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684341

Sigma-Aldrich

(S)-(–)-5-(2-Pyrrolidinyl)-1H-tetrazole

96%

Synonym(s):

(S)-(–)-2-Tetrazol-5-ylpyrrolidine, Proline Tetrazole Catalyst

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About This Item

Empirical Formula (Hill Notation):
C5H9N5
CAS Number:
33878-70-5
Molecular Weight:
139.16
MDL number:
MFCD10000886
UNSPSC Code:
12352005
PubChem Substance ID:
329760905
NACRES:
NA.22

Assay

96%

form

solid

optical activity

[α]20/D -9.0°, c = 1 in methanol

mp

253-258 °C

SMILES string

C1CN[C@@H](C1)c2nnn[nH]2

InChI

1S/C5H9N5/c1-2-4(6-3-1)5-7-9-10-8-5/h4,6H,1-3H2,(H,7,8,9,10)/t4-/m0/s1

InChI key

XUHYQIQIENDJER-BYPYZUCNSA-N

Application

(S)-(−)-5-(2-Pyrrolidinyl)-1H-tetrazole can be used as an organocatalyst:
  • To prepare enantioselective chiral 1,2-oxazines from achiral ketones via an intramolecular Wittig reaction.
  • To synthesize diastereoselective Michael addition products by addition of aliphatic aldehydes to β-nitrostyrene.
  • In the direct asymmetric α-fluorination of linear and branched aldehydes using N-fluorobenzenesulfonamide as the fluorinating agent.

Organocatalyst used for:
  • Direct asymmetric aldol reactions between acetone and aldehydes yielding β -hydroxy ketone and for synthesizing 1,1,1-trichloro-2-alkanols
  • Mannich reactions for synthesis fo α -amino acids and generation of 1,4-diamines
  • Conjugate additions of malonates to enones

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H301,H315,H319,H335

Hazard Classifications

Acute Tox. 3 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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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Oelke, A. et al.
Synlett, 2548-2548 (2006)
Sirirat Kumarn et al.
Chemical communications (Cambridge, England), (30), 3211-3213 (2006-10-10)
A sequential, organocatalysed asymmetric reaction to access chiral 1,2-oxazines from achiral ketone starting materials is reported, which proceeds in moderate to good yields and excellent enantioselectivity.
A highly selective, organocatalytic route to chiral 1, 2-oxazines from ketones
Kumarn S, et al.
Chemical Communications (Cambridge, England), 3211-3213 (2006)
Asymmetric organocatalyzed Michael addition of aldehydes to β-nitrostyrene in ionic liquids
Mevciarova M, et al.
Tetrahedron Asymmetry, 20(20), 2403-2406 (2009)
Direct asymmetric α-fluorination of aldehydes
Steiner DD, et al.
Angewandte Chemie (International Edition in English), 117(24), 3772-3776 (2005)

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