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Tropolone Tosylate
(CAS RN:38768-08-0 Product Number:T1574)


Tropolone Tosylate
Synonym 2-Toluenesulfonyloxytropone
Synonym 2-Tosyloxytropone

General Information

Product Number T1574

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Purity/Analysis Method >99.0%(GC)(T)
Storage Temperature
M.F. / M.W. C14H12O4S=276.31
CAS RN 38768-08-0
Related CAS RN
MDL Number MFCD00671574
Packaging and Container
  • Product Details
  • Safety & Regulations


Appearance White to Orange to Green powder to crystal
Purity(GC) min. 99.0 %
Purity(Ester Value) min. 99.0 %
Melting point 158.0 to 162.0 deg-C
Solubility in hot Dioxane almost transparency


Reaxys-RN 2133515
PubChem SID 87577332


Signal Word Warning
Hazard Statements
  • H341
  • :Suspected of causing genetic defects.
Precautionary Statements
  • P201
  • :Obtain special instructions before use.
  • P202
  • :Do not handle until all safety precautions have been read and understood.
  • P280
  • :Wear protective gloves, protective clothing, face protection.
  • P308+P313
  • :IF exposed or concerned: Get medical advice or attention.
  • P405
  • :Store locked up.
  • P501
  • :Dispose of contents/container through a waste management company authorized by the local government.

Transport Information

HS Number 2914500090


Synthesis of Tropone-fused Imidazole Derivatives

Typical Procedure:
To a mixture of 30% NaOH (6.85 g) and toluene (25 mL), tropolone tosylate (2.76 g, 10 mmol), acetamidine hydrochloride (1.28 g, 13.5 mmol) and tetrabutylammonium bromide (1.61 g, 5.0 mmol) are added successively and the mixture is stirred at 30 ℃ for 5 h. The reaction mixture is treated with excess saturated aqueous ammonium chloride and extracted with AcOEt (3 x 20 mL). The combined extract layers are washed with brine and dried over Na2SO4. The solvent is removed under the reduced pressure. Then, the residue is purified by silica gel column chromatography (AcOEt : MeOH = 50 : 1), affording the desired imidazole derivative (1.15 g, Y. 72%). Recrystallization from i-PrOH gives pale yellow needles.


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