Allenylboronic acid pinacol ester
Allenylboronic acid pinacol ester (CAS 865350-17-0), with the molecular formula C9H15BO2 and a molecular weight of 166.03 g/mol, is a valuable organoboron compound. This versatile reagent is primarily employed as a building block in organic synthesis. Its structure, featuring an allenyl group and a pinacol boronate ester, facilitates participation in various cross-coupling reactions, enabling the construction of complex organic molecules. It is supplied by TSS with an assay of 97%.
- IUPAC
- 2-Allenyl-4,4,5,5-tetramethyl(1,3,2)-dioxaborolane,4,4,5,5-Tetramethyl-2-(1,2-propadienyl)-1,3,2-dioxaborolane
- Synonyms
- 2-Allenyl-4,4,5,5-tetramethyl(1,3,2)-dioxaborolane4,4,5,5-Tetramethyl-2-(1,2-propadienyl)-1,3,2-dioxaborolane

Organic Synthesis Intermediate
Allenylboronic acid pinacol ester serves as a key intermediate in the synthesis of diverse organic compounds. It is particularly useful in reactions requiring the introduction of an allenyl moiety.
Cross-Coupling Reactions
This boronate ester is an effective coupling partner in metal-catalyzed cross-coupling reactions, such as Suzuki-Miyaura coupling, enabling the formation of carbon-carbon bonds.
Heterocyclic Chemistry
It can be utilised in the synthesis of complex heterocyclic structures, where its unique reactivity contributes to efficient ring formation or functionalisation.
Materials Science
The compound's structure lends itself to applications in materials science, potentially in the development of new polymers or functional materials through controlled synthesis.
| Molecular weight | 166.03 |
|---|---|
| Empirical formula | C9H15BO2 |
| Assay | 97% |
| Density | 0.9237 g/mL at 25 °C |
| Refractive index | n20/D 1.459 |
| Storage temperature | 2-8°C |
| Protective equipment | Eyeshields, Gloves, half-mask respirator (EU), half-mask respirator (US), multi-purpose combination respirator cartridge (US) |
|---|---|
| Flash point | 65 °C / 149 °F |
| Transport (UN / ADR) | NA 1993 / PGIII |
| 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 Allenylboronic acid pinacol ester used for?
+
Allenylboronic acid pinacol ester is primarily used as a building block and intermediate in organic synthesis, particularly in cross-coupling reactions for constructing carbon-carbon bonds and synthesising complex organic molecules and heterocycles.
What are the CAS number and formula for Allenylboronic acid pinacol ester?
+
The CAS number for Allenylboronic acid pinacol ester is 865350-17-0, and its molecular formula is C9H15BO2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Allenylboronic acid pinacol ester with an assay of 97%. This is a research/technical grade material, and TSS does not represent it as USP, BP, or EP grade.
What are the safety and handling precautions for Allenylboronic acid pinacol ester?
+
Allenylboronic acid pinacol ester is a combustible liquid with a flash point of 65 °C (149 °F). It requires handling with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator. Store at 2-8°C.
How is Allenylboronic acid pinacol ester packed, shipped, and exported?
+
Allenylboronic acid pinacol ester is carefully packed according to international shipping regulations for hazardous materials (NA 1993, PGIII) and is exported globally by Tech Serve Solutions.
How can I request a sample or quote for Allenylboronic acid pinacol ester?
+
To request a sample or quote for Allenylboronic acid pinacol ester, please contact the Tech Serve Solutions sales team through our website or direct contact details.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ 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