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796549

Sigma-Aldrich

Stahl Aerobic Oxidation TEMPO solution

0.2 M in acetonitrile, Solution for Oxidation of Primary Alcohols

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About This Item

UNSPSC Code:
12352000
PubChem Substance ID:
329768535
NACRES:
NA.22

form

liquid

reaction suitability

reagent type: oxidant

concentration

0.2 M in acetonitrile

storage temp.

2-8°C

SMILES string

CN1C=CN=C1.CC2(C)CCCC(C)(C)N2[O].C3(C4=NC=CC=C4)=NC=CC=C3

InChI

1S/C10H8N2.C9H18NO.C4H6N2/c1-3-7-11-9(5-1)10-6-2-4-8-12-10;1-8(2)6-5-7-9(3,4)10(8)11;1-6-3-2-5-4-6/h1-8H;5-7H2,1-4H3;2-4H,1H3

InChI key

BQFURWVGIDXRNB-UHFFFAOYSA-N

General description

Stahl Aerobic Oxidation TEMPO solution contains 1-methylimidazole (NMI), 2,2′-bipyridyl (bpy), and TEMPO. It is widely employed for the oxidation of alcohols.

Application

This convenience solution can be used in tandem with tetrakisacetonitrile copper(I) triflate (685038) for the oxidation of primary alcohols through aerobic conditions developed by the Stahl Research Group.

Other Notes

Technology Spotlight:
Aerobic Alcohol Oxidation Solutions

Stable TEMPO and ABNO Catalyst Solutions for User-Friendly (bpy)Cu/Nitroxyl- Catalyzed Aerobic Alcohol Oxidation

Practical Aerobic Alcohol Oxidation with Cu/Nitroxyl and Nitroxyl/NOx Catalyst Systems

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 2 - Repr. 2 - Skin Corr. 1C

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

35.6 °F

Flash Point(C)

2.0 °C

Certificates of Analysis (COA)

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Practical Aerobic Alcohol Oxidation with Cu/Nitroxyl and Nitroxyl/NOx Catalyst Systems.
Miles KC and Stahl SS.
Aldrichimica Acta, 48(1) (2015)
Continuous-Flow Aerobic Oxidation of Primary Alcohols with a Copper(I)/TEMPO Catalyst
Greene, JF, et al.
Organic Process Research & Development, 17 (10), 1247?1251-1247?1251 (2013)
Jessica M Hoover et al.
Journal of the American Chemical Society, 133(42), 16901-16910 (2011-08-25)
Aerobic oxidation reactions have been the focus of considerable attention, but their use in mainstream organic chemistry has been constrained by limitations in their synthetic scope and by practical factors, such as the use of pure O(2) as the oxidant
Janelle E Steves et al.
The Journal of organic chemistry, 80(21), 11184-11188 (2015-10-13)
Two solutions, one consisting of bpy/TEMPO/NMI and the other bpy/ABNO/NMI (bpy =2,2'-bipyridyl; TEMPO = 2,2,6,6-tetramethylpiperidine N-oxyl, ABNO = 9-azabicyclo[3.3.1]nonane N-oxyl; NMI = N-methylimidazole), in acetonitrile are shown to have good long-term stability (≥1 year) under air at 5 °C. The
Jessica M Hoover et al.
Nature protocols, 7(6), 1161-1166 (2012-05-29)
This protocol describes a practical laboratory-scale method for aerobic oxidation of primary alcohols to aldehydes, using a chemoselective Cu(I)/TEMPO (TEMPO = 2,2,6,6-tetramethyl-1-piperidinyloxyl) catalyst system. The catalyst is prepared in situ from commercially available reagents, and the reactions are performed in

Articles

Aerobic Alcohol Oxidation Solutions

Alcohol oxidation is one of the most frequently performed oxidation reactions in organic chemistry. The aldehyde and ketone products of alcohol oxidation are useful intermediates en route to complex molecules.

TEMPO Catalyzed Oxidations

TEMPO (2,2,6,6-Tetramethylpiperidinyloxy or 2,2,6,6-Tetramethylpiperidine 1-oxyl) and its derivatives are stable nitroxy radicals used as catalysts in organic oxidation reactions. TEMPO was discovered by Lebedev and Kazarnovskii in 1960. The stable free radical nature of TEMPO is due to the presence of bulky substituent groups, which hinder the reaction of the free radical with other molecules.

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