Scientific Reports,
Год журнала:
2022,
Номер
12(1)
Опубликована: Авг. 23, 2022
Abstract
A
novel,
efficient,
and
recoverable
nanomagnetic
catalyst
bearing
the
semicarbazide
linkers,
namely,
Fe
3
O
4
@SiO
2
@OSi(CH
)
-
N
(3-pyridoyl
sulfonic
acid)semicarbazide
(FSiPSS)
was
designed,
synthesized
characterized
by
use
of
various
techniques
such
as
FT‐IR,
EDX,
elemental
mapping
analysis,
XRD,
SEM,
TEM,
TGA/DTA,
BET,
VSM.
Then,
catalytic
capability
novel
prepared
FSiPSS
successfully
investigated
in
synthesis
diverse
pyranopyrazoles
through
a
one-pot
four-component
condensation
reaction
ethyl
acetoacetate,
hydrazine
hydrate,
aromatic
aldehydes,
malononitrile
or
cyano-acetate
help
ultrasonication
very
short
time,
good
to
high
yields
easy
work-up
(Fig.
1).
ACS Sustainable Chemistry & Engineering,
Год журнала:
2017,
Номер
5(7), С. 6175 - 6182
Опубликована: Май 20, 2017
A
highly
efficient,
eco-friendly
protocol
has
been
developed
for
synthesis
of
spirooxindole-pyran
derivatives
via
one-pot,
three-component
reaction
isatins,
malononitrile,
and
enolizable
C–H
activated
compounds
(2-hydroxynaphthalene-1,4-dione,
4-hydroxycoumarine
dimedone)
under
visible-light
irradiation
in
water-ethyl
lactate
at
room
temperature.
The
reported
approach
shows
significant
advantages
such
as
a
high
yield,
mild
clean
conditions,
the
application
visible
light
source
energy,
absence
catalyst,
use
ethyl
lactate/water
an
environmentally
friendly
solvent,
one-pot
multicomponent
temperature,
no
chromatographic
separation,
applicability
large-scale
synthesis.
Nanotechnology Reviews,
Год журнала:
2017,
Номер
7(1), С. 43 - 68
Опубликована: Окт. 10, 2017
Abstract
Recovery
and
reusability
of
catalysts
is
an
important
aspect
in
modern
catalysis
research
especially
organic
synthesis.
Compared
to
the
conventional
separation,
magnetic
separation
has
emerged
as
a
robust,
highly
efficient,
easy
rapid
technique
for
products
catalysts.
Cobalt
ferrite
nanoparticles
are
well-known
material,
recognized
CoFe
2
O
4
MNPs,
can
be
used
both
catalyst
versatile
support
functionalization
metals,
organocatalysts.
In
recent
times,
clearly
experienced
renaissance
area
utility
cobalt
(CoFe
MNPs)
nanocatalysts
based
on
their
ability
recovery
reusability;
activity
these
MNPs
was
investigated
category
reactions.
this
review,
fabrication,
characterization,
application
(CF-MNPs)
reactions
have
well
summarized.
Green Chemistry,
Год журнала:
2017,
Номер
19(16), С. 3729 - 3751
Опубликована: Янв. 1, 2017
Recent
advances
in
the
application
of
microwave-assisted
heterogeneous
catalytic
synthesis
approaches
are
reviewed
with
additional
inputs
on
energy
efficiency
and
scale-up
synthesis.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(2), С. 2169 - 2175
Опубликована: Янв. 10, 2019
By
employing
cheap
and
biodegradable
natural
deep
eutectic
solvent
as
the
catalyst
reaction
media,
selective
selenocyanation
of
activated
alkynes
via
an
intermolecular
H-bonding
activation
pathway
has
been
achieved,
which
allows
for
efficient
construction
various
Z-vinyl
selenolates.
New Journal of Chemistry,
Год журнала:
2017,
Номер
41(15), С. 7108 - 7115
Опубликована: Янв. 1, 2017
A
novel
magnetic
metal–organic
framework,
NiFe2O4@MOF-5,
was
prepared
and
demonstrated
to
be
a
highly
efficient
catalyst
for
the
one-pot
three-component
reaction
of
aldehyde,
indole,
kojic
acid.
In
this
work,
an
efficient
method
for
the
immobilization
of
L-proline
on
magnetic
nanoparticles
was
offered
and
evaluated
as
a
recoverable
nanocatalyst
synthesis
2,4,6-triarylpyridines
through
one-pot
three-component
reaction
acetophenone,
aryl
aldehydes
ammonium
acetate.
This
article
is
first
report
catalytic
application
functionalized
in
organic
reactions
nanocatalyst.
novel
proved
to
be
effective
provided
products
high
excellent
yield
under
solvent-free
conditions.
The
structure
obtained
characterized
by
Fourier
transform
infrared
spectrophotometry
(FT-IR),
field-emission
scanning
electron
microscopy
(FE-SEM),
thermogravimetric
analysis
(TGA)
energy-dispersive
X-ray
spectroscopy
(EDX).
TGA
result
revealed
that
it
stable
up
200
°C
using
catalyst
reactions.
FE-SEM
image
synthesized
showed
has
nearly
core-shell
spherical
shape
uniform
size
distribution
with
average
about
80
nm.
Moreover,
could
easily
recovered
facile
separation
forces
recycled
several
times
without
significant
loss
its
activity.
benefits
study
are
simplicity,
nontoxicity,
low
cost,
simple
workup,
environmentally
benign
nature.
