Halogenated dicyanobenzene-based photosensitizer (3DPAFIPN) as a thermally activated delayed fluorescence (TADF) used in gram-scale photosynthesis 3,4-dihydropyrimidin-2-(1H)-one/thione derivatives via a consecutive visible-light-induced electron-transfer pathway
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.
Language: Английский
9-mesityl-10-methylacridinium perchlorate (Mes-Acr-Me+ClO4−) as a novel metal-free donor–acceptor (D–A) photocatalyst: visible-light-induced access to tetrahydrobenzo[b]pyran scaffolds through a single-electron transfer (SET) pathway
Research on Chemical Intermediates,
Journal Year:
2024,
Volume and Issue:
50(7), P. 2993 - 3007
Published: May 20, 2024
Language: Английский
1,1,1,3,3,3-Hexafluoro-2-propanol (HFIP) as a reusable promoting medium for the catalyst-free and green synthesis of dihydropyrano[2,3-c]pyrazole scaffolds
Results in Chemistry,
Journal Year:
2024,
Volume and Issue:
9, P. 101629 - 101629
Published: July 1, 2024
A
manufactured
protocol
that
is
both
helpful
and
free
of
catalyst
has
been
presented
for
the
production
dihydropyrano[2,3-c]pyrazole
frameworks
in
polyfluorinated
alcohol
as
a
reusable
promoting
medium.
All
reactions
are
completed
quickly,
products
obtained
astounding
yields.
Notably,
convenient
approach
remarkable
yields,
avoids
use
hazardous
solvents
or
reagents,
simple
to
operate,
only
requires
one
pot.
The
1,1,1,3,3,3-hexafluoro-2-propanol
(HFIP)
was
extremely
stable
could
be
repeated
four
times
without
significant
basic
alteration
action,
making
it
ideal
large-scale
organic
production.
Language: Английский
Synthesis of dihydropyrano[2,3-c]pyrazole scaffolds by methylene blue (MB+) as a photo-redox catalyst via a single-electron transfer (SET)/energy transfer (EnT) pathway
Current Research in Green and Sustainable Chemistry,
Journal Year:
2023,
Volume and Issue:
7, P. 100381 - 100381
Published: Jan. 1, 2023
A
new
environmentally
friendly
plan
was
created
to
make
dihydropyrano
[2,3-c]pyrazole
structures
without
using
metals.
This
involves
combining
ethyl
acetoacetate,
hydrazine
hydrate,
aldehyde
derivatives,
and
malononitrile
in
a
radical
tandem
Knoevenagel-Michael
cyclocondensation
reaction.
We
used
metal-free
methylene
blue
(MB+)
create
special
functions
that
respond
light.
These
can
transfer
electrons
energy
water
at
room
temperature
light
as
source
of
the
air.
The
amount
product
made
is
pretty
consistent
(between
81
98
%,
with
an
average
91.8
%),
it
gets
quickly
3
7
min,
5.3
min).
important
thing
mentioned
conversation
process
handle
different
types
chemicals
while
still
being
fast
giving
good
results.
results
show
this
technique
successful
easy
way
get
just
one
step.
Methylene
very
little
chemical
reaction
happen.
leads
high
amounts
product,
saves
energy,
for
environment.
It
helps
use
up
all
starting
materials
efficiently,
time
by
not
needing
separate
chromatography,
reduces
waste.
photocatalyst
use.
creates
many
characteristics
environment
last
long
time.
turnover
number
(TON)
frequency
(TOF)
scaffolds
were
calculated.
interesting
cyclization
on
gram
scale
be
achieved,
showing
industries.
Language: Английский
Visible Light Assisted Synthesis of Tetrahydrobenzo[ b ]pyrans Using 4CzIPN, a Carbazole-Based Photocatalyst
Organic Preparations and Procedures International,
Journal Year:
2024,
Volume and Issue:
56(4), P. 317 - 326
Published: Jan. 29, 2024
Language: Английский
TBAHS-Catalyzed Simple and Eco-friendly Protocol for the Synthesis of Novel Bioactive 2-Amino-4-aryl-5-oxo-5,6,7,8-tetrahydro-4H-chromene Derivatives
Shruthika D. Rakhe,
No information about this author
Shreyash Mahurkar,
No information about this author
Ruchika More
No information about this author
et al.
Russian Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
60(4), P. 723 - 727
Published: April 1, 2024
Language: Английский
A Recyclable Halide Perovskite Photocatalyst as a Single-electron Redox Mediator: Radical-initiated Gram-scale Photosynthesis of Pyrano[2,3 -d ]pyrimidines Induced by Visible Light
Organic Preparations and Procedures International,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 11
Published: Aug. 12, 2024
Language: Английский
Synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives in a reusable catalyst/solvent; 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP)
Current Research in Green and Sustainable Chemistry,
Journal Year:
2024,
Volume and Issue:
9, P. 100427 - 100427
Published: Jan. 1, 2024
Language: Английский
Visible Light Assisted Preparation of Pyrano[2,3 -d ] pyrimidines via a Proton-Coupled Electron Transfer (PCET) Pathway Using a Carbazole-based Photocatalyst (4CzIPN) as a Novel Donor-acceptor Fluorophore
Organic Preparations and Procedures International,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 9
Published: Dec. 16, 2024
Language: Английский