RSC Advances,
Год журнала:
2025,
Номер
15(23), С. 18535 - 18547
Опубликована: Янв. 1, 2025
This
study
reports
the
fabrication
and
characterization
of
a
novel
magnetic
Co-Ni/Fe3O4@mesoporous
silica
hollow
sphere
(Co-Ni/Fe3O4@MMSHS)
nanocomposite.
Then,
it
was
used
as
an
effective
nanocatalyst
to
efficiently
synthesize
tetrazoles
from
various
aromatic
nitriles
sodium
azide
through
[2
+
3]
cycloaddition
reaction.
provided
multi-step
process
involving
preparation
carbon
spheres,
their
magnetization
with
Fe3O4,
loading
cobalt
nickel
nanoparticles,
subsequent
coating
calcining
form
mesoporous
structure.
The
characterized
using
techniques,
including
FT-IR,
XRD,
FE-SEM,
EDS,
elemental
mapping,
BET,
VSM,
confirming
its
successful
synthesis
desired
properties.
catalytic
performance
Co-Ni/Fe3O4@MMSHS
evaluated
for
range
tetrazole
derivatives.
results
demonstrated
high
activity,
achieving
excellent
product
yields
(up
98%)
within
short
reaction
times
(8-44
minutes)
under
mild
conditions.
catalyst
recyclability
reusability,
making
environmentally
friendly
economically
viable
choice
synthesis.
emphasizes
potential
rationally
designed
nanocatalysts
efficient
sustainable
organic
transformations.
Applied Organometallic Chemistry,
Год журнала:
2022,
Номер
36(6)
Опубликована: Март 1, 2022
Abstract
A
highly
stable
and
efficient
heterogeneous
catalyst
was
successfully
prepared
by
hydrothermal
reaction
of
Zinc
nitrate
with
citric
acid.
To
produce
a
novel
Zn‐based
MOF
catalyst,
Zn
ions
were
coordinated
the
ligand
functional
groups
that
can
be
regarded
as
an
alpha‐hydroxy
acid
containing
three
carboxylic
acids
(COOH)
one
hydroxyl
(OH)
group
attached
to
three‐carbon
skeleton.
It
found
Zn‐CA‐MOFs
compound
participate
in
synthesis
5‐substituted
1H‐tetrazole
pyranopyrazole
molecules,
selectively
efficiently
high
yield
short
period
time.
As
presented,
demonstrates
excellent
reusability
stability
recycled
up
five
times
without
significant
loss
reactivity.
Heterogeneity
analysis
showed
no
leaching
active
species
occurred
during
recycling
process
Zn‐CA‐MOFs.
Nanoscale Advances,
Год журнала:
2023,
Номер
5(23), С. 6594 - 6605
Опубликована: Янв. 1, 2023
In
this
research,
a
novel
nanomagnetic
tetra-azamacrocyclic
Schiff
base
complex
of
copper(ii)
was
produced
via
post-synthetic
surface
modification
an
Fe3O4
by
silane-coupling
agent
that
contains
acetylacetone
functionalities
at
the
end
its
chain.
Moreover,
target
Cu
involves
tetradentate
ligand
obtained
from
template
reaction
with
o-phenylenediamine
and
Cu(NO3)2·3H2O.
Furthermore,
prepared
nominated
as
[Fe3O4@TAM-Schiff-base-Cu(II)].
The
Fourier-transform
infrared
(FT-IR)
analysis
indicates
presence
Schiff-base-Cu
in
catalyst.
X-ray
spectroscopy
(EDS)
TGA
reveal
approximately
6-7%
catalyst
comprises
hydrocarbon
moieties.
scanning
electron
microscope
(SEM)
transmission
microscopy
(TEM)
images
demonstrate
uniformly
shaped
particles,
nearly
spherical
nature,
sizes
ranging
9
to
18
nm.
[Fe3O4@TAM-Schiff-base-Cu(II)]
applied
for
click
synthesis
diverse
range
5-substituted-1H-tetrazoles
PEG-400
green
medium.
Regarding
electrical
properties
Cu(ii)
complex,
tetra-aza
(N4
donor)
macrocyclic
N-rich
reasonable
-
leading
excellent
capacity
catalyze
these
organic
transformations.
Finally,
high
magnetization
value
(44.92
emu
g-1)
enables
recycling
least
four
times
without
compromising
catalytic
efficiency.
Current Organic Chemistry,
Год журнала:
2024,
Номер
28(2), С. 134 - 160
Опубликована: Янв. 1, 2024
Abstract:
Tetrazole
is
a
most
versatile
pharmacophore
of
which
more
than
twenty
FDAapproved
drugs
have
been
marketed
globally
for
the
management
various
diseases.
In
spite
many
remarkable
and
consistent
efforts
having
made
by
chemists
towards
development
greener
sustainable
strategies
synthesis
tetrazole
derivatives,
this
approach
still
needs
attention.
The
present
review
focuses
on
green
synthetic
preparation
derivatives
from
different
starting
materials
such
as
nitrile,
isonitrile,
carbonyl,
amine,
amide,
oxime
terminal
alkyne
functions.
mechanism
substrates
discussed.
addition
to
this,
four
component
Ugi-azide
reaction
also
described.
Of
note,
articles
exploited
several
water-mediated
solvent-free
methodologies
synthesis.
important
key
features
were
pinpointing
in
each
scheme
provides
excellent
guide
those
searching
selective
procedure
achieve
desired
transformation.
This
seeks
timely
account
(2011-2023)
splendid
array
ecofriendly
procedures
known
today
materials.
rational
enlighten
recent
advancements
substrates.
