Berionni, Guillaume et al. published their research in Journal of the American Chemical Society in 2013 | CAS: 929626-27-7

Potassium benzofuran-2-yltrifluoroborate (cas: 929626-27-7) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.Reference of 929626-27-7

Electrophilic Aromatic Substitutions of Aryltrifluoroborates with Retention of the BF3– Group: Quantification of the Activating and Directing Effects of the Trifluoroborate Group was written by Berionni, Guillaume;Morozova, Varvara;Heininger, Maximilian;Mayer, Peter;Knochel, Paul;Mayr, Herbert. And the article was included in Journal of the American Chemical Society in 2013.Reference of 929626-27-7 This article mentions the following:

Kinetics and mechanisms of transition-metal free reactions of furyl, thienyl and indolyl trifluoroborates with benzhydrylium (Ar2CH+) and iminium (Me2N+=CHR) ions have been investigated. In contrast to common belief, substitutions at CH positions are often faster than ipso-substitutions of the BF3K group, because BF3K activates the position attached to boron by a factor of 103-104 while adjacent CH positions are activated by factors of 105-106. Several reactions that have previously been interpreted as ipso-substitutions actually proceed via initial substitution at a vicinal or remote CH position, followed by protodeborylation. If the proton released during electrophilic substitution at a CH position is trapped by a base, the BF3– group can be preserved. Remote reactions of heteroaryl trifluoroborates with iminium ions provide straightforward access to novel zwitterionic ammonium or iminium trifluoroborates, which have been characterized by single-crystal X-ray analyses. In the experiment, the researchers used many compounds, for example, Potassium benzofuran-2-yltrifluoroborate (cas: 929626-27-7Reference of 929626-27-7).

Potassium benzofuran-2-yltrifluoroborate (cas: 929626-27-7) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.Reference of 929626-27-7

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem