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Sigma-Aldrich

Methylboronic acid

97%

Synonym(s):

Methaneboronic acid

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About This Item

Linear Formula:
CH3B(OH)2
CAS Number:
Molecular Weight:
59.86
Beilstein:
1731087
MDL number:
UNSPSC Code:
12352103
PubChem Substance ID:
NACRES:
NA.22

Assay

97%

form

solid

mp

91-94 °C (lit.)

SMILES string

CB(O)O

InChI

1S/CH5BO2/c1-2(3)4/h3-4H,1H3

InChI key

KTMKRRPZPWUYKK-UHFFFAOYSA-N

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Application

Methylboronic acid can be used as a reagent:
  • In the palladium-catalyzed Stille and Suzuki-Miyaura cross-couplings.
  • In the microwave-heated heterogeneous palladium (Pd)-catalytized reactions.
  • In ruthenium (Ru)-catalyzed silylation reactions
  • To prepare bis(aminotropone) titanium (Ti) catalysts for ethylene polymerizations.
  • In the enantioselective asymmetric bromoaminocyclization and bromoaminocyclization using amino-thiocarbamate catalysts.
  • To prepare common building blocks for pharmaceuticals and agrochemicals.
  • To prepare chrysin analogs by Suzuki-Miyaura coupling reactions.
  • To prepare casein kinase I inhibitors.
  • In the divergent C-H functionalizations directed by sulfonamide pharmacophores in drug discovery.
  • In the synthesis of unsymmetrical monosulfides from disulfides via copper-catalyzed coupling with boronic acids.
  • In a palladium-catalyzed coupling with enol tosylates.
  • For derivatizing many carbohydrates and biologically active compounds for GLC analysis.

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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Hui-Xiong Dai et al.
Journal of the American Chemical Society, 133(18), 7222-7228 (2011-04-15)
Modern drug discovery is contingent on identifying lead compounds and rapidly synthesizing analogues. The use of a common pharmacophore to direct multiple and divergent C-H functionalizations of lead compounds is a particularly attractive approach. Herein, we demonstrate the viability of
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Organic Process Research & Development, 15, 1040-1045 (2011)
Ruthenium-catalyzed C-H silylation of methylboronic acid using a removable a-directing modifier on the boron atom
Ihara, H.; Ueda, A.; Suginome, M.
Chemistry Letters (Jpn), 40, 916-918 (2011)
Ling Zhou et al.
Journal of the American Chemical Society, 133(24), 9164-9167 (2011-05-05)
A facile and efficient enantioselective bromoaminocyclization of unsaturated sulfonamides has been developed using an amino-thiocarbamate catalyst. A range of enantioenriched pyrrolidines were prepared with up to 99% yield and 99% ee. The corresponding lactams could be obtained through oxidation of

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