S7556

Sulfur trioxide pyridine complex

97%

• Synonym(s): NSC 75831, Pyridine sulfur trioxide complex
• Empirical Formula (Hill Notation): C₅H₅NO₃S
• CAS Number: 26412-87-3
• Molecular Weight: 159.16
• Beilstein: 3704116
• EC Number: 247-683-3
• MDL number: MFCD00012437
• UNSPSC Code: 12352303
• PubChem Substance ID: 24899756
• NACRES: NA.22

Properties

• Assay: 97%
• reaction suitability: reagent type: oxidant
• SMILES string: O=S(=O)=O.c1ccncc1
• InChI: 1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H;
• InChI key: UDYFLDICVHJSOY-UHFFFAOYSA-N

Description

Application

• Sulfation agent

Reactant for:

• Preparation of azido anologs of pregnanolone
• Sulfate esters of morphine derivatives
• Gold nanoparticles capped with sulfate-ended ligands as anti-HIV agents

Sulfur trioxide-pyridine (SO₃-py) complex can be used to convert the allylic or benzylic hydroxyl group of compounds such as geraniol, farnesol, and 1-indanol into sulfate monoester, which is a good leaving group. This method is highly useful in the total synthesis of sesquiterpenes.
As a sulfating agent, SO₃-py complex can be used for the preparation of sulfated-chitins, sulfated hyaluronan (HyaS) derivatives and sulfated starch.

Safety Information

• Pictograms: GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H302,H314
• Precautionary Statements: P260 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1B
• Storage Class Code: 8A - Combustible corrosive hazardous materials
• WGK: WGK 3
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves