ChemCatChem,
Journal Year:
2024,
Volume and Issue:
16(15)
Published: March 15, 2024
Abstract
Low‐valent
chromium
catalysts
are
cheap
and
less
toxic
compared
to
other
transition
metal
catalysts.
Here
in,
we
reported
a
ligand‐free
chromium(III)‐catalyzed
manganese
reductive
cross‐coupling
of
unactivated
alkyl
electrophiles,
such
as
sulfonates
chlorides,
with
trisulfide
dioxides
thiolation
agents
form
carbon−sulfur
bonds.
The
powerful
method
featured
ample
substrate
scope
wide
functional
group
tolerance,
constructing
large
number
unsymmetrical
disulfides
under
simple
conditions.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(3), P. 1575 - 1583
Published: Jan. 16, 2024
The
example
of
iron-catalyzed
reductive
fluoroalkylalkenylation
unactivated
alkenes
has
been
disclosed,
affording
the
stereodefined
homoallylic
fluoroalkanes
with
high
efficiency
and
regioselectivity.
This
three-component
cross-electrophile
coupling
features
directing
groups
free,
good
functional
group
tolerance,
broad
substrate
scope,
late-stage
difunctionalization
biorelevant
molecules.
Moreover,
this
protocol
sheds
light
on
distinct
reactivity
disparities
between
fluoroalkyl
nonfluoroalkyl
radicals
in
cross-coupling
reactions,
highlighting
unique
nature
iron/B2pin2
systems.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(9), P. 6432 - 6439
Published: April 11, 2024
Herein,
we
disclose
a
nickel-catalyzed
dearomative
reductive
aryl-fluoroalkenylation
of
indoles
by
defluorinative
coupling
with
gem-difluoroalkenes.
The
catalytic
protocol
affords
facile
assembly
various
monofluoroalkene-containing
polycyclic
fused
indolines
bearing
two
contiguous
carbon
stereocenters
in
high
diastereo-
and
enantioselectivities
tolerance
diverse
functional
groups.
The Chemical Record,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
Abstract
The
transition
metal
catalyzed
coupling
reaction
has
revolutionized
the
strategies
for
forging
carbon‐carbon
bonds.
In
contrast
to
traditional
cross‐coupling
methods
using
pre‐prepared
nucleophilic
organometallic
reagents,
reductive
reactions
C−C
bonds
formation
provide
some
advantages.
Because
both
partners
are
reduced
in
final
products
a
stoichiometric
amount
of
reductant,
this
approach
not
only
avoids
need
use
sensitive
species,
but
also
provides
an
orthogonal
and
complementary
access
classical
reaction.
Notably,
feature
readily
available
fragments,
promote
good
step
economy,
exhibit
high
functional
group
tolerance
unique
chemoselectivity,
which
have
propelled
their
increasingly
popular
organic
synthesis.
recent
years,
due
low
price,
minimal
toxicity,
environmentally
benign
character,
iron‐catalyzed
garnered
significant
attention
from
synthetic
chemists
pharmacologists,
especially
coupling.
This
review
aims
insightful
overview
advances
reactions,
illustrate
possible
mechanisms.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(32)
Published: July 4, 2024
Abstract
The
transition
metal‐catalyzed
multi‐component
cross‐electrophile
sulfonylation,
which
incorporates
SO
2
as
a
linker
within
organic
frameworks,
has
proven
to
be
powerful,
efficient,
and
cost‐effective
means
of
synthesizing
challenging
alkyl–alkyl
sulfones.
Transition
metal
catalysts
play
crucial
role
in
this
method
by
transferring
electrons
from
reductants
electrophilic
organohalides,
thereby
causing
undesirable
side
reactions
such
homocoupling,
protodehalogenation,
β
‐hydride
elimination,
etc.
It
is
worth
noting
that
tertiary
alkyl
halides
have
rarely
been
demonstrated
compatible
with
current
methods
owing
various
undesired
reactions.
In
work,
zinc‐promoted
sulfonylation
developed
through
radical‐polar
crossover
pathway.
This
approach
enables
the
synthesis
sulfones,
including
1°‐1°,
2°‐1°,
3°‐1°,
2°‐2°,
3°‐2°
types,
inexpensive
readily
available
halides.
Various
functional
groups
are
well
tolerated
resulting
yields
up
93%.
Additionally,
protocol
successfully
applied
intramolecular
homo‐sulfonylation
insights
gained
work
shall
useful
for
further
development
access
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(17), P. 12001 - 12009
Published: Aug. 15, 2024
Herein,
we
present
a
Ni-catalyzed
direct
cross-coupling
of
heteroaromatic
thioethers
with
aryl
iodides
via
selective
C(sp2)–S
bond
cleavage
under
reductive
conditions,
thereby
providing
various
biaryl
frameworks
high
efficiency.
Mechanistic
studies
suggested
Mo(CO)6
played
crucial
role
in
facilitating
the
activation
bond.
This
protocol
demonstrated
wide
substrate
scope,
operational
simplicity,
and
good
functional
group
compatibility.
Furthermore,
utility
this
reaction
was
highlighted
by
facile
scale-up
sequential
modification
heteroaryl
frameworks.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 31, 2024
Palladium-catalyzed
Suzuki–Miyaura
cross-coupling
is
an
efficient
approach
for
C–C
bond
construction.
Here
we
report
a
deaminative
reaction
to
achieve
chemo-
and
regioselectivity
in
the
of
nonactivated
propargylamines
with
boronic
acids,
which
methyl
propiolate
introduced
promote
cleavage
C–N
form
bond.
This
method
features
wide
range
substrates,
good
functional
group
tolerance,
ease
operation,
providing
alternative
accessing
valuable
propargylated
aromatic
compounds.