Royal Society of Chemistry eBooks,
Journal Year:
2024,
Volume and Issue:
unknown, P. 117 - 149
Published: Dec. 6, 2024
This
chapter
provides
a
comprehensive
overview
of
recent
advancements
in
Mn(i)-catalysed
hydrogenation
and
dehydrogenation
reactions,
with
focus
on
their
application
hydrogen
storage
systems.
It
explores
the
reactivity
Mn(i)
complexes
formate
analogues,
as
well
catalytic
mechanisms,
highlighting
potential
these
catalysts
to
contribute
circular
carbon
economy.
The
investigates
use
carbonate
hydroxide
salts
amines
environmentally
friendly
materials
for
storage,
demonstrating
substantial
efficiency
high
evolution
yield
excellent
reloading
purity.
systems’
operation
below
100
°C
suggests
possibility
waste
heat
management
integration
into
process.
also
discusses
challenges
limitations
encountered,
such
decreased
subsequent
cycles
solubility
issues
certain
CO2
absorbents.
Overall,
presents
promising
candidates
renewable
energy
applications,
offering
insights
current
future
perspectives
development
efficient,
affordable,
sustainable
technologies.
The Journal of Organic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 9, 2025
Amino
compounds
are
important
molecules,
commonly
found
in
nature
and
widely
applied
industrial
production.
Recently,
photocatalysis
has
been
discovered
as
an
efficient
method
to
synthesize
amino
by
promoting
imine
hydrogenation.
In
this
work,
a
strategy
of
hydrogenation
catalyzed
2e–
consecutive
photoinduced
electron
transfer
(ConPET)
process
thioxanthone-TfOH
complex
(9-HTXTF)
was
thoroughly
investigated
with
its
reaction
conditions
optimized,
substrate
scope
examined,
mechanism
elucidated,
which
provides
for
synthesizing
compounds.
Herein,
we
introduce
an
efficient
catalytic
transfer
hydrogenation
method
using
inexpensive,
environmentally
friendly,
and
readily
available
isopropyl
alcohol
as
a
hydrogen
donor
for
selectively
reducing
diverse
nitroarenes.
The
process
employs
cobalt-based
nanocatalyst
(Co–N/Al2O3),
synthesized
via
simple
impregnation
cobalt
nitrate,
1,10-phenanthroline,
γ-Al2O3
precursors.
This
proves
highly
effective
in
producing
wide
range
of
aryl
amines
(35
examples),
pharmaceutical
intermediates
(4
late-stage
functional
group
transformations
(1
example),
with
yields
ranging
from
moderate
to
excellent
(70–98%)
across
various
scales.
catalyst
was
characterized
HR-TEM,
powder
XRD,
XPS,
H2-TPR,
N2
adsorption–desorption,
Raman
spectroscopy,
ICP-OES
techniques.
These
analyses
confirmed
the
formation
Co3O4
nanoparticles.
exceptional
performance
Co–N/Al2O3
is
attributed
its
optimized
textural,
morphological,
acidic
properties,
which
are
superior
other
catalysts.
Mechanistic
studies
provided
insights
into
formed
during
different
stages
reaction
indirect
route
(condensation
mechanism).
recyclability
were
validated
through
experimental
testing,
demonstrating
consistent
efficiency
over
three
consecutive
cycles.
sustainable
offers
promising
alternative
conventional
processes
that
use
molecular
hydrogen.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(9), P. 6413 - 6422
Published: April 11, 2024
Iridium
complexes
have
been
demonstrated
to
be
highly
active
catalysts
for
a
wide
variety
of
transformations.
Their
unique
photophysical
and
photochemical
properties
render
them
as
one
the
most
established
photocatalysts.
Moreover,
iridium
are
widely
acknowledged
their
efficiency
in
transfer
hydrogenation
reactions.
However,
development
able
promote
both
traditional
organometallic
catalysis
photocatalysis
is
scarce.
Thus,
design
iridium-based
still
an
area
research.
In
this
context,
we
targeted
synthesis
family
Ir-Cp*
systems
explore
(photo)catalytic
applications.
Here,
describe
synthesis,
structural
characterization,
formula
[IrCp*Cl(N^O)].
These
applied
with
double
catalytic
function,
carbonyl
reduction
different
photomediated
ChemistrySelect,
Journal Year:
2024,
Volume and Issue:
9(19)
Published: May 16, 2024
Abstract
An
efficient
and
versatile
synthesis
of
alcohols
via
transfer
hydrogenation
from
ketones
with
isopropanol,
utilizing
[Ni(6,6′‐(OH)
2
‐2,2′‐bpy)][Br
]
under
alkaline
conditions,
has
been
documented.
It
was
noteworthy
that
many
readily
reducible
or
labile
functional
groups
such
as
nitro,
cyano,
halide,
within
the
same
molecular
framework,
did
not
undergo
any
change
standard
reaction
conditions.
Furthermore,
gram
scale
successfully
carried
out
good
yield
using
a
common
route
only
single
purification
by
column
chromatography.
Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
42(23), P. 3047 - 3055
Published: July 30, 2024
Comprehensive
Summary
The
reductive
lactonization
strategy
provides
an
efficient
access
to
diastereoenriched
polycyclic
γ‐lactones.
However,
it
is
still
a
formidable
challenge
develop
and
versatile
protocol
with
excellent
levels
of
diastereocontrol.
Herein,
we
provide
highly
diastereoselective
route
diastereopure
bi‐
γ‐lactones,
by
means
iridium‐catalyzed
hydride
transfer
strategy.
This
method
features
high
diastereocontrol,
broad
substrate
scope,
catalyst
efficiency
(
S
/
C
=
up
5000).
Mechanistic
studies
suggest
that
the
iridium
formation
might
be
rate‐determining
step,
step
diastereo‐determining
step.
large
steric
hindrance
species
intramolecular
hydrogen
bonding
are
critically
key
diastereocontrol
process.
From
perspectives
configurational
analysis
Duniz
angles
attack,
nature
well
rationalized.
A
more
general
empirical
rule
based
on
facial
selectivity
for
explaining
predicting
stereochemistry
also
proposed.
Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
53(5)
Published: May 1, 2024
Abstract
We
have
developed
a
transfer
hydrogenation
of
aldehydes
and
ketones
with
B2(OH)4
as
reductant
amphiphilic
resin-dispersed
palladium
nanoparticles
catalyst
system
in
an
aqueous
medium,
where
water
also
serves
hydrogen
donor.
A
variety
ketones,
including
aliphatic
carbonyl
compounds,
reacted
to
give
the
corresponding
primary
secondary
alcohols,
respectively.
The
was
recovered
by
filtration
reused
9
times
without
significant
loss
its
catalytic
activity.
