2,3,7,8-Tetrafluoro-5-(trifluoromethyl)-5H-dibenzo[b,d]thiophen-5-ium Tetrafluoroborate

Synonym
Product Category
Product Code
CAS Number
MDL Number
Pubchem CID
Reaxys RN
Umemoto Reagent III
Trifluoromethylating reagents,Trifluoromethylthiolating Reagents
KUMIBF01
1961266-64-7
 

30188502
image-155171-Trimethyl(trifluoromethyl)silane_reagent.png
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2,3,7,8-Tetrafluoro-5-(trifluoromethyl)-5H-dibenzo[b,d]thiophen-5-ium Tetrafluoroborate
BF4*C13H4F7S
412.03
≥98.0%(HPLC)
Solid
152ºC
1g,5g,10g,50g and 100g
Store at room temperature
2,3,7,8-Tetrafluoro-5-(trifluoromethyl)-5H-dibenzo[b,d]thiophen-5-ium Tetrafluoroborate(Novel Umemoto's Reagent III) is a powerful, thermally stable, one-pot-preparable and recyclable reagent for electrophilic trifluoromethylation and trifluoromethylthiolation with various types of nucleophilic substrates, such as carbanions, (hetero)aromatics, alkenes, alkynes, thiols, sulfinates, and phosphines.
S-(Trifluoromethyl)dibenzothiophenium salts, known as Umemoto's reagents, have two significant drawbacks that have hampered their practical application: (1) synthesis involving many steps and (2) the formation of large amounts of dibenzothiophene as waste after trifluoromethylation. New Umemoto's reagents are developped by substituting fluorine at specific positions on the dibenzothiophenium rings has resulted in massive improvements in the synthesis, properties, reactivity, and applications of these compounds.
Powerful, Thermally Stable, One-Pot-Preparable, and Recyclable Electrophilic Trifluoromethylating Agents: 2,8-Difluoro- and 2,3,7,8-Tetrafluoro-S-(trifluoromethyl)dibenzothiophenium Salts. [1]
Reference:
[1] T. Umemoto, B. Zhang, T. Zhu, X. Zhou, P. Zhang, S. Hu, Y. Li, J. Org. Chem., 2017, 82(15), pp 7708-7719.
Signal Word
Hazard Statements
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HS Code
RIDADR
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Not Dangerous Goods


NONH for all modes of transport

1. Product Specification
2. Safety Data Sheet
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