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Merck
CN

257192

Triethylborane

≥95%

Synonym(s):

Triethylboron

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About This Item

Linear Formula:
(C2H5)3B
CAS Number:
97-94-9
Molecular Weight:
97.99
NACRES:
NA.22
PubChem Substance ID:
24855572
UNSPSC Code:
12352001
EC Number:
202-620-9
MDL number:
MFCD00009022
Assay:
≥95%

Key Documents

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InChI key

LALRXNPLTWZJIJ-UHFFFAOYSA-N

InChI

1S/C6H15B/c1-4-7(5-2)6-3/h4-6H2,1-3H3

SMILES string

CCB(CC)CC

assay

≥95%

reaction suitability

reagent type: reductant

refractive index

n20/D 1.397 (lit.)

bp

95 °C (lit.)

mp

−93 °C (lit.)

density

0.677 g/mL at 25 °C (lit.)

Quality Level

100

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Application

Reagent for:
  • Enantioselective umpolung allylation of aldehydes
  • Preparation of tetramethylammonium trialkylphenylborate salts

Catalyst for:
  • Radical reductions of alkyl bromides and iodides bearing electron withdrawing groups with N-heterocyclic carbene boranes
  • Synthesis of 1-substituted pyrrolines by N-diallylation of amines and ring-closing metathesis
  • Decarboxylative C-C bond cleavage reactions
  • Alkene hydrogenations
  • Aminyl radical cyclizations onto silyl enol ethers

Modifier for single-site organochromium ethylene polymerization catalysts
Used with lithium tri-tert-butoxyaluminohydride (cat. no. L2904) in the reductive cleavage of ethers and epoxides. Used in the deoxygenation of primary and secondary alcohols.

General description

Triethylborane (Et3B) is an organoborane pyrophoric liquid. It is prepared on the plant scale by the reaction of AlEt3 and KBF4. Et3B is widely used as a precursor for the preparation of reducing agents such as lithium triethylborohydride and sodium triethylborohydride. It can also be utilized as an initiator in radical cyclization reactions.

Packaging

Supplied in a Sure/Pac™ cylinder and has a 1/4-turn bronze ball valve with a female 1/4" NPT outlet thread (Z122661) installed. Before using the cylinder, ensure that the valve is closed, then remove carbon steel plug that seals the outlet valve.

Compatible with the following:For instructions please refer to technical bulletin AL-136: The Aldrich Sure/Pac™ Cylinder System

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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Danger

Hazard Classifications

Acute Tox. 3 Oral - Eye Dam. 1 - Pyr. Liq. 1 - Skin Corr. 1A

Storage Class

4.2 - Pyrophoric and self-heating hazardous materials

wgk

WGK 1

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

Regulatory Information

监管及禁止进口产品
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Certificates of Analysis (COA)

Lot/Batch Number
SHBS4673
SHBQ6705
SHBL4002
SHBK8092
SHBJ4615

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A Convenient Preparation of Trimethylborane and Triethylborane
Koster, R, et al.
Synth. React. Inorg. Met.-Org. Chem. , 3(4), 359-367 (1973)
Tetrahedron, 49, 7193-7193 (1993)
Masafumi Ueda et al.
Organic letters, 11(20), 4632-4635 (2009-10-09)
Intermolecular hydroxyalkylation of alpha,beta-unsaturated imines involving Et3B-mediated regioselective alkyl radical addition and subsequent hydroxylation with molecular oxygen has been developed, in which N-borylenamine generated by trapping of the enaminyl radical with Et3B was a key intermediate in the proposed aerobic
Aldrichimica Acta, 6, 21-21 (1973)
Triethylborane-mediated atom transfer radical cyclization reaction in water
Yorimitsu H, et al.
The Journal of Organic Chemistry, 63(23), 8604-8605 (1998)
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