Pyrylium tetrafluoroborate
ALDRICH/906719 - ≥95%
Synonym: Pyry-BF4
CAS Number: 80279-50-1
Empirical Formula (Hill Notation): C5H5BF4O
Molecular Weight: 167.90
Linear Formula: C5H5BF4O
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 906719-1G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 906719-5G
| assay | ≥95% |
| form | powder |
| storage temp. | 2-8°C |
| Application: | Pyrylium tetrafluoroborate is used for the functionalization of heterocyclic amines, activating them for nucleophilic substitution. As demonstrated by the Cornella lab, the intermediate pyridinium salts can react with a vast array of nucelophiles to form new C-N, C-O, and C-S bonds, making pyrylium tetrafluoroborate a valuable reagent for late-stage functionalization. |
| Other Notes: | Selective Functionalization of Aminoheterocycles by a Pyrylium Salt   Selective Late-Stage Sulfonyl Chloride Formation from Sulfonamides Enabled by PyryBF4 Synthesis of Sulfonyl Fluorides from Sulfonamides |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥95% |
| Storage Temp. | 2-8°C |
| UNSPSC | 12352107 |