Del Grosso, Alessandro published the artcileSimple inexpensive boron electrophiles for direct arene borylation, Computed Properties of 239075-02-6, the publication is Chemical Communications (Cambridge, United Kingdom) (2011), 47(46), 12459-12461, database is CAplus and MEDLINE.
Borenium ions, stabilized by coordination of hindered aromatic amines, were shown to act as reactive electrophiles for direct borylation of activated arenes and heterocyclic compounds, such as indoles and thiophenes. 2,6-Lutidine complex of dichloroborenium, [2,6-Me2C5H3N·BCl2][AlCl4] was isolated and characterized by single-crystal x-ray diffraction, featuring low degree of π-bonding and high electrophilicity. Friedel-Crafts-type reaction of ArH with BCl3, catalyzed by AlCl3 in the presence of N,N-dimethyltoluidine or 2,6-lutidine as borenium stabilizing agents, followed by esterification with 2.2-3 equiv of pinacol, gave pinacolboronates ArBpin (Ar = 1-TIPS-3-pyrrolyl, 1-methyl-3-indolyl, 2,2′-bithiophen-5-yl, thieno[3,2-b]thien-2-yl, 4-(phenyl)(p-tolyl)aminophenyl, etc.). Electrophilic direct borylation is facilitated, and arene substrate scope enhanced, by using electrophiles derived from inexpensive reagents; specifically an amine, BCl3 and AlCl3.
Chemical Communications (Cambridge, United Kingdom) published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Computed Properties of 239075-02-6.
Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts