Ipso-Nitration of Boronic Esters Enabled by Ferric Nitrate Nonahydrate (Fe(NO3)3·9H2O) in HFIP
Organic Letters,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 13, 2025
We
describe
in
this
work
an
operationally
facile
and
generally
applicable
ipso-nitration
of
boronic
esters
by
Fe(NO3)3·9H2O
hexafluoroisopropanol
(HFIP),
allowing
us
fast
access
to
various
nitroarenes
that
are
currently
difficult
obtain
via
traditional
electrophilic
C–H
nitrations.
In
contrast
previous
deborylative
ipso-nitrations,
new
protocol
utilized
less
reactive
more
stable
organoboron
reagents
therefore
had
significantly
improved
substrate
scope
functional
group
tolerance,
which
was
exemplified
the
late-stage
natural
products,
pharmaceuticals,
biologically
active
molecules.
Язык: Английский
Cu-Catalyzed Synthesis of Symmetric Diarylamines from Organoboronic Acids Using NaNO2 as the Amino Source
The Journal of Organic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 7, 2025
A
copper-catalyzed
novel
synthesis
of
symmetric
diarylamines
was
achieved
from
aryl
boronic
acids
and
NaNO2.
This
protocol
employs
as
the
commercially
available
arylation
reagents
sodium
nitrite
(NaNO2)
cheap,
stable,
solid
amino
source.
Under
a
simple
ligand-
base-free
copper
catalytic
system
(CuCl
sole
catalyst),
wide
range
could
be
obtained
in
moderate
to
good
yields.
Notably,
use
Na15NO2
produce
15N-labeled
diarylamines,
which
would
otherwise
difficult
prepare
by
known
methods.
Язык: Английский