The author of ãDevelopment of Imidazo[1,2-a]pyridine Derivatives with an Intramolecular Hydrogen-Bonded Seven-Membered Ring Exhibiting Bright ESIPT Luminescence in the Solid Stateã?were Mutai, Toshiki; Muramatsu, Tatsuya; Yoshikawa, Isao; Houjou, Hirohiko; Ogura, Masaru. And the article was published in Organic Letters in 2019. Formula: C6H7BO3 The author mentioned the following in the article:
Imidazo[1,2-a]pyridine derivatives with different hydroxyaryl units (1-3), which could potentially form an intramol. hydrogen-bonded seven-membered ring in either a planar or a twisted conformation, were newly developed, and the effect of conformation and steric repulsion on the excited-state intramol. proton transfer (ESIPT) luminescence was evaluated. Among them, 1 and 2 formed an intramol. hydrogen-bonded seven-membered ring in the crystalline state and exhibited efficient ESIPT luminescence in the solid state (quantum yield up to 0.45).2-Hydroxyphenylboronic acid(cas: 89466-08-0Formula: C6H7BO3) was used in this study.
2-Hydroxyphenylboronic acid(cas: 89466-08-0) belongs to acyl phenylboronic acid. Phenylboronic acid (PBA) has been used to extract β-blockers (a class of aminoalcohol-containing drugs) from aqueous solution, rat, and human plasma. Formula: C6H7BO3
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