Chemistry - A European Journal,
Journal Year:
2023,
Volume and Issue:
29(49)
Published: June 20, 2023
Benzamide-derived
organochalcogens
(chalcogen=S,
Se,
and
Te)
have
shown
promising
interest
in
biological
synthetic
chemistry.
Ebselen
molecule
derived
from
benzamide
moiety
is
the
most
studied
organoselenium.
However,
its
heavier
congener
organotellurium
under-explored.
Here,
an
efficient
copper-catalyzed
atom
economical
method
has
been
developed
to
synthesize
2-phenyl-benzamide
tellurenyl
iodides
by
inserting
a
tellurium
into
carbon-iodine
bond
of
2-iodobenzamides
one
pot
with
78-95
%
yields.
Further,
Lewis
acidic
nature
Te
center
basic
nitrogen
synthesized
2-Iodo-N-(quinolin-8-yl)benzamide
enabled
them
as
pre-catalyst
for
activation
epoxide
CO2
at
1
atm
preparation
cyclic
carbonates
TOF
TON
values
1447
h-1
4343,
respectively,
under
solvent-free
conditions.
In
addition,
2-iodo-N-(quinolin-8-yl)benzamide
also
used
activating
anilines
form
variety
1,3-diaryl
ureas
up
95
yield.
The
mechanistic
investigation
mitigation
done
125
NMR
HRMS
studies.
It
seems
that
reaction
proceeds
via
formation
catalytically
active
Te-N
heterocycle,
ebtellur
intermediate
which
isolated
structurally
characterized.
Green Chemistry,
Journal Year:
2021,
Volume and Issue:
23(16), P. 5786 - 5796
Published: Jan. 1, 2021
The
direct
synthesis
of
polycarbonate
diols
from
atmospheric
pressure
CO
2
and
α,ω-diols
was
achieved
by
using
a
heterogeneous
CeO
catalyst
flow
semi-bath
reactor.
Green Chemistry,
Journal Year:
2021,
Volume and Issue:
23(6), P. 2487 - 2495
Published: Jan. 1, 2021
A
series
of
biomass-derived
alcohols
were
successfully
vinylated
with
calcium
carbide
followed
by
the
polymerization.
The
polymers
tested
as
materials
and
disassembled
back
to
monomers
through
pyrolysis.
ChemSusChem,
Journal Year:
2022,
Volume and Issue:
15(17)
Published: June 21, 2022
Glycerol
carbonate
(GC)
has
emerged
as
an
attractive
synthetic
target
due
to
various
promising
technological
applications.
Among
several
viable
strategies
produce
GC
from
CO2
and
glycerol
its
derivatives,
the
cycloaddition
of
glycidol
represents
atom-economic
efficient
strategy
that
can
proceed
via
a
halide-free
manifold
through
proton-shuttling
mechanism.
Here,
it
was
shown
synthesis
be
promoted
by
bio-based
readily
available
organic
salts
leading
quantitative
formation
under
atmospheric
pressure
moderate
temperatures.
Comparative
mechanistic
experiments
using
sodium
citrate
most
catalyst
highlighted
role
both
hydrogen
bond
donor
weakly
basic
sites
in
salt
towards
formation.
The
also
used
for
conversion
other
epoxy
alcohols.
Importantly,
discovery
homogeneous
catalyze
reaction
inspired
us
use
metal
alginates
heterogeneous
recoverable
catalysts
same
process.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2022,
Volume and Issue:
10(33), P. 10922 - 10933
Published: Aug. 11, 2022
The
possibility
to
use
glycerol
carbonate
(GlyC)
as
an
innovative
alkylating
agent
for
phenolic
compounds
in
solventless
conditions
and
the
presence
of
a
catalytic
amount
both
homogeneous
heterogeneous
bases
is
herein
described.
