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CAS RN: 2567792-04-3 | Product Number: U0150


Purity: >98.0%(GC)
  • N-Sulfinyl-tert-butoxyamine
  • tBuONSO
  • O-(tert-Butyl)-N-sulfinylhydroxylamine
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Product Number U0150
Purity / Analysis Method >98.0%(GC)
Molecular Formula / Molecular Weight C__4H__9NO__2S = 135.18 
Physical State (20 deg.C) Liquid
Store Under Inert Gas Store under inert gas
Condition to Avoid Air Sensitive
CAS RN 2567792-04-3
Reaxys Registry Number 37039374
PubChem Substance ID 468593100
Appearance Colorless to Light yellow clear liquid
Purity(GC) min. 98.0 %
Properties (reference)
Boiling Point 75 °C/30 mmHg
Flash point 27 °C
Specific Gravity (20/20) 1.06
Pictogram Pictogram
Signal Word Warning
Hazard Statements H226 : Flammable liquid and vapor.
Precautionary Statements P501 : Dispose of contents/ container to an approved waste disposal plant.
P240 : Ground/bond container and receiving equipment.
P210 : Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P233 : Keep container tightly closed.
P243 : Take precautionary measures against static discharge.
P241 : Use explosion-proof electrical/ ventilating/ lighting/ equipment.
P242 : Use only non-sparking tools.
P280 : Wear protective gloves/ eye protection/ face protection.
P370 + P378 : In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish.
P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P403 + P235 : Store in a well-ventilated place. Keep cool.
Related Laws:
Transport Information:
UN Number UN1993
Class 3
Packing Group III
TCI Practical Example: Synthesis of primary sulfonamides using tBuONSO

TCI反応実例: <i>t</i>BuONSOを用いた第一級スルホンアミドの合成

Used Chemicals


To a solution of tBuONSO (400 mg, 2.96 mmol), in THF (anhydrous, 12 mL) was added p-tolylmagnesium bromide (19% in tetrahydrofuran, ca. 1mol/L, 4.4 mL, 4.4 mmol) at -78 °C and the mixture was stirred at -78 °C for 1 hour. The suspension was warmed at room temperature and stirred for overnight. After that, methanol (1 mL) was add to the reaction mixture and the solvent was removed under reduced pressure. The residue was purified by column chromatography (ethyl acetate:hexane = 0:1 - 1:4 on silica gel) to give 4-methylbenzenesulfonamide as a white solid (407 mg, 80%).

Experimenter’s Comments

The reaction mixture was monitored by UPLC.

Analytical Data


1H NMR (400 MHz, CDCl3); δ 7.70 (d, 2H, J = 8.4 Hz), 7.36 (d, 2H, J = 8.1 Hz), 7.27 (brs, 2H), 2.33 (s, 3H).

Lead Reference

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