Catalysis Communications,
Год журнала:
2023,
Номер
182, С. 106755 - 106755
Опубликована: Авг. 28, 2023
A
facile,
efficient
and
environmentally-friendly
method
for
the
synthesis
of
2-amino-4H-chromenes
via
multicomponent
reaction
in
presence
modified
multiwalled
carbon
nanotubes
(MWCNTs/CONHBu)
as
a
green
reusable
solid
base
catalysts
is
presented.
All
products
were
synthesized
short
times
with
high
to
excellent
yields
under
conditions
identified
using
FTIR
1H
NMR
techniques.
The
remarkable
aspects
this
are
including
mild
conditions,
simple
workup,
heterogeneous
catalyst,
process,
yield
products.
catalyst
was
characterized
SEM,
XRD,
TEM,
Raman
FT-IR
spectroscopy.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(19), С. 7515 - 7525
Опубликована: Май 1, 2023
Furfurylamine
(FLA)
is
widely
utilized
in
manufacturing
polymers,
food
additives,
fibers,
fuel
flavors,
and
pharmaceuticals.
Lignocellulose
was
tandemly
transformed
to
furfurylamine
by
combining
chemocatalysis
with
biocatalysis
a
three-component
deep
eutectic
solvent
(3c-DES)–H2O
this
work.
Biomass-derived
d-xylose
(300
mM)
3c-DES
ChCl/MA/LA
(15
wt
%)
[choline
chloride
(ChCl),
malonic
acid
(MA),
lactic
(LA)]
at
190
°C
for
45
min
produce
furfural
(70.6%
yield).
A
robust
triple
mutant
Aspergillus
terreus
ω-transaminase
HNILQE
high
biocatalytic
activity
thermostability
obtained
through
consensus
strategy
[Q97E
(glutamine
glutamic
acid),
H210N
(histidine
asparagine),
I77L
(isoleucine
leucine)].
could
aminate
d-xylose-derived
(97.6%
yield),
reaching
productivity
of
0.98
g
furfurylamine/g
(cal.
0.44
d-xylose).
High
titer
biobased
(500
FLA
(95.8%
yield,
>99%
selectivity)
ChCl/MA/LA–H2O.
highly
efficient
manufacture
from
loading
biocatalyst
successfully
realized
the
established
eco-friendly
medium.
This
chemoenzymatic
process
can
be
furans
green
sustainable
approach.
Abstract
Multicomponent
reactions
are
crucial
for
operating
organic
synthesis.
In
today's
world,
chemists
concentrate
on
greener
methodologies
that
cater
to
rising
environmental
concerns.
Most
conventional
solvents
harsh
the
environment,
which
can
be
addressed
by
environmentally
and
pocket‐friendly
Deep
eutectic
(DES).
Organic
synthesis
via
MCR
in
presence
of
DES
has
resulted
blend
green
methodology
solvent
transformations.
Forasmuch
as
addressing
concerns
developing
higher
heterocycles,
our
review
focuses
literature
published
DES‐mediated
N
‐Heterocyclic
compounds.
Molecules,
Год журнала:
2024,
Номер
29(13), С. 3089 - 3089
Опубликована: Июнь 28, 2024
Deep
eutectic
solvents
(DESs)
have
emerged
as
a
greener
alternative
to
other
more
polluting
traditional
and
attracted
lot
of
interest
in
the
last
two
decades.
The
DESs
are
less
toxic
dissolvents
lower
environmental
footprint.
This
paper
presents
an
synthesis
method
classical
heating–stirring
method.
ultrasound
is
one
most
promising
methods
for
terms
yield
energy
efficiency.
Therefore,
was
studied
obtain
hydrophobic
(Aliquat
336:L-Menthol
(3:7);
Lidocaine:Decanoic
acid
(1:2))
hydrophilic
based
on
choline
chloride,
urea,
ethylene
glycol
oxalic
acid.
physical
characterization
via
comparison
Fourier
transform
infrared
(FTIR)
spectra
showed
no
difference
between
obtained
by
methods.
study
all
prepared
were
carried
out
nuclear
magnetic
resonance
spectroscopy
(NMR).
density
viscosity
properties
evaluated.
values
similar
both
However,
differences
detected
due
presence
some
water
hygroscopic
DESs.
Polymer Engineering and Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 5, 2025
Abstract
This
study
aims
to
investigate
the
performance
of
deep
eutectic
solvents
(DESs)
as
plasticizers
in
low‐density
polyethylene
(LDPE)
films
and
compare
them
with
di(2‐ethylhexyl)
phthalate
(DEHP).
