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P73803

Sigma-Aldrich

Pyrrolidine

99%

Synonym(s):

Tetrahydropyrrole, Tetramethyleneimine

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About This Item

Empirical Formula (Hill Notation):
C4H9N
CAS Number:
123-75-1
Molecular Weight:
71.12
Beilstein:
102395
EC Number:
204-648-7
MDL number:
MFCD00005249
UNSPSC Code:
12352100
PubChem Substance ID:
24898844
NACRES:
NA.22

vapor density

2.45 (vs air)

Quality Level

200

vapor pressure

128 mmHg ( 39 °C)
49 mmHg ( 20 °C)

Assay

99%

autoignition temp.

653 °F

expl. lim.

10.6 %

refractive index

n20/D 1.443 (lit.)

density

0.852 g/mL at 25 °C (lit.)

SMILES string

C1CCNC1

InChI

1S/C4H9N/c1-2-4-5-3-1/h5H,1-4H2

InChI key

RWRDLPDLKQPQOW-UHFFFAOYSA-N

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General description

Pyrrolidine is a heterocyclic building block used in organic synthesis and a scaffold for biologically active compounds.

Application

Pyrrolidine has been used for the synthesis of N-benzoyl pyrrolidine from benzaldehyde via oxidative amination. It may be used as a catalyst for the synthesis of N-sulfinyl aldimines from carbonyl compounds and sulfonamides.
Pyrrolidine can also be used to synthesize:
  • Taddol-pyrrolidine phosphoramidite, a ligand for rhodium-catalyzed [2+2+2] cycloaddition of pentenyl isocyanate and 4- ethynylanisole.
  • H,4 PyrrolidineQuin-BAM (′PBAM′), a selective catalyst for the aza-Henry addition of nitroalkanes to aryl aldimines.{88]
  • 1,2,3,3a,4,9-Hexahydropyrrolo[2,1-b]quinazoline by reacting with o-aminobenzaldehyde.

Signal Word

Danger

Hazard Statements

H225,H302 + H332,H314

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1A

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

37.4 °F - closed cup

Flash Point(C)

3 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Preparation of N-Sulfinyl Aldimines using Pyrrolidine as Catalyst via Iminium Ion Activation
Morales S, et al.
Organic Syntheses, 94, 346-346 (2017)
Enantioselective Rhodium-Catalyzed [2+2+2] Cycloaddition of Pentenyl Isocyanate and 4-Ethynylanisole: Preparation and Use of Taddol-pyrrolidine Phosphoramidite
Oberg KM, et al.
Organic Syntheses, 91, 150-150 (2014)
Metal?Free One?Pot Oxidative Amination of Aromatic Aldehydes: Conversion of Benzaldehyde to N?Benzoyl Pyrrolidine.
Ekoue?Kovi K & Wolf C
Organic Syntheses, 1-7 (2010)
o-Aminobenzaldehyde, Redox-Neutral Aminal Formation and Synthesis of Deoxyvasicinone
Zhang C, et al.
Organic Syntheses, 89, 274-274 (2012)
Pieter Van der Veken et al.
Journal of medicinal chemistry, 55(22), 9856-9867 (2012-11-06)
We have investigated the effect of regiospecifically introducing substituents in the P2 part of the typical dipeptide derived basic structure of PREP inhibitors. This hitherto unexplored modification type can be used to improve target affinity, selectivity, and physicochemical parameters in
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