2,4,6-TRIMETHYLPYRYLIUM TETRAFLUOROBORATE Chemical Properties

Melting point:

224-226°C

solubility 

Acetonitrile (Slightly), Methanol (Slightly, Heated)

form 

powder to crystaline

color 

White to Orange to Green

Water Solubility 

Soluble in water and methanol.

BRN 

3639361

InChI

InChI=1S/C8H11O.BF4/c1-6-4-7(2)9-8(3)5-6;2-1(3,4)5/h4-5H,1-3H3;/q+1;-1

InChIKey

PYOPRIFMELCENN-UHFFFAOYSA-N

SMILES

[B-](F)(F)(F)F.C1(C)C=C([O+]=C(C)C=1)C

CAS DataBase Reference

773-01-3(CAS DataBase Reference)

EPA Substance Registry System

Pyrylium, 2,4,6-trimethyl-, tetrafluoroborate(1-) (773-01-3)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36/37/39

RIDADR 

UN 1759 8/PG III

TSCA 

TSCA listed

HS Code 

2932.99.9090

HazardClass 

IRRITANT

PackingGroup 

III

MSDS

• Language:English Provider:ALFA

2,4,6-TRIMETHYLPYRYLIUM TETRAFLUOROBORATE Usage And Synthesis

Uses

It is used in the radical Arylation Reactions of 4, 6, 8-Trimethylazulene.

Synthesis

Method 1: Acetic anhydride (100 mL, 1.06 mol, 13.0 eq.) and tert-butanol (8.00 mL, 84.2 mmol, 1.00 eq.) were added to a round-bottom flask equipped with a condenser and a dropping funnel. Fluoroboric acid (14 mL, 78 mmol, 0.95 eq.) was added dropwise. During its addition, the temperature was raised to 80°C. After completion of the exothermic reaction, the mixture was cooled to 5??C and cold Et 2 O was added, the precipitate was collected, washed with cold Et 2 O and dried. 2,4,6-Trimethylpyranium tetrafluoroborate was obtained as a colorless solid (11.6 g, 55.4 mmol, 71%). 1H NMR (300 MHz, CD3OD, 300 K) δ= 7.87 (s, 2H, CHarom), 2.88 (s, 6H, 2× CH3), 2.72 (s, 3H, CH3). 13 C NMR (75MHz, CDCl 3, 300K) δ= 179.5 (Cq), 134.1 (Cq), 124.3 (CH), 21.1 (CH 3), 20.7 (CH 3). 19F NMR (282MHz, CD3OD, 300K) δ= -154.7. HRMS (ESI) m/z = 123.0804 Calculated values. MS (ESI): C8H11O [M] +, measured value: 123.0762. Spectral data is consistent with previously reported data.

2,4,6-TRIMETHYLPYRYLIUM TETRAFLUOROBORATE(773-01-3)Related Product Information

• Centchroman
• Fluoroboric acid
• 2-(4-METHOXYPHENYL)-4,6-DIPHENYLPYRYLIUM TETRAFLUOROBORATE
• 2,4,6-TRIMETHYLPYRYLIUM TETRAFLUOROBORATE
• 2,4,6-TRIPHENYLPYRYLIUM TETRAFLUOROBORATE
• 2-Methyl-4,6-diphenylpyryliumtetrafluoroborate
• (E)-4-(2-(4-Methoxyphenyl)ethenyl)-2,6-diphenylpyrriliumtetrafluoroborate
• 8-(5-(6,7-DIHYDRO-2,4-DIPHENYL-5H-1-BENZOPYRAN-8-YL)-2,4-PENTADIENYLIDENE)-5,6,7,8-TETRAHYDRO- 2,4-DIPHENYL-1-BENZOPYRYLIUM TETRAFLUOROBORATE
• (E)-2-(2-(4-Cyanophenyl)ethenyl)-4,6-diphenylpyrriliumtetrafluoroborate