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659878

Sigma-Aldrich

Potassium tert-butoxide

sublimed grade, 99.99% trace metals basis

Sinónimos:

Potassium T-butoxide

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About This Item

Fórmula lineal:
(CH3)3COK
Número de CAS:
865-47-4
Peso molecular:
112.21
Beilstein/REAXYS Number:
3556712
EC Number:
212-740-3
MDL number:
MFCD00012162
UNSPSC Code:
12352103
PubChem Substance ID:
24884165
NACRES:
NA.23

grade

sublimed grade

Quality Level

100

vapor pressure

1 mmHg ( 220 °C)

assay

99.99% trace metals basis

form

solid

reaction suitability

core: potassium

mp

256-258 °C (dec.) (lit.)

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 is a strong alkoxide base, it can deprotonate carbon and other Brφnsted acids. It is a relatively poor nucleophile.
Total impurities: may contain up to 5,000 ppm Sodium

Application

Mizoroki-Heck-Type reactions are mediated by potassium tert-butoxide. potassium tert-butoxide can commence the anionic polymerization of carbazolyl-substituted oxiranes.

pictograms

FlameCorrosion
GHS02,GHS05

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Flam. Sol. 1 - Self-heat. 2 - Skin Corr. 1A

supp_hazards

EUH014

Storage Class

4.2 - Pyrophoric and self-heating hazardous materials

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificados de análisis (COA)

Lot/Batch Number
0000298413
0000298412
0000263238
0000263239
0000213172

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Anionic polymerization of carbazolyl-substituted oxiranes initiated by potassium alkalide, potassium tert-butoxide and potassium hydride.
Buika G, et al.
Macromolecular Chemistry and Physics, 196(4), 1287-1293 (1995)
Einav Amit et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(57), 13046-13052 (2020-04-29)
N-heterocyclic carbenes (NHCs) have emerged as a unique molecular platform for the formation of self-assembled monolayers (SAMs) on various surfaces. However, active carbene formation requires deprotonation of imidazolium salt precursors, which is mostly facilitated by exposure of the salt to
Eiji Tayama et al.
Organic & biomolecular chemistry, 6(20), 3673-3680 (2008-10-10)
The Stevens rearrangement of N-allylic alpha-aryl amino acid-derived ammonium salts and the Sommelet-Hauser rearrangement of N-benzylic alpha-alkyl amino acid-derived ammonium salts are shown to proceed with remarkably high levels of diastereoselectivity. The methods presented in this work provide new routes
Wen-Sen He et al.
Bioresource technology, 114, 1-5 (2012-04-03)
The effects of solvents with different log P values, and of lipases on the synthesis of water-soluble plant stanol derivatives were investigated. Results showed that conversion in solvents with log P<0.37 was mainly controlled by the hydrophobicity of the solvent
Yong Guo et al.
Organic & biomolecular chemistry, 7(8), 1716-1722 (2009-04-04)
Alpha-fluoro-alpha-aryl-ketones were synthesized by the Pd-catalyzed cross-coupling of aryl bromides with either alpha-fluoroketones or their corresponding silyl enol ethers. The direct arylation with an alpha-fluoroketone requires a strong base, such as potassium tert-butoxide, and under these conditions the presence of
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