ChemicalBook CAS DataBase List Pyrogallol

Pyrogallol synthesis

13synthesis methods

Product Name:Pyrogallol
CAS Number:87-66-1
Molecular formula:C6H6O3
Molecular Weight:126.11

Pyrogallol is prepared by heating dried gallic acid at about 200°C with the loss of carbon dioxide or by the chlorination of cyclohexanol to tetrachlorocyclohexanone, followed by hydrolysis.

Benzene, 1,2,3-tris[(trimethylsilyl)oxy]-

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Yield:87-66-1 96%

Reaction Conditions:

with methanol;1,3-disulfonic acid imidazolium hydrogen sulfate at 20; for 0.133333 h;Green chemistry;

Steps:

General procedure for the deprotection of trimethylsilyl ethers

General procedure: A mixture of the substrate (1 mmol), ionic liquid [Dsim]HSO4 (6.5 mg, ～0.02 mmol) in methanol (2 mL) was stirred at room temperature. After completion of the reaction (monitored by TLC), solvent was evaporated, water (1 mL) was added to the mixture, and stirred vigorously. Decantation of the mixture gave almost pure product(s). The products were characterized by comparison of their IR and NMR data. The ionic liquid was dried at 65 ?C under vacuum to remove moisture, and then reused.

References:

Shirini, Farhad;Khaligh, Nader Ghaffari;Akbari-Dadamahaleh, Somayeh [Journal of Molecular Catalysis A: Chemical,2012,vol. 365,p. 15 - 23]

149-91-7 Synthesis