ACS Materials Au,
Journal Year:
2022,
Volume and Issue:
3(2), P. 123 - 131
Published: Dec. 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.
RSC Advances,
Journal Year:
2022,
Volume and Issue:
12(40), P. 26023 - 26041
Published: Jan. 1, 2022
Herein,
we
delignated
the
synthesis
of
a
novel
inorganic
sulfurous
magnetic
solid
acid
catalyst
by
immobilization
an
extremely
high
content
sulfuric
functionalities
on
amorphous
silica-modified
hercynite
nanomagnetic
core-shell
via
simple
method.
Silica
(SSA)
modified
nanocomposite
(hercynite@SSA)
combines
excellent
recoverability
and
stability
characteristics
(which
can
be
regarded
as
ferro
spinel
with
Fd3m
space
group
cubic
crystal
structure)
strong
Brønsted
properties
-SO3H
groups.
This
was
found
to
efficient
facile
for
bis(pyrazolyl)methanes
two
different
one-pot
multicomponent
methodologies
under
green
conditions.
The
hercynite@SSA
shows
catalytic
activity
reusability
in
ethanolic
medium
among
materials.
A
plausible
reaction
mechanism
is
proposed
this
synthesis.
Applied Organometallic Chemistry,
Journal Year:
2022,
Volume and Issue:
36(12)
Published: Sept. 24, 2022
The
present
study
is
the
first
report
on
synthesis
and
catalytic
performance
of
Hercynite
nanoparticles
capped
with
a
novel
Schiff
base–manganese(II)
complex
brought
from
synthetic
procedure.
solid
support
catalyst
were
characterized
using
various
analytical
techniques.
characterization
results
suggest
excellent
dispersibility,
stability,
high
Mn
content
under
surface,
small
size
catalyst,
which
leads
to
activity
selectivity.
Moreover,
proved
be
sustainable
recyclable
for
rapid
chromene‐
pyran‐annulated
heterocycles
ambient
conditions.
effect
crucial
parameters
was
investigated
optimized.
scope
reaction
extended
aryl
aldehydes
keto–enol
tautomeric
pairs
(2‐hydroxy‐1,4‐naphthoquinone
or
dimedone),
corresponding
2‐amino‐3‐cyano‐4
H
‐chromene
‐pyran
products
obtained
yield
(82–99%)
at
low
time
(10–115
min).
Significantly,
indicated
magnetic,
cost‐effective,
nontoxic
properties,
result
in
having
recycling
efficiency
(5
cycles).
Journal of the Turkish Chemical Society Section A Chemistry,
Journal Year:
2025,
Volume and Issue:
12(1), P. 1 - 14
Published: March 3, 2025
Heterogeneous
Bronsted
acid
is
one
of
the
most
promising
compounds
that
can
be
used
as
a
catalyst
in
chemical
production,
and
certainly
have
positive
impact
on
environment.
This
research
includes
preparation
heterogeneous
by
using
rice
hulls
starting
material.
The
prepared
was
characterized
FTIR,
XRD,
TGA,
SEM-EDX,
TEM,
elemental
analysis.
FTIR
results
showed
presence
N-H
S=O
absorption
bands
within
expected
range
acid.
specific
surface
area
determined
Brunauer-Emmett-Teller
(BET)
nitrogen
adsorption
method
205.42
m2/g,
average
pore
diameters
are
3.69
nm,
2,4,5-Trisubstituted
imidazole
derivatives
were
reacting
substituted
aldehydes
with
benzil
ammonium
acetate
solid
catalyst.
main
advantages
this
safe,
cheap,
short
reaction
conditions.
In
addition,
reused.
Applied Organometallic Chemistry,
Journal Year:
2022,
Volume and Issue:
36(10)
Published: July 18, 2022
An
efficient
synthetic
method
for
the
heterogenization
of
bifunctional
zwitterionic
HEPES
catalyst
on
LDH
modified
γ‐Fe
2
O
3
magnetic
nanoparticles
(MNPs)
was
developed
to
create
a
novel
polar
catalytic
environment
tandem
catalysis.
The
efficiency
resulted
acid/base
(γ‐Fe
@Cu
Al‐LDH/HEPES)
investigated
in
Biginelli‐like
synthesis
biologically
active
pyrazolo[3,4‐d]pyrimidines
via
cyclocondensation
3‐methyl,
1‐phenyl‐H1‐pyrazole‐5‐ol
with
various
aromatic
aldehydes
and
urea
derivatives
mixture
water
ethanol
(1:1)
under
reflux
conditions.
Besides,
desired
products
were
reached
high
conversions
powerful
reusability.
Utilization
simple
mild
reaction
conditions,
hybrid
groups,
short
time,
green
safe
solvent,
performance
good
recyclability,
easy
purification
products,
magnetically
work‐up
make
this
methodology
an
interesting
effective
option
Biginelli
reaction.
