Synthesis and Structural Characterization of Diazulenylborinic Acid

Voltammetric characterisation of diferrocenylborinic acid in organic solution and in aqueous media when immobilised into a titanate nanosheet film

“…The separation of the first and second redox process, ΔE p,ox = Δ(E mid 1 − E mid 2), also decreases when going from organic to aqueous conditions. This may also suggest a 32 1.539/1.550 1.379 1,2-FcBOMe 32 1.556/1.556 1.361 Diazulenylborinic acid 33 1.568/1.571 1.348 Bis(pentafluorophenyl)borinic acid 34 solvent polarity effect and better compensation of the first Fe(III) ferrocenyl charge in the more polar aqueous environment.…”

Development of Heterocycle-Substituted and Fused Azulenes in the Last Decade (2010–2020)

“…Wakamiya, Scott, and their colleagues reported the synthesis and properties of extended π-electron molecules in which the oxygen-bridged triarylamines are connected to an azulene ring, for application in perovskite solar cells [ 71 ]. The precursor, 1,3,5,7-tetraborylazulene 152 , is obtained by iridium-catalyzed Hartwig–Miyaura borylation of azulene ( 1 ) with bis(pinacolato)diboron with 38% as isolated yield ( Scheme 51 ) [ 72 ]. Synthesis of the target molecule, tetrasubstituted azulene 153 , is achieved by multiple Suzuki–Miyaura cross-coupling of 152 with mono-brominated oxygen-bridged triarylamine in 58% yield.…”