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754242

Sigma-Aldrich

Tetrahydroxydiboron

95%

Synonym(s):

BBA, Bis-Boric acid, Diboronic acid

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About This Item

Empirical Formula (Hill Notation):
B2H4O4
CAS Number:
13675-18-8
Molecular Weight:
89.65
MDL number:
MFCD05663888
UNSPSC Code:
12352103
PubChem Substance ID:
329766409
NACRES:
NA.22

Quality Level

200

Assay

95%

form

solid

mp

>385 °C

SMILES string

OB(O)B(O)O

InChI

1S/B2H4O4/c3-1(4)2(5)6/h3-6H

InChI key

SKOWZLGOFVSKLB-UHFFFAOYSA-N

Related Categories

Application

Tetrahydroxydiboron (BBA) is an efficient borylating agent that can be used to borylate a wide variety of aryl and heteroaryl substrates with low Pd- and Ni-catalyst loads.

Other reactions employing BBA as a reagent:
  • Palladium-catalyzed boronation of vinyl cyclopropane, vinyl aziridine, and allyl acetate substrates.
  • To facilitate catalytic transfer hydrogenations of simple alkenes and alkynes.
  • Selective reducing agent for in situ N-oxide reduction of pyridine-N-oxides.
  • As a substitute to bis(pinacolato) diboron for Miyaura borylation.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Rapid and Selective in situ Reduction of Pyridine-N-oxides with Tetrahydroxydiboron.
Londregan A T
Synlett, 24(20), 2695-2700 (2013)
Nickel-catalyzed borylation of halides and pseudohalides with tetrahydroxydiboron [B2 (OH) 4].
Molander G A, et al.
The Journal of Organic Chemistry, 78(13), 6427-6439 (2013)
Palladium-catalyzed, direct boronic acid synthesis from aryl chlorides: a simplified route to diverse boronate ester derivatives.
Molander G A, et al.
Journal of the American Chemical Society, 132(50), 17701-17703 (2010)
Palladium pincer complex catalyzed substitution of vinyl cyclopropanes, vinyl aziridines, and allyl acetates with tetrahydroxydiboron. An efficient route to functionalized allylboronic acids and potassium trifluoro (allyl) borates.
Sebelius S et al.
Journal of the American Chemical Society, 127(30), 10478-10479 (2005)
Scope of the Two-Step, One-Pot Palladium-Catalyzed Borylation/ Suzuki Cross-Coupling Reaction Utilizing Bis-Boronic Acid.
Molander GA, et al.
The Journal of Organic Chemistry, 77, 8678-8688 (2012)
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