-2,2′-diol used for?
+
This compound is used as a cocatalyst in titanium-catalyzed intermolecular hydroamination and as a reactant in the preparation of various ligands and catalyst systems for asymmetric organic synthesis, including those used in olefin hydroamination, cyclization, and ring-closing metathesis reactions.
What is the CAS number and molecular formula?
+
The CAS number is 101203-31-0 and the empirical formula (Hill notation) is C24H34O2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies this product at an assay of 97%. This is typically considered a research or technical grade; it is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety and handling recommendations?
+
When handling, it is essential to use eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used. The substance has a WGK classification of 3 in Germany, indicating a high hazard to water.
How is this chemical packed and shipped?
+
This chemical is available for export globally. Packaging details are confirmed upon order, adhering to international shipping regulations for chemical substances.
How can I request a sample or quote?
+
To request a sample or a quotation, please contact our sales team through the TSS website or via email, providing your details and the product CAS number 101203-31-0.
▶ Related products

Benzeneruthenium(II) chloride dimer
Ru2(C6H6)2Cl4
Catalysis & Inorganic
Benzoylferrocene
C17H14FeO
Catalysis & Inorganic
Benzyldiphenylphosphine
C6H5CH2P(C6H5)2
Catalysis & Inorganic
Beryllium
Be
Catalysis & Inorganic
Beryllium oxide
BeO
Catalysis & Inorganic![Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer — chemical structure, CAS 12257-42-0; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F12257-42-0.png&w=3840&q=75)
Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer
Catalysis & Inorganic
![Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo — chemical structure, CAS 1228149-03-8; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1228149-03-8.png&w=3840&q=75)
Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo
1-d:1′
Catalysis & Inorganic![Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride (C16H20ClN3Ni) — chemical structure, CAS 1033772-47-2; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1033772-47-2.png&w=3840&q=75)
Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride
C16H20ClN3Ni
Catalysis & Inorganic▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis