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448-61-3 - 2,4,6-Triphenylpyrylium tetrafluoroborate, 97% - A18217 - Alfa Aesar

A18217 2,4,6-Triphenylpyrylium tetrafluoroborate, 97%

CAS Number
448-61-3
Synonyms

Size Price ($) Quantity Availability
5g 30.70
25g 112.00
100g 371.00
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2,4,6-Triphenylpyrylium tetrafluoroborate, 97%

MDL
MFCD00012001
EINECS
207-186-4

Chemical Properties

Formula
C23H17BF4O
Formula Weight
396.20
Melting point
248-254°
Sensitivity
Moisture Sensitive
Solubility
Insoluble in water, ethyl alcohol, diethyl ether. Soluble in trifluroacetic acid.

Applications

2,4,6-Triphenylpyrylium tetrafluoroborate is used as a sensitizer to carry out the photo oxidation of cathecol. It is also used in the preparation of three N-alkylpyridinium photosensitizers by reacting with (1R,2S)-(-)-norephedrine, (S)-(+)-2-(aminomethyl)pyrrolidine and (R)-(-)-1-cyclohexylethylamine.

Notes

Moisture Sensitive. Store away from oxidizing agents, water/moisture. Store under inert gas. Keep the container tightly closed and place it in a cool, dry and well ventilated condition.

Literature References

K Hollmann. [Experiences with replacement of the eyelid-levator].Fortschr Kiefer Gesichtschir.1977,2298-99.

Mercedes Alvaro.; Pilar Formentín.; Hermenegildo García.; Emilio Palomares.; María J Sabater. Chiral N-alkyl-2,4,6-triphenylpyridiniums as enantioselective triplet photosensitizers. laser flash photolysis and preparative studies.J Org Chem.2002,67(15), 5184-5189.

Amines react with pyrylium salts to give N-alkylpyridinium salts. Since the pyridine can be displaced by a variety of nucleophiles, the result is that the amine has been converted to a useful alkylating species: J. Chem. Soc., Perkin 1, 418 (1979). Reviews: Tetrahedron, 36, 679 (1980); Angew. Chem. Int. Ed., 23, 420 (1984); Russ. Chem. Rev., 51, 469 (1982):

For a review on use as an electron-transfer photosensitizer, see: Chem. Rev., 94, 1063 (1994).

GHS Hazard and Precautionary Statements

Hazard Statements: H301-H315-H319-H335

Toxic if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P280-P301+P310-P305+P351+P338-P304+P340-P362-P312-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Beilstein
3586533
Harmonized Tariff Code
2932.99
TSCA
No
RTECS
UZ1370000

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