Assembly of Fluoranthenes via Cobalt-Catalyzed [2 + 2 + 2] Cycloaddition of 1,6-Diynes with Alkynes
The Journal of Organic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 13, 2025
A
series
of
polyaryl-substituted
fluoranthenes
is
built
in
good
to
excellent
yields
via
Earth-abundant
metal-catalyzed
[2
+
2+
2]
cycloaddition
1,6-diynes
with
alkynes
developed.
This
method
runs
smoothly
using
a
cheap
catalytic
system
(CoI2/dppe/Zn)
as
the
catalyst.
Generally,
this
strategy
exhibits
low
cost,
high
efficiency,
atom
economy,
and
functional
group
tolerance.
Additionally,
both
terminal
alkynes,
especially
heteroaryl-substituted
acetylenes,
internal
alkyne,
tolerate
work.
Furthermore,
photophysical
properties
selected
also
investigated.
Язык: Английский
Synthesis of Polyaryl‐Substituted Azafluoranthenes via Co‐Catalyzed [2+2+2] Cycloaddition of 1,6‐Diynes with Nitriles
Advanced Synthesis & Catalysis,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 8, 2024
Abstract
Herein,
we
demonstrate
the
synthesis
of
azafluoranthene
derivatives
under
mild
conditions
via
[2+2+2]
cycloaddition
1,6‐diynes
and
nitriles
catalyzed
by
CoBr
2
/dppp,
exhibiting
good
atom
economy.
This
procedure
uses
an
inexpensive
ligand
earth‐abundant
metal
as
catalyst
to
lower
cost
synthesis.
Several
azafluoranthenes
are
produced
in
28–95%
yields
using
this
approach,
featuring
conditions,
wide
substrate
scope,
functional
group
tolerance.
The
fluorescence
spectra
some
indicate
that
these
scaffolds
have
photophysical
properties
for
material
science.
Язык: Английский
Diverse reactivity of maleimides in polymer science and beyond
Polymer International,
Год журнала:
2024,
Номер
74(4), С. 296 - 306
Опубликована: Ноя. 5, 2024
Abstract
Maleimides
are
remarkably
versatile
functional
groups,
capable
of
participating
in
homo‐
and
copolymerizations,
Diels–Alder
(photo)cycloadditions,
Michael
additions,
other
reactions.
Their
reactivity
has
afforded
materials
ranging
from
polyimides
with
high
upper
service
temperatures
to
hydrogels
for
regenerative
medicine
applications.
Moreover,
maleimides
have
proven
be
an
enabling
chemistry
pharmaceutical
development
bioconjugation
via
straightforward
modification
cysteine
residues.
To
exert
spatiotemporal
control
over
reactions
maleimides,
multiple
approaches
been
developed
photocage
nucleophiles,
dienes,
dipoles.
Additionally,
further
substitution
the
maleimide
alkene
(e.g.
monohalo‐,
dihalo‐,
thio‐,
amino‐
methyl‐maleimides,
among
substituents)
confers
tunable
dynamicity,
as
well
responsive
mechanical
optical
properties.
In
this
mini‐review,
we
highlight
diverse
functionality
underscoring
their
notable
impact
polymer
science.
This
moiety
related
heterocycles
will
play
important
role
future
innovations
chemistry,
biomedical,
research.
©
2024
The
Author(s).
Polymer
International
published
by
John
Wiley
&
Sons
Ltd
on
behalf
Society
Chemical
Industry.
Язык: Английский