Applied Organometallic Chemistry,
Journal Year:
2023,
Volume and Issue:
37(7)
Published: April 26, 2023
The
sustainable
and
environmentally
benign
biogenic
synthesis
of
manganese‐oxide
nanoparticles
(MnO
2
NPs)
in
a
single
crystalline
δ
‐phase
its
subsequent
synthetic
utility
have
been
described.
synthesized
‐MnO
NPs
were
characterized
using
scanning
electron
microscopy
(SEM),
energy
dispersive
X‐ray
(EDX),
diffraction
(XRD)
analysis
techniques.
detailed
envisages
the
reduction
Mn(VII)
to
Mn(IV)
was
facilitated
by
various
phytochemicals
present
aq.
mango
leaves
extract,
avoiding
use
external
ligand
source.
perceived
delta
(
)
monoclinic
phase,
wherein
spherical
agglomerated
morphology
displayed
with
particle
size
<5
nm.
Further,
newly
developed
showcased
for
alpha‐keto‐alkylation
quinoline
via
hydrogen
autotransfer
acceptorless
dehydrogenative
coupling
strategy.
Moreover,
series
control
experiments,
mechanistic
elucidation,
catalyst
recyclability,
dye
removal
study
demonstrated.
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(11), P. 4386 - 4464
Published: Jan. 1, 2022
The
emerging
field
of
organometallic
catalysis
has
shifted
towards
research
on
Earth-abundant
transition
metals
due
to
their
ready
availability,
economic
advantage,
and
novel
properties.
In
this
case,
manganese,
the
third
most
abundant
transition-metal
in
Earth's
crust,
emerged
as
one
leading
competitors.
Accordingly,
a
large
number
molecularly-defined
Mn-complexes
been
synthesized
employed
for
hydrogenation,
dehydrogenation,
hydroelementation
reactions.
regard,
catalyst
design
is
based
three
pillars,
namely,
metal-ligand
bifunctionality,
ligand
hemilability,
redox
activity.
Indeed,
developed
catalysts
not
only
differ
chelating
atoms
they
possess
but
also
working
principles,
thereby
different
turnover
numbers
product
molecules.
Hence,
critical
assessment
molecularly
defined
manganese
terms
atoms,
reaction
conditions,
mechanistic
pathway,
significant.
Herein,
we
analyze
complexes
catalytic
activity,
versatility
allow
multiple
transformations
routes
convert
substrates
target
This
article
will
be
helpful
get
significant
insight
into
design,
aiding
design.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(1), P. 215 - 220
Published: Oct. 25, 2019
Highly
selective
β-methylation
of
alcohols
was
achieved
using
an
earth-abundant
first
row
transition
metal
in
the
air
stable
molecular
manganese
complex
[Mn(CO)
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(4), P. 1485 - 1490
Published: Nov. 19, 2019
Abstract
We
report
an
earth‐abundant‐metal‐catalyzed
double
and
single
methylation
of
alcohols.
A
manganese
catalyst,
which
operates
at
low
catalyst
loadings
short
reaction
times,
mediates
these
reactions
efficiently.
broad
scope
primary
secondary
alcohols,
including
purely
aliphatic
examples,
1,2‐aminoalcohols
can
be
methylated.
Furthermore,
alcohol
for
the
synthesis
pharmaceuticals
has
been
demonstrated.
The
system
tolerates
many
functional
groups
among
them
hydrogenation‐sensitive
examples
upscaling
is
easily
achieved.
Mechanistic
investigations
are
indicative
a
borrowing
hydrogen
or
autotransfer
mechanism
involving
bimetallic
K‐Mn
catalyst.
accepts
as
proton
hydride
from
alcohols
efficiently
reacts
with
chalcone
via
transfer.
Organic Letters,
Journal Year:
2020,
Volume and Issue:
22(15), P. 6067 - 6071
Published: July 28, 2020
The
first
base
metal-catalyzed
transfer
hydrogenation
of
alkynes
with
methanol
is
described.
An
air
and
moisture
stable
manganese
pincer
complex
catalyzes
the
reduction
a
variety
different
to
corresponding
(Z)-olefins
in
high
yields.
reaction
stereo-
chemoselective
scalable.
Organic Letters,
Journal Year:
2021,
Volume and Issue:
23(7), P. 2742 - 2747
Published: March 23, 2021
The
reduction
of
nitroarenes
to
anilines
as
well
azobenzenes
hydrazobenzenes
using
a
single
base-metal
catalyst
is
reported.
hydrogenation
reactions
are
performed
with
an
air-and
moisture-stable
manganese
and
proceed
under
relatively
mild
reaction
conditions.
transformation
tolerates
broad
range
functional
groups,
affording
aniline
derivatives
in
high
yields.
Mechanistic
studies
suggest
that
the
proceeds
via
bifunctional
activation
involving
metal–ligand
cooperative
catalysis.
Chemical Communications,
Journal Year:
2021,
Volume and Issue:
57(69), P. 8534 - 8549
Published: Jan. 1, 2021
Manganese
catalyzed
hydrogen
transfer
reactions
enabled
net
reductions
and
cascade
CC-
CN-bond
formation
reactions.
The
success
is
aided
by
multifunctional
ligand
design
namely
metal–ligand
bifunctionality,
hemilability,
redox
non-innocence.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Aug. 15, 2024
A
single-atom
catalyst
with
generally
regarded
inert
Zn–N4
motifs
derived
from
ZIF-8
is
unexpectedly
efficient
for
the
activation
of
alcohols,
enabling
alcohol-mediated
alkylation
and
transfer
hydrogenation.
C-alkylation
nitriles,
ketones,
N-heterocycles,
amides,
keto
acids,
esters,
N-alkylation
amines
amides
all
go
smoothly
developed
method.
Taking
α-alkylation
nitriles
alcohols
as
an
example,
starts
(1)
nitrogen-doped
carbon
support
catalyzed
dehydrogenation
into
aldehydes,
which
further
condensed
to
give
vinyl
followed
by
(2)
hydrogenation
C=C
bonds
in
on
sites.
The
experimental
results
DFT
calculations
reveal
that
Lewis
acidic
Zn-N4
sites
promote
step
activating
alcohols.
This
first
example
highly
catalysts
various
organic
transformations
biomass-derived
alkylating
reagents
hydrogen
donors.
Using
carbonyl
compounds
or
synthesis
α-alkylated
appealing
a
sustainability
perspective.
Here,
acting
acid
effectively
activates
thus
promoting
reactions
using
both
