Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Июль 10, 2023
Abstract
In
this
study,
the
catalytic
abilities
of
on
Ni-C
50
and
Ni-Si
nanocages
for
CO
2
reduction
reaction
to
CO,
CH
4
,
HCOOH,
HCHO
3
OH
creation
are
examined
by
theoretical
methods.
The
possible
mechanisms
ΔG
steps
produce
calculated.
Results
indicated
that,
rate
limiting
step
production
is
nanocage-*CO
→
nanocage-*CHO
nanocages.
shown
that
overpotential
lower
than
various
metal
catalysts.
It
can
be
concluded
nanocage
has
more
negative
values
free
barrier
energy
process
reduction.
demonstrated
HCOOH
Finally,
proposed
as
novel
catalysts
species.
European Journal of Organic Chemistry,
Год журнала:
2023,
Номер
26(29)
Опубликована: Июнь 14, 2023
Abstract
The
direct
use
of
alcohols
as
the
much
greener
and
more
sustainable
alkylated
reagents
in
substitution
reactions
is
one
emerging
areas
green
chemisty.
However,
owing
to
poor
leaving
character
OH
group,
not
an
easy
thing.
Transition
metal
(TM)
catalysis
such
Pd‐catalyzed
allylic/benzyl
Ir‐catalyzed
borrowing
hydrogen
provides
efficient
protocols
for
alcohols,
however,
organic
solvent
servely
anhydrous
conditions
are
generally
required.
In
recent
decade,
TM‐catalyzed
aqueous
media
was
developed
a
alternative.
this
review,
develpoments
area
summarized.
activation
mechanism
emphatically
discussed.
The Journal of Organic Chemistry,
Год журнала:
2023,
Номер
88(24), С. 16755 - 16772
Опубликована: Ноя. 28, 2023
Herein,
we
report
a
ligand-centered
redox-controlled
oxygen-dependent
switchable
selectivity
during
ruthenium-catalyzed
selective
synthesis
of
C3-alkylated
indoles
and
bis(indolyl)methanes
(BIMs).
A
wide
variety
BIMs
were
prepared
selectively
in
moderate
to
good
isolated
yields
by
coupling
alcohols,
catalyzed
well-defined,
air-stable,
easy-to-prepare
Ru(II)-catalyst
(1a)
bearing
redox-active
tridentate
pincer
(L1a).
Catalyst
1a
efficiently
the
C3-alkylation
under
an
argon
atmosphere
while,
oxygen
environment,
exclusively
producing
BIMs.
few
drug
molecules
containing
also
synthesized
efficiently.
exhibited
excellent
chemoselectivity
with
alcohols
internal
carbon–carbon
double
bonds.
Mechanistic
investigation
revealed
that
coordinated
azo-aromatic
ligand
actively
participates
catalysis.
During
dehydrogenation
azo-moiety
stores
hydrogen
removed
from
subsequently
transfers
alkylideneindolenine
intermediate,
forming
indoles.
While
transfer
scaffold
molecular
generates
H2O2,
leaving
no
scope
for
hydrogenation
rather
than
it
undergoing
1,4-Michael-type
addition
Catalysis Science & Technology,
Год журнала:
2023,
Номер
13(19), С. 5745 - 5756
Опубликована: Янв. 1, 2023
We
report
manganese-catalyzed
CH
alkylation
of
indole/indolines
with
alcohols,
where
catalyst
control
provides
product
selectivity.
synthesise
several
life
science
molecules
(vibrindole
A,
turbomycin
B
alkaloid
and
antileukemic
anticancer
agents).
European Journal of Organic Chemistry,
Год журнала:
2022,
Номер
26(5)
Опубликована: Дек. 23, 2022
Abstract
Bio‐derived
ethanol
is
a
promising
green
and
sustainable
hydrogen‐donor
solvent.
Herein,
we
have
developed
Ir‐catalyzed
transfer
hydrogenation
of
ketones
aldehydes
using
as
hydrogen
source
with
amides
simple
ligands.
Furthermore,
the
alkylation
tandem
alkylation/transfer
acetophenones
reported
ethanol.
The Journal of Organic Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 16, 2024
Herein,
we
describe
a
Zn-catalyzed
atom-economical,
inexpensive,
and
sustainable
method
for
preparing
broad
spectrum
of
substituted
olefins
utilizing
alcohols
as
the
main
precursor.
Using
Zn(II)
complex
[ZnLCl2]
(1)
redox-noninnocent
ligand
2-((4-chlorophenyl)diazenyl)-1,10-phenanthroline
(L),
various
(E)-olefins
were
prepared
in
good
yields
by
coupling
with
sulfones
aryl
cyanides
under
an
inert
atmosphere.
Under
aerial
atmosphere,
vinyl
nitriles
isolated
up
to
82%
yield
reacting
benzyl
presence
1.
Control
experiments
mechanistic
investigation
indicate
active
involvement
aryl-azo
electron
hydrogen
reservoir,
permitting
1
perform
promising
catalyst.
Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Май 31, 2023
Abstract
Here,
the
possible
mechanisms
for
CO
2
reduction
reaction
to
produce
CO,
CH
4
,
HCOOH,
HCHO
and
3
OH
species
on
surfaces
of
carbon
silicon
nanocages
(C
50
Si
)
as
catalysts
are
examined.
The
Ni
adoption
effects
C
their
catalytic
activity
investigated.
overpotential
Ni-C
Ni-Si
lower
than
corresponding
values
various
metal
catalysts,
significantly.
rate
limiting
step
production
is
nanocage-*CO
→
nanocage-*CHO
nanocages.
nanocage
has
more
negative
ΔG
process
steps
reduction.
HCOOH
creation
can
catalyze
processes
through
with
high
efficiency.
