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T71803

Sigma-Aldrich

Pivalic acid

99%

Synonym(s):

2,2-Dimethylpropionic acid, Trimethylacetic acid

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About This Item

Linear Formula:
(CH3)3CCO2H
CAS Number:
75-98-9
Molecular Weight:
102.13
Beilstein/REAXYS Number:
969480
EC Number:
200-922-5
MDL number:
MFCD00004194
UNSPSC Code:
12352100
PubChem Substance ID:
24900421
NACRES:
NA.22

vapor density

3.6 (vs air)

vapor pressure

9.75 mmHg ( 60 °C)

assay

99%

reaction suitability

reaction type: C-H Activation

bp

163-164 °C (lit.)

mp

32-35 °C (lit.)

density

0.889 g/mL at 25 °C (lit.)

functional group

carboxylic acid

SMILES string

OC(C(C)(C)C)=O

InChI

1S/C5H10O2/c1-5(2,3)4(6)7/h1-3H3,(H,6,7)

InChI key

IUGYQRQAERSCNH-UHFFFAOYSA-N

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General description

Pivalic acid is a carboxylic acid, employed as a ligand to synthesize cerium(IV) hexanuclear clusters.

Application

Pivalic acid can be employed:
  • As a co-catalyst with palladium for the arylation of unactivated arenes and N-heterocycles.
  • As an additive to facilitate the carbonylative suzuki reactions to synthesize biaryl ketones from aryl iodides and arylboronic acids by using palladium nanoparticles as catalyst.
  • In the cyclization reaction of benzamides with alkynes to synthesize isoquinolones in the presence of 8-aminoquinoline ligand and cobalt catalyst.

Caution

Pungent odour/Stench

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pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

147.2 °F - closed cup

flash_point_c

64 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Certificates of Analysis (COA)

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Guotao Li et al.
Journal of the American Chemical Society, 130(12), 3740-3741 (2008-03-04)
Propargylic pivalates with electronically unbiased internal alkynes are selectively transformed into (1Z,3E)-2-pivaloxy-1,3-dienes containing various functionalities. The unusual selectivity of 1,2-acyloxy migration over the structurally preferred 3,3-rearrangement is realized. This reaction is highly stereoselective and offers rapid access to dienes for
Tobias Illg et al.
ChemSusChem, 4(3), 392-398 (2011-02-09)
The two-step synthesis of tert-butyl peroxypivalate is performed in a single-channel microreactor. The first step, the deprotonation of tert-butyl hydroperoxide, is done in a simple mixer tube setup. The residence time section for the second reaction step is equipped with
Toshiaki Shimasaki et al.
Angewandte Chemie (International ed. in English), 49(16), 2929-2932 (2010-03-17)
Catalytic amination: The title reaction demonstrates the use of aryl carboxylates as suitable electrophilic coupling substrates in catalytic amination reactions. N-heterocyclic carbene ligands and NaOtBu promote the amination of aryl pivalates through the cleavage of normally unreactive aryl carbon-oxygen bonds
Phosphine-free, palladium-catalyzed arylation of heterocycles through C-H bond activation with pivalic acid as a cocatalyst.
Dongbing Zhao et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 15(6), 1337-1340 (2008-12-31)
Lukas J Goossen et al.
Angewandte Chemie (International ed. in English), 48(20), 3569-3571 (2009-03-13)
Crucial breakthroughs in the activation of the C(aryl)-O bond of phenol derivatives were achieved almost simultaneously by two research groups (see scheme; Cy = cyclohexyl). Garg et al. coupled a range of aryl pivalates with arylboronic acids to give unsymmetrical
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