ChemPhotoChem,
Journal Year:
2024,
Volume and Issue:
8(8)
Published: March 12, 2024
Abstract
The
C10a‐acetoxylated
tetrahydroazepino[1,2‐
a
]indole‐6,11‐diones
are
class
of
tricyclic
oxindoles
that
feature
an
α‐keto‐
N
,
O
‐acetal
substructure,
rendering
them
highly
susceptible
to
SET
reduction
followed
by
fragmentation.
In
protic
medium,
they
undergo
PCET‐assisted
two‐step
including
interposed
C−O
bond
cleavage
can
be
initiated
photocatalytically
as
well
cathodic
reduction,
and
which
generates
nucleophilic
ketyl
radicals.
the
presence
acrylonitrile
DIPEA
additional
reactants,
photoinduced
reaction
unfolds
tandem
reduction/ketyl
radical
conjugate
addition,
furnish
C10a‐reduced,
C11‐cyanoethyl‐substituted
azepino‐[1,2‐
]indole
derivatives
with
high
stereoselectivity.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
63(7)
Published: Dec. 27, 2023
Herein,
we
report
the
use
of
isonitriles
as
alkyl
radical
precursors
in
light-mediated
hydro-
and
deuterodeamination
reactions.
The
reaction
is
scalable,
shows
broad
functional
group
compatibility
potential
to
be
used
late-stage
functionalization.
Importantly,
method
general
for
C
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: June 24, 2023
Based
on
the
Biginelli
reaction
of
β-ketoesters,
arylaldehydes,
and
urea/thiourea,
we
created
a
green
radical
synthesis
procedure
for
3,4-dihydropyrimidin-2-(1H)-ones/thiones.
A
single-electron
redox
mediator
was
applied
to
solution
ethanol
in
an
air
environment,
at
room
temperature,
with
blue
LEDs
as
renewable
energy
source
order
create.
The
objective
this
research
is
create
halide
perovskite
that
widely
available,
affordable,
recyclable,
economically
feasible.
factor
mentioned
discussion
tolerates
variety
donating
withdrawing
functional
groups
while
still
offering
very
fast
rate
excellent
yields.
range
yields
quite
uniform
(86-94%,
average:
90.4%),
times
quick
(4-8
min,
5.8
min).
Furthermore,
gram-scale
cyclization
shows
it
applicable
use
industry.
Additionally,
CsPbBr3
stable
can
be
used
six
row
without
experiencing
significant
structural
changes
or
activity
loss,
which
has
been
extremely
helpful
meeting
industrial
needs
environmental
issues.
Frontiers in Chemistry,
Journal Year:
2024,
Volume and Issue:
12
Published: March 26, 2024
A
sustainable
methodology
for
the
synthesis
of
pyrano
[2,3-
d
]
pyrimidine
scaffolds
have
been
developed,
employing
Knoevenagel-Michael
tandem
cyclocondensation
reaction
barbituric
acid/1,3-dimethylbarbituric
acid,
malononitrile,
and
aryl
aldehydes.
This
study
elucidates
advancement
a
environmentally
conscious
approach
to
synthesizing
this
category
chemical
compounds.
In
present
investigation,
novel
photosensitizer
comprising
proflavine
(PFH
+
)
bio-photocatalyst
was
employed
in
an
aqueous
medium,
subjected
air
atmosphere
at
room
temperature,
stimulated
by
blue-light-emitting
diode
(LED)
harness
renewable
energy.
The
fundamental
objective
initiative
is
utilize
(PS)
biocatalyst
that
has
recently
can
be
conveniently
acquired,
priced
affordably.
photocatalyst,
demonstrates
ability
initiate
photoinduced-electron
transfer
(PET)
through
exposure
visible
light.
property
endows
photocatalyst
with
practical
efficient
method
achieving
high
effectiveness,
energy
efficiency,
friendly
outcomes.
current
research
endeavor
examining
turnover
number
(TON)
frequency
(TOF)
pertaining
scaffolds.
Moreover,
it
validated
cyclization
gram-scale
feasible
various
industrial
settings.
A
carbazole-based
photocatalyst
(MD)
incorporating
a
dicyanovinyl
acceptor
and
exhibiting
superior
redox
potential
has
been
demonstrated
for
sustainable
photocatalytic
approach
to
synthesize
indolyl
diarylmethanes
2-substituted
benzimidazoles.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(17)
Published: May 1, 2025
Abstract
4‐CzIPN
is
a
traditional
electron
donor
and
acceptor
fluorophore
that
uses
carbazolyl
as
an
donating
dicyanobenzene
withdrawing
source.
