ACS Applied Nano Materials,
Год журнала:
2023,
Номер
unknown
Опубликована: Дек. 27, 2023
Drugs
emerge
in
an
endless
stream;
the
global
drug
supply
is
increasing,
and
number
of
users
steadily
rising,
so
detection
acetic
anhydride,
a
raw
material
for
preparation,
great
significance
controlling
spread
drugs.
The
crystal
phase
semiconductor
metal
oxides
has
important
impact
on
oxygen
vacancy,
microscopic
morphology,
specific
surface
area,
high-energy
exposure,
which
turn
affect
catalytic
gas-sensing
effects
materials.
Ion
doping
can
sometimes
achieve
purpose
changing
phase.
In
this
study,
Cd-doped
biphase
(cubic
hexagonal
phase)
In2O3
nanospheres
sensitive
to
anhydride
were
synthesized
via
one
easy
hydrothermal
process
proportion
cubic
controlled
by
amount
Cd
element.
ion-doped
structure
save
consumption
expensive
metals
provide
heterojunction
as
well
more
vacancy
enhance
gas
sensing
properties.
fabricated
sensors
not
only
have
high
sensitivity
(372)
100
ppm
dry
environment
220
°C
but
also
keep
excellent
selectivity
good
stability.
X-ray
diffraction
(XRD),
energy
dispersive
spectroscopy
(EDS)
analysis,
scanning
electron
microscopy
(SEM),
photoelectron
(XPS)
used
observe
phase,
elemental
information,
nanoscale
appearance,
existing
state
elements
prepared
compounds.
gas-sensitive
mechanism
was
briefly
analyzed
according
characterization
information.
enhancing
properties
are
owing
change
internal
electronic
channels,
abundant
caused
doping.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(12), С. 7971 - 7978
Опубликована: Март 14, 2024
We
describe
a
nickel-catalyzed
carbonylative
cross-coupling
of
unactivated
secondary
alkyl
electrophiles
with
the
organozinc
reagent
at
atmospheric
CO
gas,
thus
allowing
expedient
construction
unsymmetric
dialkyl
ketones
broad
functional
group
tolerance.
The
leverage
newly
developed
Green Synthesis and Catalysis,
Год журнала:
2024,
Номер
5(4), С. 211 - 269
Опубликована: Май 6, 2024
The
development
of
catalytic
carbonylation
reactions
has
increased
considerably.
Although
many
reviews/chapters/books
on
have
been
published,
summaries
cheap
metal-catalyzed
aryl
halides
and
other
chemical
bonds
with
high
dissociation
energy
C-Y
(Y
=
O,
N,
H)
are
still
very
rare.
Focusing
green
sustainable
chemistry,
this
review
summarizes
discusses
the
achievements
carbonylative
transformations
(C(sp2)-X)
strong
based
non-expensive
metal
catalysts
(Co,
Mn,
Mo,
Ni,
Fe,
Cu),
photochemical
electrochemical
systems
developed
in
recent
decades.
ACS Catalysis,
Год журнала:
2024,
Номер
14(16), С. 11974 - 11989
Опубликована: Июль 26, 2024
Photoactive
copper
complexes
have
gained
significant
attention
due
to
their
photocatalytic
activities.
Different
homogeneous
Cu(I)
complexes,
Cu(II)
and
heterogeneous
copper-based
photocatalysts
been
investigated
utilized
in
a
broad
spectrum
of
organic
transformations.
These
applications
span
radical
additions,
C–C
bond
C–heteroatom
cross-couplings,
aerobic
oxidative
reactions,
kinetic
resolutions.
This
review
summarizes
the
advancements
this
dynamic
field
visible-light-induced,
excited-state
copper-catalyzed
reactions
over
recent
years.
It
is
organized
according
type
excited
species
involved
provides
perspective
on
current
future
developments.
Chinese Journal of Chemistry,
Год журнала:
2023,
Номер
41(23), С. 3419 - 3432
Опубликована: Июль 27, 2023
Comprehensive
Summary
Transition
metal‐catalyzed
carbonylation
reactions
represent
a
direct
and
atom‐economical
approach
to
synthesize
carbonyl
compounds
or
their
derivatives
by
using
CO
as
cheap
readily
available
C1
feedstock.
While
of
C(sp
2
)‐hybridized
electrophiles
(
e.g
.,
aryl
halides)
is
well
developed,
less
reactive
unactivated
alkyl
remains
challenging.
Recently,
the
use
earth‐abundant
base
metals
including
Cu,
Co,
Mn,
Fe,
Ni
catalysts
has
enabled
advances
in
carbonylative
coupling
for
approaching
diverse
derivatives,
notably,
some
which
are
synthetic
importance
but
difficult
be
synthesized
through
previous
reported
methods.
Herein,
we
have
summarized
discussed
these
recent
achievements
base‐metal‐catalyzed
C—C,
C—N,
C—O,
C—X
other
source.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Май 31, 2023
Novel
strategy
for
acid
chlorides
formation
that
do
not
use
carboxylic
acids
is
particularly
attractive
in
chemical
synthesis
but
remains
challenging.
Herein,
we
reported
the
development
of
a
highly
effective
Pd-catalyzed
hydrochlorocarbonylation
alkenes
with
CO
alkyl
chlorides.
Chlorosilane
and
AcOH
were
found
as
mild
HCl
source
reaction.
The
reaction
shows
broad
substrate
scope
produces
both
branched
linear
good
to
high
yields
upon
different
ligands
solvents.
Cooperating
follow-up
acylation
reactions,
offers
complementary
platform
diverse
carbonyl
compounds
from
alkenes.
Mechanistic
investigations
suggested
proceeded
though
palladium
hydride
pathway,
prompted
reductive
elimination
acyl-Pd-Cl
intermediate.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(37)
Опубликована: Май 7, 2024
Abstract
A
general
and
highly
enantioselective
method
for
the
preparation
of
tetra‐substituted
3‐hydroxyphthalide
esters
via
isothiourea‐catalysed
acylative
dynamic
kinetic
resolution
(DKR)
is
reported.
Using
(2
S
,3
R
)‐HyperBTM
(5
mol
%)
as
catalyst,
scope
limitations
this
methodology
have
been
extensively
probed,
with
high
enantioselectivity
good
to
excellent
yields
observed
(>40
examples,
up
99
%,
:
1
er).
Substitution
aromatic
core
within
skeleton,
well
aliphatic
substitution
at
C(3),
readily
tolerated.
diverse
range
anhydrides,
including
those
from
bioactive
pharmaceutically
relevant
acids,
can
also
be
used.
The
in
DKR
process
has
probed
computationally,
a
key
substrate
heteroatom
donor
O⋅⋅⋅acyl‐isothiouronium
interaction
identified
through
DFT
analysis
necessary
enantiodiscrimination.