In
particular,
peculiar,
polyfunctional
structure
GlyC
allows
one
obtain
formation
not
only
mono-phenoxy-1,2-propanediol
(MPP)
analogue
but
also
1,3-diphenoxy-2-propanol
(DPP),
latter
being
elusive
using
more
traditional,
toxic,
carcinogenic
reagents
such
glycidol
and/or
3-chloro-1,2-propandiol.
production
DPP
indeed
possible
due
situ
reactive
intermediate,
4-(phenoxy)methyl-1,3-dioxolane-2-one
(PhOGlyC),
which
may
undergo
consecutive
nucleophilic
attack
phenolate,
leading
selective
disubstituted
product.
This
reaction
nonetheless
competition
with
PhOGlyC
decarboxylation
that
finally
limits
yield
up
20%,
MPP
roughly
60%
optimized
(atmospheric
pressure,
140
°C,
5
h
Cs2CO3
basic
catalyst)
starting
directly
from
GlyC/phenolic
mixture.
For
this
reason,
multistep
synthetic
strategy
has
been
developed,
first
by
obtaining
quantitative
isolation
intermediate
then
promoting
phenol,
way
66%
after
1
at
170
°C.
obtained
phenyl
glyceryl
ethers
are
interesting
drugs
scaffolds
(i.e.,
guaifenesin,
mephenesin),
intermediates
preparation
active
pharmaceutical
ingredients
(e.g.,
chlorphenesin
carbamate,
methocarbamol),
hydrotropic
solvents;
preliminary
evaluations
biodegradability
alternative
surfactants
have
described
paper.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(24), P. 9255 - 9263
Published: June 6, 2023
Using
greenhouse
gas
CO2
as
the
carbonyl
source,
preparation
of
methyl
propionate
(MP)
via
synergistic
effect
photo-
and
photothermal-catalysis
instead
traditional
thermal
catalysis
ethylene
hydroesterification
was
first
proposed.
Ru-loaded
black
TiO2
(B–TiO2/Ru)
selected
a
photothermal-catalyst
since
Ru
has
been
used
an
excellent
catalyst
for
hydroesterification,
with
high
photothermal
can
reduce
to
more
active
CO
in
reaction
under
light
irradiation.
The
effects
from
B–TiO2/Ru
improve
yield
MP.
A
series
were
successfully
prepared
characterized
by
X-ray
photoelectron
spectroscopy,
transmission
electron
microscopy,
Fourier
transform
infrared,
Raman
diffraction.
For
carbonylation,
higher
oxygen
vacancy
density
lead
efficiency.
mechanism
full-spectrum
Xe
lamp
illumination
over
is
discussed.
Green Chemistry,
Journal Year:
2023,
Volume and Issue:
25(13), P. 4878 - 4911
Published: Jan. 1, 2023
This
review
showcases
the
most
recent
application
of
commercially
relevant
linear
and
alkylene
organic
carbonates
a
representative
enol
ester,
isopropenyl
acetate
(iPAc),
for
chemical
upgrading
renewable-based
compounds
biopolymers.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(10), P. 11168 - 11180
Published: Feb. 28, 2024
Isocyanate,
a
pivotal
chemical
intermediate
to
synthesize
polyurethane
with
widespread
applications
in
household
appliances,
automobiles,
and
construction,
is
predominantly
produced
via
the
phosgene
process,
which
currently
holds
paramount
status
industrial
isocyanate
production.
Nonetheless,
concerns
arise
from
toxicity
of
corrosiveness
hydrogen
chloride,
posing
safety
hazards.
The
synthesis
using
nonphosgene
methods
represents
promising
avenue
for
future
development.
This
article
primarily
focuses
on
approach,
involves
formation
carbamate
through
reaction
nitro-amino
compounds
carbon
monoxide,
dimethyl
carbonate,
urea,
among
other
reagents,
subsequently
leading
thermal
decomposition
get
isocyanate.
paper
emphasizes
progress
catalyst
development
during
process.
Single-component
metal
catalysts,
particularly
zinc,
exhibit
advantages
such
as
high
activity,
cost-effectiveness,
compatibility
wide
range
substrates.
Composite
catalysts
enhance
yield
by
introducing
second
component
adjust
active
composition.
central
research
direction
aims
optimize
adaptation
conditions,
including
temperature,
pressure,
time,
solvent,
achieve
raw
material
conversion
product
yield.