Catalytic Si/B Exchange Condensation: A Green B–C Coupling Method That Provides Access to Monodisperse (Het)arylborane ‘Trimers’
作者:Holger Helten、Lars Fritze、Nicolas Riensch
DOI:10.1055/s-0037-1610849
日期:2019.1
metal-free B–C coupling method using catalytic Si/B exchange condensation is demonstrated by the synthesis of a series of monodisperse (het)arylborane oligomers with four (het)arene moieties and three boron centers (i.e., ‘trimers’). Photophysical and electrochemical investigations evidenced effective π-conjugation over the (het)arene rings and the boron centers. The potential of our metal-free B–C coupling
Pyridalthiadiazole acceptor-functionalized triarylboranes with multi-responsive optoelectronic characteristics
作者:Xiaodong Yin、Kanglei Liu、Yi Ren、Roger A. Lalancette、Yueh-Lin Loo、Frieder Jäkle
DOI:10.1039/c6sc03097a
日期:——
A new class of Ar2B–π–A dyads and A–π–B(Ar)–π–A triads that feature strong organic acceptor moieties (A = pyridalthiadiazole, PT) attached to a central triarylborane were synthesized via Stille cross-coupling of ArB(Th–SnMe3)2 (Th = thiophenediyl, Ar = 2,4,6-tri-tert-butylphenyl (Mes*) or 2,4,6-tris(trifluoromethylphenyl) (FMes)) with one or two equivalents of dibromopyridalthiadiazole. Single-crystal
Highly Electron-Deficient and Air-Stable Conjugated Thienylboranes
作者:Xiaodong Yin、Jiawei Chen、Roger A. Lalancette、Todd B. Marder、Frieder Jäkle
DOI:10.1002/anie.201403700
日期:2014.9.8
the boron atoms despite the presence of highly bulky 2,4,6‐tri‐tert‐butylphenyl (Mes*) or 2,4,6‐tris(trifluoromethyl)phenyl (FMes) groups. Short B⋅⋅⋅F contacts, which lead to a pseudotrigonal bipyramidal geometry in the FMes species, have been further studied by DFT and AIM analysis. In contrast to the Mes* groups, the highly electron‐withdrawing FMes groups do not diminish the Lewis acidity of boron