4 research outputs found
A Convergent, Modular Approach to Functionalized 2,1‑Borazaronaphthalenes from 2‑Aminostyrenes and Potassium Organotrifluoroborates
Azaborines
are an important class of compounds with applications
in both medicinal chemistry and materials science. The first borazaronaphthalene,
2-chloro-2,1-borazaronaphthalene, was reported in 1959; however, access
to more highly functionalized substructures has been limited because
of the harsh reaction conditions required to displace the chloride
on boron. A convergent approach has been developed to synthesize disubstituted
2,1-borazaronaphthalenes from <i>N</i>-substituted 2-aminostyrenes
and potassium organotrifluoroborates, where the potassium organotrifluoroborate
is converted to the active R–BX<sub>2</sub> species (X = Cl
or F) in situ by addition of a fluorophile. Starting from aryl-, heteroaryl-,
alkynyl-, alkenyl-, and alkyltrifluoroborates, a library of highly
functionalized 2,1-borazaronaphthalenes were synthesized in one step
under mild, transition-metal-free conditions