Tetra-n-butylammonium hydrogen sulfate

• Catalog No.: A14047
• CAS Number: 32503-27-8
• M. F.: C16H37NO4S
• M. W.: 339.53428
• Purity: 97%

SYNONYMS

• Title: 正四丁基硫酸氢基铵
• IUPAC name: tetrabutylazanium hydrogen sulfate
• IUPAC Traditional name: tetrabutylammonium hydrogensulfate

DATABASE IDS

• CAS Number: 32503-27-8
• EC Number: 251-068-5
• MDL Number: MFCD00011637

PROPERTIES

• Purity: 97%
• Melting Point: 168-172°C
• GHS Hazard statements: H301-H315-H319-H335
• European Hazard Symbols: X
• GHS Precautionary statements: P261-P301+P310-P305+P351+P338-P302+P352-P405-P501A
• Risk Statements: 22-36/37/38
• Safety Statements: 26-36/37
• TSCA Listed: 是

REFERENCES

• For phase-transfer catalyzed conversion of nitriles to amides by alkaline H₂O₂, see: Synthesis, 243 (1980).
• In the dehydrohalogenation of aryl 2-haloethyl ethers to give vinyl ethers, this catalyst was found much more effective than the corresponding halides or benzyltriethylammonium salts: Synthesis, 688 (1979).
• The oxidation of primary alcohols to aldehydes by potassium chromate under phase-transfer conditions is better for higher homologues, where solubility in the aqueous phase is limited: Synthesis, 134 (1979). For phase-transfer catalyzed dichromate oxidation of secondary alcohols to ketones, see: Tetrahedron Lett., 1601 (1978).
• For use in the permanganate oxidation of benzylic positions, see Potassium permanganate, A12170.
• Widely used phase-transfer catalyst; see Appendix 2. Some illustrative applications are given below:
• Benzanilides have been N-alkylated in the presence of NaOH and K₂CO₃: Synth. Commun., 18, 2011 (1988).
• It was the most effective catalyst studied for the cyclization of ?-amino acids to ?-lactams by methanesulfonyl chloride and KHCO₃: Chem. Lett., 443 (1981).