ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(43), P. 15935 - 15947
Published: Oct. 17, 2024
4-Propylcatechol
carbonate
is
a
shelf-stable
renewable
C1
transfer
reactant
that
easily
accessible
via
transesterification
of
dimethyl
with
4-propylcatechol
employing
reactive
distillation.
can
be
obtained
from
4-propylguaiacol
and
CO2.
Both
are
industrially
produced
on
the
multiton
scale.
The
former
currently
only
petrochemically
but
expected
to
become
available
large
scale
future
refinery
wood,
based
reductive
catalytic
fractionation.
A
one-pot,
two-step
scalable
synthesis
amides
involving
selective
ring
opening
Grignard
reactants
subsequent
amidation
in
situ-formed
catecholate
ester
intermediate
amines
has
been
developed.
intermediates
allow
fully
controllable
reactivity:
less
comparison
step
high
reactivity
reaction
due
neighboring
group
participation.
No
stoichiometric
reagents
or
catalysts
required.
selectivity
one-pot
process
reflected
purification
process.
In
most
scope
examples,
byproduct
separated
through
simple
extractions,
no
additional
amide
recycled
into
reactant.
ACS Catalysis,
Journal Year:
2025,
Volume and Issue:
15(4), P. 3367 - 3376
Published: Feb. 10, 2025
Hydrodeoxygenation
(HDO)
is
an
effective
method
for
converting
lignin
and
its
derived
phenolic
compounds
to
value-added
aromatic
chemicals
fuels.
Efforts
exploit
molecular
hydrogen
have
been
made
remove
the
hydroxyl
group
in
lignin-derived
make
them
appealing
chemical
industry.
However,
these
processes
rely
on
high
pressure
expensive
catalysts,
presenting
challenges
terms
of
safety,
storage,
cost-effectiveness.
This
highlights
demand
alternatives
under
more
accessible
reaction
conditions.
Herein,
we
present
a
methodology
HDO
phenols
naphthols
using
Pd/C
as
commercial
heterogeneous
catalyst
employing
hydrazine
dual
reagent
reducing
hydrazone
formation.
paper
presents
applicable
substrate
scope
different
including
pharmaceutically
relevant
molecules
such
paracetamol.
Additionally,
highly
challenging
steroid
derivatives,
β-estradiol,
hydrodeoxygenated.
Energy Materials,
Journal Year:
2025,
Volume and Issue:
5(8)
Published: April 21, 2025
Lignin-based
guaiacol
and
its
derivatives
can
be
hydrogenated
to
synthesize
2-methoxycyclohexanols
(2-MCHs),
widely
used
in
the
pharmaceutical
industry,
while
efficient
catalytic
conversion
of
guaiacols
into
2-MCHs
is
challenging
due
interference
side
reaction
CAr-OCH3
bond
cleavage.
In
this
work,
highly
selective
hydrogenation
various
guaiacyl
lignin-derived
phenols
(yields
86%-97%)
was
realized
over
a
single-atom
Ru-based
catalyst
(Ru1/o
-CeO2-ov)
that
preferentially
exposes
CeO2(111)
plane
has
abundant
oxygen
vacancies.
Control
experiments
mechanism
studies
expounded
Ru-O-Ce
active
site
for
aromatic
ring
guaiacols,
exposed
(111)
vacancies
ceria
reduce
activation
energy
hydrogenation,
thereby
enabling
generate
corresponding
products
with
high
selectivity.
Response
surface
optimization
indicated
temperature
time
have
relatively
more
significant
effects
on
2-MCH
yield.
Moreover,
Ru1/o
-CeO2-ov
exhibited
excellent
reusability,
extensively
applicable
hydrogenative
dearomatization
different
types
phenols,
providing
unique
solution
upgrading
biomass
feedstock
specific
structural
chemicals.
Recycling
of
epoxy
composites,
one
the
most
widely
utilized
thermoset
plastics,
is
importance
for
achieving
circular
economy
as
demand
lightweight
materials
in
field
sustainable
technologies
soaring.
Although
catalytic
hydrogenolysis
resins
provides
a
promising
approach
to
recover
valuable
fillers
and
phenolic
compounds
from
there
lack
reusable
heterogeneous
catalyst
this
purpose.
Here,
we
report
robust
Ni−Pd
bimetallic
nanoparticles
supported
on
CeO2
(Ni−Pd/CeO2)
under
mild
conditions
(180
°C,
1
atm
H2).
Mechanistic
studies
revealed
that
Pd-induced
reduction
Ni2+
Ni0
key
high
efficiency
catalyst.
Benefiting
its
nature,
Ni−Pd/CeO2
can
be
easily
recycled
reused
several
times.
The
also
applicable
decomposition
carbon
fiber-reinforced
fibers
bisphenol
A,
indicating
potential
application
our
system
toward
recycling
composites.
