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339997

Sigma-Aldrich

(S)-(−)-Methyl p-tolyl sulfoxide

99%

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About This Item

Linear Formula:
CH3C6H4S(O)CH3
CAS Number:
5056-07-5
Molecular Weight:
154.23
Beilstein:
2324696
MDL number:
MFCD00151503
UNSPSC Code:
12191600
PubChem Substance ID:
24860755
NACRES:
NA.22

Assay

99%

form

solid

optical activity

[α]20/D −145°, c = 2 in acetone

optical purity

ee: 99% (HPLC)

mp

75-77 °C (lit.)

SMILES string

Cc1ccc(cc1)S(C)=O

InChI

1S/C8H10OS/c1-7-3-5-8(6-4-7)10(2)9/h3-6H,1-2H3/t10-/m0/s1

InChI key

FEVALTJSQBFLEU-JTQLQIEISA-N

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Application

(S)-(-)-Methyl p-tolyl sulfoxide can be used as a nucleophilic reagent to synthesize:
  • Optically active β-disulfoxides by reacting with arenesulfinic esters via formation of α-sulfinylcarbanion.
  • α-substituted N-hydroxylamines by treating with nitrones via preparation of (S)-(-)-methyl p-tolyl sulfoxide anion.
  • 2-O-benzyl-3,4-O-isopropylidene-L-erythrose by one-carbon homologation of 2,3-O-isopropylidene-L-glyceraldehyde.

Storage Class Code

11 - Combustible Solids

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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β -Disulfoxides. II. The Preparation of Some Optically Active β -Disulfoxides
Kunieda N, et al.
Bulletin of the Chemical Society of Japan, 49(1), 256-259 (1976)
A highly stereoselective synthesis of d-erythrose derivatives by one-carbon homologation of 2, 3-O-isopropylidene-d-glyceraldehyde with (R)-methyl p-tolyl sulfoxide.
Arroyo-Gomez Y, et al.
Tetrahedron Asymmetry, 11(3), 789-796 (2000)
The reaction of nitrones with (R)-(+)-methyl p-tolyl sulfoxide anion; asymmetric synthesis of optically active secondary amines.
Murahashi S-I, et al.
Tetrahedron Letters, 34(16), 2645-2648 (1993)

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