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900685

Sigma-Aldrich

2,4,6-Tri(p-tolyl)pyrylium tetrafluoroborate salt

≥95%

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About This Item

Empirical Formula (Hill Notation):
C26H23BF4O
CAS Number:
Molecular Weight:
438.26
UNSPSC Code:
12161600
NACRES:
NA.22

Quality Level

Assay

≥95%

form

powder

reaction suitability

reagent type: catalyst
reaction type: Photocatalysis

mp

298-303 °C

Application

Excitable by blue LEDs, this photocatalyst was reported by the Nicewicz laboratory for catalysis of O-aryl carbamothioates to S-aryl carbamothioates at ambient temperatures, an improvement from the elevated reaction temperatures traditionally needed in the Newman-Kwart rearrangment or palladium catalysis. Effective for scale-up or flow chemistry, this triarylpyrylium salt provides convenient access to thiophenols from phenols.
It can also catalyze visible light-initiated, living cationic polymerization of 4-methoxystyrene with methanol under metal-free conditions.

Product can be used with our line of photoreactors: Including Penn PhD (Z744035) & SynLED 2.0 (Z744080)

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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Visible light photoinitiated metal-free living cationic polymerization of 4-methoxystyrene.
Perkowski A J, et al.
Journal of the American Chemical Society, 137(24), 7580-7583 (2015)

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