Synthetic Communications,
Journal Year:
2024,
Volume and Issue:
54(8), P. 672 - 693
Published: March 20, 2024
Polyethyleneimine-supported
cobalt
(II)
chloride
as
a
novel
polymeric
nanocomposite
acidic
catalyst
for
the
one-stage
transesterification
reaction
of
ethyl
acetate
with
various
alcohols
is
reported.
The
was
characterized
by
Fourier
transform
infrared
spectroscopy,
X-ray
powder
diffraction,
transmission
electron
microscopy,
scanning
dynamic
light
scattering
technique,
and
thermal
gravimetric
analysis.
Furthermore,
inductively
coupled
plasma
atomic
absorption
spectroscopy
were
used
to
determine
quantity
Cobalt
nanoparticles
in
catalyst.
By
adding
(0.10
g,
0.20
mol%)
n-hexane/chloroform
(5.0
cm3)
solvent
under
reflux
conditions,
studies
demonstrated
successful
reactions
excellent
yields
(80–98%)
short
times
(0.50–1.30
h)
using
substrates
on
scale
1.0
mmol.
Seven
consecutive
could
be
performed
without
significantly
decreasing
its
activity.
most
noteworthy
aspects
this
process
are
low
cost,
safety,
environmental
friendliness
due
catalyst's
non-toxicity,
straightforward
operation,
effective
outcomes.
RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(41), P. 28964 - 28974
Published: Jan. 1, 2023
In
this
work
a
novel
nanomagnetic
copper
complex
was
employed
in
one-pot
multicomponent
A
3
coupling
reactions
of
aldehydes,
amines,
and
alkynes
as
efficient
catalyst
for
preparing
propargylamines.
Journal of Heterocyclic Chemistry,
Journal Year:
2024,
Volume and Issue:
61(5), P. 693 - 702
Published: Feb. 20, 2024
Abstract
Cu(II)
Complex
of
tetradentate
Schiff‐base
supported
on
silica
[Cu(II)
Schiff‐base@‐SiO
2
]
catalyzed
reactions
aryl
aldehydes
with
carbonyl
compounds
(dimedon/4‐hydroxy
coumarin/1,3‐cyclohexadion)
and
malononitrile
in
aqueous
media
(H
O:EtOH)
to
preparation
benzo[
b
]pyrans
3,4‐dihydropyrano[
c
]chromanes.
Also,
using
this
nanocatalyst,
2‐(5‐substituted
phenyl)furan‐2‐carboxaldehyde
derivatives
gave
novel
tetrahydrobenzo[
]pyran
]chromane
high
yields
H
O:EtOH
under
reflux
conditions.
The
key
advantages
catalytic
systems
are
the
formation
products,
(78%–93%),
short
reaction
time,
broad
substrate
scope,
environmentally
friendly
conditions
also,
without
need
column
chromatography
for
purification.
Furthermore,
nanocatalyst
can
be
reused
six
times
losing
activity.
Nanoscale Advances,
Journal Year:
2023,
Volume and Issue:
5(18), P. 4925 - 4933
Published: Jan. 1, 2023
Palladium
complex-supported
on
boehmite
(Pd(0)-SMTU-boehmite)
nanoparticles
were
synthesized
and
characterized
by
using
XRD,
SEM,
EDS,
TGA,
BET,
ICP
FT-IR
techniques.
When
applied
as
a
new
catalyst
for
C-C
coupling
reactions
of
Suzuki-Miyaura
Mizoroki-Heck
in
PEG-400
solvent,
the
Pd(0)-SMTU-boehmite
showed
excellent
activity
recyclability.
The
study
palladium
leaching
ICP-OES
technique
hot
filtration
led
to
exhibiting
stability
Applied Organometallic Chemistry,
Journal Year:
2023,
Volume and Issue:
38(1)
Published: Nov. 28, 2023
The
synthesis
and
characterization
of
MCM‐41
magnetic
mesoporous
material,
which
has
been
modified
with
zirconium‐thiouracil
complex
(M‐MCM‐41@TU‐ZrO),
conducted
thoroughly
analyzed
using
an
array
techniques
such
as
X‐ray
diffraction
(XRD),
energy‐dispersive
spectroscopy
(EDX),
elemental
mapping,
scanning
electron
microscopy
(SEM),
Fourier
transform
infrared
(FT‐IR),
Brunauer‐Emmett‐Teller
(BET),
inductively
coupled
plasma‐optical
emission
spectrometry
(ICP‐OES),
thermogravimetric
analysis
(TGA)
vibrating
sample
magnetometer
(VSM).
catalytic
performance
M‐MCM‐41@TU‐ZrO
was
tested
in
the
phenyl
aryl
sulfides
through
a
three‐component
coupling
reaction
halides/phenolic
esters
phenylboronic
acid
sulfur
powder
presence
base
PEG200
at
80–90°C.
Also,
symmetrical
diaryl
halides
nanocatalyst
dimethyl
sulfoxide
120°C
investigated.
A
major
novelty
is
that
this
first
time
highly
efficient
magnetically
recyclable
zirconium
used
for
unsymmetrical
arylboronic
acid/S
8
system
thiolating
agent
phenolic
cross‐coupling
partners.
other
advantages
method
are
follows:
(a)
structurally
diverse
have
synthesized
good
to
high
yields
PEG
green
solvent;
(b)
starting
materials,
source,
catalyst
commercially
available,
cheap,
non‐toxic,
chemically
stable;
(c)
easily
removed
from
mixture
external
magnet
reused
numerous
times
without
any
significant
change
activity.
Applied Organometallic Chemistry,
Journal Year:
2023,
Volume and Issue:
37(11)
Published: Sept. 14, 2023
Photocatalytic
conversion
of
organic
compounds
has
recently
emerged
as
a
cost‐effective,
safe,
and
easy‐to‐operate
procedure
to
synthesize
value‐added
materials.
In
this
study,
the
magnetic
titanium
dioxide‐based
(Fe
3
O
4
/SiO
2
/TiO
)
photocatalyst
was
designed
conjugated
derivatives
tetrahydroquinoline
through
photoinduced
electron
transfer
(PET)
reaction.
Chlorophyll
b
immobilized
on
surface
dioxide,
natural
visible‐light‐sensitive
compound
using
3‐aminopropyltriethoxysilane
(APTES)
coupling
agent
containing
terminal
amine
‐NH
‐Ch
improve
light
harvesting
ability.
Fourier
transform
infrared
(FT‐IR),
powder
X‐ray
diffraction
(PXRD),
thermogravimetric
analysis
(TGA),
energy‐dispersive
spectrometer
(EDS),
vibrating
sample
magnetometer
(VSM)
results
confirmed
successful
synthesis
Fe
.
Scanning
microscope
(SEM)
transmission
(TEM)
images
displayed
preserved
spherical
morphology
b‐modified
dioxide
highly
active
under
visible‐light
irradiation
toward
cyclization
(
E
)‐3‐[4‐(dimethylamino)phenyl)]‐1‐arylprop‐2‐en‐1‐one
with
1‐aryl‐1
H
‐pyrrole‐2,5‐dione
achieve
new
structure
in
high
yields
at
ambient
temperature,
air.
The
incorporation
chlorophyll
plays
an
important
role
photocatalytic
mechanism,
facilitating
conduction
band
TiO
Moreover,
property
enabled
easy
recovery
improved
its
reusability
up
three
runs.
characteristics
were
studied
by
FT‐IR,
CHN,
1
NMR,
13
C
NMR
analyses.
