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Sigma-Aldrich

Bis(pinacolato)diboron

99%

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Synonym(s):
4,4,4′,4′,5,5,5′,5′-Octamethyl-2,2′-bi-1,3,2-dioxaborolane
Empirical Formula (Hill Notation):
C12H24B2O4
CAS Number:
Molecular Weight:
253.94
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Assay

99%

form

powder (or crystals)

mp

137-140 °C (lit.)

SMILES string

CC1(C)OB(OC1(C)C)B2OC(C)(C)C(C)(C)O2

InChI

1S/C12H24B2O4/c1-9(2)10(3,4)16-13(15-9)14-17-11(5,6)12(7,8)18-14/h1-8H3

InChI key

IPWKHHSGDUIRAH-UHFFFAOYSA-N

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This Item
794287518808473286
form

powder (or crystals)

form

solid

form

-

form

-

mp

137-140 °C (lit.)

mp

48 °C

mp

180.5-184.5 °C (lit.)

mp

189-196 °C (lit.)

General description

Bis(pinacolato)diboron or (B2pin2) is the most commonly used diborane reagent in organic synthesis due to its high stability in air and moisture. It can be synthesized by treating tetrakis(dimethylamino)diboron with pinacol in acidic conditions.

Application

Reagent used for the cis-vicinal diborylation of acetylenes and olefins with Pt catalysis; borylation of aromatics by Pd catalysis.
Substrate used in a new palladium-catalyzed cyclization of 1,6-enynes leading to homoallylic alkylboronates.
Used to construct a tetramethylpyrrolidine nitroxide scaffold for the synthesis of paramagnetic heterocycles by Suzuki coupling.

related product

Product No.
Description
Pricing

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Takahiro Muraoka et al.
Nature communications, 11(1), 2924-2924 (2020-06-12)
Biological membranes play pivotal roles in the cellular activities. Transmembrane proteins are the central molecules that conduct membrane-mediated biochemical functions such as signal transduction and substance transportation. Not only the molecular functions but also the supramolecular properties of the transmembrane
Pd-catalyzed borylative cyclization of 1,6-enynes.
Juan Marco-Martínez et al.
Journal of the American Chemical Society, 129(7), 1874-1875 (2007-01-31)
Synthesis, 2573-2573 (2006)
Synlett, 15, 2442-2443 (2003)
Synthesis of benzylic boronates via palladium-catalyzed cross-coupling reaction of bis (pinacolato) diboron with benzylic halides.
Giroux A.
Tetrahedron Letters, 44(2), 233-235 (2003)

Articles

Arylboronic acids and esters are invaluable tools for the chemical community. These powerful reagents are used for a variety of transformations, most notably the Suzuki-Miyaura cross-coupling reaction.

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