Its
broad
redox
potential,
high
chemical
resistance
wide
applicability
makes
it
unique
metal‐free
photocatalyst.
This
study
summarizes
the
recent
development
of
photoredox
catalyst
for
variety
heterocyclic
construction
over
last
four
years
(2021‐2024).
Frontiers in Chemistry,
Journal Year:
2024,
Volume and Issue:
12
Published: March 1, 2024
Background:
Organic
dyes
often
have
shorter
lifetimes
in
the
excited
state,
which
is
a
major
obstacle
to
development
of
effective
photoredox
methods.
The
scientific
community
has
shown
great
deal
interest
certain
class
organic
chromophores
because
their
unique
characteristics
and
effectiveness.
One
characteristic
molecules
under
research
thermally
activated
delayed
fluorescence
(TADF),
only
observed
with
tiny
energy
gap
(often
less
than
0.2
eV)
between
lowest
two
states,
i.e.,
singlet
state
(S
1
)
triplet
(T
).
extended
states
arising
from
TADF
simplicity
redox
potentials
may
be
altered
make
isophthalonitrile
family
an
attractive
option
for
photocatalyst
applications.
Methods:
Biginelli
reaction
β
-ketoesters,
arylaldehydes,
urea/thiourea
been
used
build
sustainable
technique
production
3,4-dihydropyrimidin-2-(1
H
)-one/thione
derivatives.
In
present
study,
green
radical
synthesis
approach
this
compounds
addressed
depth.
As
photocatalyst,
new
halogenated
dicyanobenzene-based
photosensitizer
was
employed
study.
renewable
source
by
blue
LED,
it
dissolved
ethanol,
at
room
temperature
air
atmosphere.
primary
objective
employ
novel
donor-acceptor
(D-A)
based
on
cyanoarene
that
affordable,
easily
available,
innovative.
Findings:
3DPAFIPN
[2,4,6-tris(diphenylamino)-5-fluoroisophthalonitrile]
induces
single-electron
transfer
(SET)
response
visible
light,
offering
straightforward,
eco-friendly,
highly
efficient
process.
Additionally,
we
determined
derivatives
turnover
frequency
(TOF)
number
(TON).
It
also
demonstrated
gram-scale
cyclization
workable
method
industrial
purposes.
Journal of Heterocyclic Chemistry,
Journal Year:
2024,
Volume and Issue:
61(9), P. 1455 - 1461
Published: July 10, 2024
Abstract
The
combination
of
visible
light,
a
renewable
and
green
energy
source,
rose
bengal,
non‐toxic
organic
dye
as
photoredox
catalyst,
is
an
easy
efficient
method
for
synthesizing
3,4‐dihydropyrimidin‐2(1
H
)‐ones/thiones
in
EtOH
at
ambient
temperature
very
short
reaction
time.
present
work
offers
simple
operation,
workup,
rapid
conversion,
excellent
product
yields,
while
accommodating
wide
range
substrates.
Rose
bengal‐based
photocatalytic
approach
permits
foremost
sustainability,
which
delivers
economic
environmental
rewards.
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: July 17, 2023
Abstract
Increased
energy
consumption
as
a
result
of
population
growth
and
industrialization
necessitates
the
use
renewable
sources
in
field
chemistry.
Nonrenewable
release
not
only
greenhouse
gases
but
also
other
hazardous
pollutants
that
are
damaging
to
all
living
things.
This
plainly
mandates
researchers'
source
is
both
environmentally
friendly
cost-effective.
study
shows
(sunlight)
can
be
used
synthesize
tetrahydrobenzo[
b
]pyran
scaffolds
using
Knoevenagel–Michael
cyclocondensation
aldehyde
derivatives,
malononitrile,
dimedone
via
three-condensation
domino
reaction.
research
establishes
new
role
for
solar
synthesis
under
catalyst-solvent-free
conditions,
with
outstanding
yields,
shorter
reaction
time,
great
atom
economy.
cyclization
may
done
on
gram
scale
free,
safe,
clean
from
concentrated
radiation
(CSR),
indicating
reaction's
potential
industrial
applications.
