[A18217] CAS 448-61-3 | 2,4,6-Triphenylpyrylium tetrafluoroborate, 97%

CAS : 448-61-3
UN# : UN2811
MDL : MFCD00012001
Hazard Class : 6.1
EINECS : 207-186-4
Packing Group : III

Chemical Properties

Formula : C23H17BF4O
Formula weight : 396.20
Melting Point : 248-254°
Sensitivity : Moisture Sensitive. Ambient temperatures.
Form : Crystalline powder
Solubility : Insoluble in water, ethyl alcohol, diethyl ether. Soluble in trifluroacetic acid.

Literature References

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).

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.

Grade Specifications

GHS Hazard and Precautionary Statements

Hazard Statements : H301-H315-H319-H335Toxic if swallowed.Causes skin irritation.Causes serious eye irritation.May cause respiratory irritation.
Precautionary Statements : P261-P301+P310-P305+P351+P338-P302+P352-P405-P501aAvoid breathing dust/fume/gas/mist/vapours/spray.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 ON SKIN: Wash with plenty of soap and water.Store locked up.Dispose of contents/container in accordance with local/regional/national/international regulations.Other References:Beilstein: 3586533UN#: UN2811