ACS Applied Polymer Materials,
Год журнала:
2022,
Номер
5(1), С. 700 - 710
Опубликована: Дек. 29, 2022
A
metallopolymer,
Ru(p-cymene)@poly(2,2′-BiBzlm),
which
is
synthesized
by
the
incorporation
of
[Ru(p-cymene)Cl]2
into
poly(bibenzimidazoles),
was
proven
to
be
a
general
and
efficient
catalyst
for
redox
isomerization
allylic
alcohols
ketones.
Mechanistic
experiments
showed
that
this
reaction
in
agreement
with
an
intramolecular
hydrogen
shift.
This
also
applied
gram-scale
synthesis
biologically
active
molecule.
Furthermore,
could
recycled
five
times
without
obvious
decrease
activity.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(13)
Опубликована: Фев. 1, 2024
Abstract
The
synthesis
of
mono‐
N
‐methylated
aliphatic
primary
amines
has
traditionally
been
challenging,
requiring
noble
metal
catalysts
and
high‐pressure
H
2
for
achieving
satisfactory
yields
selectivity.
Herein,
we
developed
an
approach
the
selective
coupling
methanol
amines,
without
hydrogen,
using
a
manganese‐based
catalyst.
Remarkably,
up
to
98
%
with
broad
substrate
scope
were
achieved
at
low
catalyst
loadings.
Notably,
due
weak
base‐catalyzed
alcoholysis
formamide
intermediates,
our
novel
protocol
not
only
obviates
addition
but
also
prevents
side
secondary
‐methylation,
supported
by
control
experiments
density
functional
theory
calculations.
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(4), С. 1828 - 1839
Опубликована: Янв. 12, 2024
Single-component
catalysts
with
integrated
multiple
reactive
centers
could
work
in
concert
to
achieve
enhanced
activity
tailored
for
specific
catalytic
reactions,
but
they
remain
underdeveloped.
Herein,
we
report
the
construction
of
heterogeneous
bimetallic
porous
coordination
polymers
(PCPs)
containing
both
porphyrin
and
ACS Catalysis,
Год журнала:
2022,
Номер
12(7), С. 3995 - 4001
Опубликована: Март 15, 2022
Conversion
of
readily
available
feedstocks
to
valuable
platform
chemicals
via
an
eco-friendly
catalytic
pathway
has
always
been
one
the
key
focuses
synthetic
chemists.
In
this
context,
herein,
we
report
selective
transformation
feedstock,
vicinal
glycols,
value-added
α-hydroxycarboxylic
acid
molecules
that
are
prevalent
in
bioactive
and
biodegradable
polymers.
A
bench
stable
Earth-abundant
metal
complex,
{[HN(C2H4PPh2)2]Mn(CO)2Br},
Mn-I
catalyzed
reformation
reaction
at
low
temperature
high
selectivity
with
a
turnover
number
reaching
2400,
surpassing
previously
used
homogeneous
catalysts
for
such
reaction.
Hydrogen
gas
is
evolved
as
byproduct
without
needing
acceptor.
The
developed
protocol
applicable
both
aromatic
aliphatic
delivering
α-substituted
hydroxycarboxylic
acids
yields
selectivities.
Detailed
mechanistic
studies
elucidated
involvements
different
manganese(I)-species
during
acceptorless
dehydrogenation
catalysis.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(10)
Опубликована: Янв. 11, 2023
Herein,
we
report
a
straightforward
synthesis
of
valuable
α-hydroxycarboxylic
acid
molecules
via
an
acceptorless
dehydrogenative
coupling
ethylene
glycol
and
primary
alcohols.
A
bench-stable
manganese
complex
catalyzed
the
reaction,
which
is
scalable,
with
product
being
isolated
high
yields
selectivities
under
mild
conditions.
The
protocol
environmentally
benign,
producing
water
hydrogen
gas
as
only
byproducts.
Methanol
can
also
be
used
C1
source
for
platform
molecule
lactic
acid,
turnover
>104
.
methodology
was
to
functionalize
alcohols
derived
from
natural
products
fatty
acids.
Furthermore,
it
applied
synthesizing
α-amino
α-thiocarboxylic
several
drugs
bioactive
molecules,
including
endogenous
metabolites,
Danshensu,
Enalapril,
Lisinopril,
Rosmarinic
acid.
Preliminary
mechanistic
studies
were
performed
shed
light
on
mechanism
involved
in
reaction.
The Journal of Physical Chemistry A,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 17, 2025
Understanding
the
interactions
between
transition
metal
atoms
and
molecules
is
important
for
study
of
various
related
chemical
physical
processes.
In
this
study,
we
have
investigated
collisions
iron
(Fe),
iridium
(Ir),
platinum
(Pt)
small
CH4,
O2,
CO2
using
a
crossed-beam
time-sliced
ion
velocity
map
imaging
technique.
Elastic
were
observed
in
all
cases,
except
Pt
with
O2
CO2.
Collisions
Fe
or
Ir
show
mainly
long-range
attractive
potentials
at
large
impact
parameters
leading
to
forward
scattering,
whereas
sideways
backward
scatterings
indicate
formation
short-lived
complexes
lifetimes
comparable
their
rotational
periods.
CO2,
may
react
gases
become
chemically
bound
them,
which
can
deplete
nonreactive
scattering
signal.
The
insights
gained
from
provide
foundation
improved
understanding
complex
transitional
other
molecules.