DESs
were
produced
by
mixing
choline
chloride
lactic
acid
urea
1:1
1:2
molar
ratios.
The
prepared
added
LDPE
at
two
different
ratios
(10%
30%),
10
compositions
extrusion
method.
densities,
viscosities,
pH,
volatility,
thermal
values
determined
between
1.14
1.18
g/cm
3
,
22
99
mPa.s,
0.05
9.02,
0.7%
18.9%,
<−70
63°C,
respectively.
When
examined
terms
their
bond
structure,
it
was
observed
that
they
could
be
successfully.
DES
characterized
thickness,
mechanical,
barrier,
optical,
DSC,
FTIR,
SEM,
water
behavior
properties,
heat
sealability,
overall
migration
(OM)
properties.
According
results
some
basic
analyses
performed
on
films,
first
three
best
properties
(CL1:30,
CL2:30,
DEHP:30)
using
TOPSIS
from
multi‐criteria
decision
hierarchy
techniques.
It
most
suitable
had
better
than
control
DEHP
tensile
strength
(10–12
MPa),
elongation
break
(500%–545%),
vapor
permeance
(0.03–0.04
g/m
2
/h/kPa),
oxygen
transmission
rate
(13–14
cm
/m
/day),
contact
angle
(>99°),
UV
light
barrier
analyses.
did
not
cause
any
change
DSC
OM
films.
In
general,
important
obtained
regarding
use
effective
Highlights
is
a
sustainable
alternative
for
plasticization.
DES‐plasticized
showed
400%
performance.
25%
80%
barriers.
have
superior
hydrophobic
affect
stability
or
OM.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Март 3, 2025
A
novel
deep
eutectic
solvent
(ChCl/HGA-DES)
was
prepared
by
a
mixture
of
two
moles
choline
chloride
(ChCl)
and
one
mole
2,3-dihydroxybenzoic
acid
(hypogallic
acid,
HGA).
The
point
phase
diagram
showed
that
the
ChCl
HGA
is
best
molar
ratio
for
synthesizing
DES.
Then,
ChCl/HGA-DES
characterized
FT-IR,
TGA/DTA,
densitometer,
points,
1HNMR
techniques
used
as
capable
catalyst
green
synthesis
six
new
benzo[4,5]thiazolo[3,2-a]-
chromeno[4,3-d]pyrimidin-6-ones
5(a-f)
five
(2-(2-hydroxyphenyl)-8-methyl-4-phenyl-4H-benzo[4,5]thiazolo[3,2-a]pyrimidin-3-yl)(morpholino)methanones
6(a-e)
through
one-pot
condensation
reactions.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2022,
Номер
10(37), С. 12165 - 12176
Опубликована: Сен. 6, 2022
Biobased
2,5-bis(hydroxymethyl)furan
is
a
versatile
building
block
for
the
production
of
drugs,
polymers,
crown
ethers,
bioactive
compounds,
and
value-added
intermediates.
To
explore
more
efficient
route
to
synthesize
2,5-bis(hydroxymethyl)furan,
tandem
transformation
by
quick
dehydration
with
deep
eutectic
solvent
betaine:benzenesulfonic
acid
(Bet:BSA)
mild
bioreduction
recombinant
Escherichia
coli
(E.
coli)
DCF
was
developed
converting
d-fructose
into
2,5-bis(hydroxymethyl)furan.
The
5-hydroxymethylfurfural
yield
reached
62.3
±
1.6%
(based
on
d-fructose)
in
Bet:BSA
at
120
°C
after
short
time
(2
min).
d-Fructose-valorized
biologically
transformed
newly
constructed
E.
containing
reductase
formate
dehydrogenase
40
pH
7.5
48
h,
99.6
0.1%
5-hydroxymethylfurfural)
Bet:BSA-water
cosubstrate
HCOONa
(5-HMF-to-HCOONa
molar
ratio,
1:2.5).
Meanwhile,
150
mM
commercial
94.4
0.9%.
An
hybrid
process
valorize
Bet:BSA-water,
which
has
good
industrial
application
potential.
RSC Sustainability,
Год журнала:
2024,
Номер
2(3), С. 578 - 607
Опубликована: Янв. 1, 2024
Journeying
towards
inherently
sustainable
and
green
synthetic
chemistry.
Commitment
to
change
(re)design
of
practices,
processes
goals,
through
reflection,
awareness
education.
