Green Chemistry in Organic Synthesis: Recent Update on Green Catalytic Approaches in Synthesis of 1,2,4-Thiadiazoles
Catalysts,
Год журнала:
2022,
Номер
12(11), С. 1329 - 1329
Опубликована: Окт. 29, 2022
Green
(sustainable)
chemistry
provides
a
framework
for
chemists,
pharmacists,
medicinal
chemists
and
chemical
engineers
to
design
processes,
protocols
synthetic
methodologies
make
their
contribution
the
broad
spectrum
of
global
sustainability.
conditions,
especially
catalysis,
are
pillar
green
chemistry.
principles
help
overcome
problems
conventional
synthesis,
such
as
slow
reaction
rates,
unhealthy
solvents
catalysts
long
duration
completion
time,
envision
solutions
by
developing
environmentally
benign
catalysts,
solvents,
use
microwave
ultrasonic
radiations,
solvent-free,
grinding
chemo-mechanical
approaches.
1,2,4-thiadiazole
is
privileged
structural
motif
that
belongs
class
nitrogen–sulfur-containing
heterocycles
with
diverse
pharmaceutical
applications.
This
comprehensive
review
systemizes
types
ideal
organic
synthesis
characteristics
approaches,
irradiation,
ultrasound,
ionic
liquids,
metal-free
heterogeneous
catalysis
construct
different
1,2,4-thiadiazoles
scaffolds.
Язык: Английский
Ionic Liquids: Advances and Applications in Phase Transfer Catalysis
Catalysts,
Год журнала:
2023,
Номер
13(3), С. 474 - 474
Опубликована: Фев. 25, 2023
Ionic
liquids
are
a
family
of
that
composed
entirely
ions
and
usually
have
melting
points
lower
than
100
°C.
Extensive
research,
along
with
the
ever-growing
interest
scientific
community,
allowed
for
development
multitude
ionic
low
points.
Such
compounds
considered
neoteric
materials
as
well
ideal,
custom-made
solvents
variety
different
chemical
transformations.
In
this
regard,
importance
phase
transfer
catalysis
is
evident
in
diversity
substrates
reactions.
The
use
catalysts
allows
reaction
to
proceed,
facilitating
otherwise
insoluble
reactants
desired
phase.
Recent
advances
led
emergence
liquids,
which
excellent
candidates
catalysts.
inherent
fine-tuning
capability
these
molecules,
potential
catalytic
reactions,
epitomize
sustainable
aspect
field
research.
Herein,
cohesive
report
such
applications
will
be
presented,
including
period
from
last
decade
20th
century
up
date.
Язык: Английский
A New 2-Aminospiropyrazolylammonium Cation with Possible Uses in the Topical Areas of Ionic Liquids
Molecules,
Год журнала:
2024,
Номер
29(10), С. 2326 - 2326
Опубликована: Май 15, 2024
Based
on
the
fact
that
2-aminospiropyrazolinium
compounds
and
structurally
related
azoniaspiro
belong,
in
a
broad
sense,
to
class
of
ionic
liquids,
we
have
reviewed
them
studied
their
practical
applications.
To
search
for
possible
uses
new
compounds,
it
is
necessary
undertake
comparison
with
based
available
information.
The
structures
well-studied
but
little-studied
rigid
frameworks,
limited
conformational
freedom,
salt
nature.
These
properties
give
ability
organize
nearby
molecular
space
enable
structure-forming
synthesis
zeolites,
as
well
act
phase-transfer
catalysts
selective
biological
effects.
Additionally,
these
characteristics
electrolytes
serve
materials
anion
exchange
membranes
fuel
cells
water
electrolyzers.
Thus,
catalysts,
structure-directing
agents,
electrolytes,
power
sources
would
encourage
study
similar
which
relation
vitro
antitubercular,
antidiabetic,
antimicrobial
activities.
Язык: Английский
Reusable Glucose-Based Crown Ethers Anchored to PVC
Molecules,
Год журнала:
2023,
Номер
28(23), С. 7905 - 7905
Опубликована: Дек. 2, 2023
The
recovery
and
reuse
of
the
enantioselective
catalysts
produced
by
tedious
work
are
important
not
only
from
perspective
green
chemistry,
but
also
point
view
productivity.
Some
carbohydrate-based
crown
ethers
prepared
in
our
research
group
were
able
to
generate
significant
asymmetric
induction
certain
cases.
However,
they
recoverable
after
synthesis.
Therefore,
we
modified
most
effective
structure
with
a
propargyl
so
that
it
can
be
attached
polymer
an
azide-alkyne
reaction.
It
was
investigated
whether
position
bonding
affects
activity
ethers,
hence,
introduced
either
side
chain,
anomeric
center
or
benzylidene
protecting
group.
To
anchor
macrocycles,
low
molecular
weight
PVC
azide
groups
4%
10%,
respectively.
found
glucose-based
ether
bearing
on
unit
grafted
has
highest
regarding
enantioselectivity
(77%
ee).
catalyst
Michael
addition
diethyl
acetamidomalonate
nitrostyrene
could
reused
five
times
without
loss
enantioselectivity.
Язык: Английский
Synthesis, Characterization, DFT Studies of Novel Phase Transfer Catalyst and Application in O-Propargylation Reaction
Asian Journal of Chemistry,
Год журнала:
2023,
Номер
35(4), С. 929 - 934
Опубликована: Янв. 1, 2023
The
present
work
reports
the
synthesis
and
characterization
of
1-benzyl-1,4-
diazoniabicyclo[2.2.1]hepta-2,4(7)-diene
dibromide
for
phase
transfer
catalyst
(PTC)
applications.
derived
quaternary
salt
was
characterized
by
UV,
FTIR
NMR
spectral
techniques.
structure
has
been
optimized
density
functional
theory
(DFT)
in
water
diethyl
ether
solvation
conditions.
DFT
outcomes
showed
good
chemical
potential
compound
between
2.15
eV
6.8
both
media.
Extended
research
examined
nature
adjusting
dosage,
temperature
solvents
O-propargylation
reaction
under
normal
conditions
useful
precursor
synthesis.
kinetic
data
revealed
that
novel
bisite
amine
bromide
effective
a
variety
chlorobenzene
biphasic
system
yielded
88%
bioactive
molecule
when
compare
to
other
immiscible
systems.
Язык: Английский