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328650

Sigma-Aldrich

Potassium tert-butoxide solution

1.0 M in THF

Synonym(s):

Potassium tert-butylate, Potassium-2-methylpropan-2-olate solution

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About This Item

Linear Formula:
(CH3)3COK
CAS Number:
865-47-4
Molecular Weight:
112.21
Beilstein:
3556712
MDL number:
MFCD00012162
UNSPSC Code:
12352103
PubChem Substance ID:
24859391
NACRES:
NA.23

form

liquid

Quality Level

200

reaction suitability

core: potassium

concentration

1.0 M in THF

density

0.902 g/mL at 25 °C

SMILES string

[K+].CC(C)(C)[O-]

InChI

1S/C4H9O.K/c1-4(2,3)5;/h1-3H3;/q-1;+1

InChI key

LPNYRYFBWFDTMA-UHFFFAOYSA-N

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General description

Potassium tert-butoxide solution is a strong non nucleophilic base. It is capable of deprotonating carbon and other Bronsted acids. Reagent solutions in tert-BuOh may be prepared by reacting anhydrous alcohol with potassium in nitrogen atmosphere.

Application

Potassium tert-butoxide solution(t-BuOK) can be used:
  • As a catalyst for the interesterification of rapeseed oil with methyl acetate.
  • To promote Sommelet–Hauser rearrangements of N-benzylic amino acid-derived ammonium ylides under mild conditions.
  • As a metal-organic precursor in the synthesis of KNbO3 ferroelectric films by the chemical vapor deposition method.
  • To prepare 3-potassiooxamethylpyridine catalyst.
  • As a strong alkoxide base reagent.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1A - STOT SE 3

Target Organs

Central nervous system, Respiratory system

Supplementary Hazards

EUH014,EUH019

Storage Class Code

4.3 - Hazardous materials which set free flammable gases upon contact with water

WGK

WGK 1

Flash Point(F)

-2.2 °F - closed cup

Flash Point(C)

-19 °C - closed cup

Certificates of Analysis (COA)

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One-step methodology for the synthesis of FA picolinyl esters from intact lipids.
Destaillats F and Angers P
Journal of the American Oil Chemists' Society, 79(3), 253-256 (2002)
Wei Liu et al.
Chemical communications (Cambridge, England), 49(29), 2983-2985 (2013-03-07)
Simple and cheap alcohols can promote the direct arylation of unactivated arenes with aryl iodides and bromides in the presence of potassium tert-butoxide. This transition-metal-free aromatic C-H transformation offers a cheap and easy practical way to synthesize biaryls under mild
E Crespo-Corral et al.
Journal of chromatography. A, 1209(1-2), 22-28 (2008-10-01)
The usefulness of the potassium tert-butoxide/dimethyl sulphoxide/ethyl iodide reaction with carbamate and phenylurea herbicides, and its application to phenoxy acids as a way to prevent hazards and toxicity of the sodium hydride/dimethyl sulphoxide/methyl iodide reaction was studied. Using factorial design
Subhadip De et al.
Organic letters, 14(17), 4466-4469 (2012-08-16)
A transition-metal-free intramolecular dehydrohalide coupling via intramolecular homolytic aromatic substitution (HAS) with aryl radicals has been developed in the presence of potassium tert-butoxide and an organic molecule as the catalyst. The methodology has been applied to a concise synthesis of
Scott E Denmark et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 12(19), 4954-4963 (2006-05-04)
This paper chronicles the conceptual development, proof of principle experiments, and recent advances in the palladium-catalyzed cross-coupling reactions of the conjugate bases of organosilanols. The discovery that led to the design and refinement of this process represents a classical illustration
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