ACS Materials Au,
Год журнала:
2022,
Номер
3(2), С. 123 - 131
Опубликована: Дек. 14, 2022
The
present
study
aims
at
investigating
the
performance
of
Friedel-Crafts
acylation
phenols
and
acyl
chlorides
over
PTA@MIL-53
(Fe)
catalyst
(phosphotungstic
acid
encapsulated
in
MIL-53
via
one-pot
method)
under
ultrasound
irradiation.
was
synthesized
using
irradiation
ambient
temperature
pressure.
Moreover,
X-ray
diffraction,
energy-dispersive
X-ray,
Fourier
transform
infrared,
scanning
electron
microscopy,
N2
physisorption,
inductively
coupled
plasma
optical
emission
spectrometry
characterization
analyses
were
performed
to
characterize
prepared
composite.
reactions
took
place
an
ultrasonic
environment
obtained
results
reveal
that
is
efficient
for
reactions.
regeneration
experiments
indicated
no
significant
change
even
after
being
reused
five
times.
Furthermore,
response
surface
methodology
applied
find
relationships
between
some
specific
variables
para-hydroxy
acetophenone
yield
as
a
response.
Finally,
validated
with
experimental
data,
which
model
good
agreement.
Tetrahedron Green Chem,
Год журнала:
2024,
Номер
4, С. 100048 - 100048
Опубликована: Дек. 1, 2024
Metal
oxides
are
versatile
catalysts
in
organic
synthesis,
exhibiting
diverse
properties
such
as
acidity,
basicity,
redox
behaviour,
and
stability.
Among
these,
tin
dioxide
(SnO₂)
stands
out
for
its
resilience
durability,
making
it
a
preferred
catalyst.
The
reduced
ionic
character
high
oxidation
state
(+4)
of
contribute
to
heightened
acidity.
Tin
based
materials
have
gained
significant
attention
heterocycle
cross-coupling,
decarboxylation,
ring-opening
ring-closing
reactions,
biodiesel
glycerol
transformations.
Additionally,
SnO₂-based
also
employed
photocatalysts
photo-electrocatalysts.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Июль 23, 2024
In
this
research
project,
a
versatile
procedure
has
been
designed
for
the
preparation
of
supported
copper@curcumin
on
magnetic
graphene
oxide
nanoparticles
(GO@Fe3O4@Cur–Cu).
The
structure
prepared
nanocatalyst
was
characterized
by
several
techniques
including;
Fourier
transform
infrared,
powder
X-ray
diffraction,
thermal
gravimetric
analysis,
energy
dispersive
inductively
coupled
plasma
optical
emission
spectroscopy,
vibrating
sample
magnetometer,
transmission
electron
microscopy,
and
scanning
microscopy
analyses.
catalytic
properties
GO@Fe3O4@Cur–Cu
were
examined
efficient
synthesis
polyhydroquinolines
as
well
sulfoxides
through
selective
oxidation
sulfides
in
presence
hydrogen
peroxide.
RSC Advances,
Год журнала:
2022,
Номер
12(43), С. 27723 - 27735
Опубликована: Янв. 1, 2022
The
synthesis
of
six-membered
oxygen-
and
nitrogen-containing
heterocycles
has
been
regarded
as
the
most
fundamental
issue
in
organic
chemistry
chemical
industry
because
these
are
used
producing
high-value
products.
In
this
study,
an
efficient,
economic,
sustainable,
green
protocol
for
their
multicomponent
developed.
one-pot
direct
Knoevenagel
condensation-Michael
addition-cyclization
sequences
transformation
aromatic
aldehydes,
malononitrile,
2-aminopyridine
generate
corresponding
1,8-naphthyridines
over
a
novel
mesoporous
bifunctional
organocatalyst
supported
cholorosulfonic
acid
[poly(triazine-benzene
sulfonamide)-SO3H
(PTBSA-SO3H)]
under
ambient
conditions.
catalyst
was
formation
1,8-naphthyridine
derivatives
six
runs.
current
strategy
provided
wider
substrate
range,
short
reaction
times.
Synthetic Communications,
Год журнала:
2023,
Номер
53(18), С. 1469 - 1505
Опубликована: Июнь 28, 2023
Medicinal
chemistry
and
synthetic
organic
rely
primarily
on
C-N
bonds
for
their
structures
because
a
variety
of
biologically
active
compounds,
including
natural
products
molecules,
contain
N-heterocyclic
as
subunits,
they
have
been
assigned
privileged
position
in
drug
development
due
to
improved
solubility
ability
form
salts,
both
which
contribute
oral
absorption
bio-availability.
In
recent
years,
the
copper-catalyzed
cross-coupling
reactions
progressed
rapidly
with
inexpensive,
readily
available,
insensitive
air,
low-toxicity
copper
catalysts.
The
coupling
strategy
has
used
make
N-heterocycles,
wide
range
applications
investigated
excellent
functional
group
tolerance.
current
review
explores
direct
bond
formation
cyclization
approaches
fabricate
triazole,
tetrazole,
various
other
derivatives
that
are
catalyzed
by
magnetically
retrievable
(II)-impregnated
silica-coated
iron
oxide
nanocatalysts.
Scientific Reports,
Год журнала:
2022,
Номер
12(1)
Опубликована: Ноя. 19, 2022
Abstract
The
magnetic
nanoparticles
coated
with
carbon
quantum
dot
and
copper
(I)
iodide
(Fe
3
O
4
@CQD@CuI)
were
used
as
eco-friendly
heterogeneous
Lewis
/
Brønsted
acid
sites
Cu
nanocatalysts.
In
the
first
step,
it
was
applied
in
synthesis
of
kojic
acid-based
dihydropyrano[3,2-
b
]pyran
derivatives
a
three-component
reaction
second
recyclable
catalyst
for
acid-1,2,3-triazole
based
CuI-catalyzed
azide/alkyne
cycloaddition
(CuAAC)
reaction.
characterized
fully
by
using
different
techniques
including
fourier
transform
infrared
spectroscopy
(FT-IR),
elemental
mapping
analysis,
X-ray
photoelectron
(XPS),
scanning
electron
microscopy
(SEM),
(EDX),
transmission
(TEM),
thermal
gravimetric
(TG)
value-stream
(VSM)
methods.
final
synthesized
identified
1
H-
13
C-NMR
spectroscopy.
