ACS Catalysis,
Journal Year:
2021,
Volume and Issue:
11(5), P. 2992 - 2998
Published: Feb. 22, 2021
The
concept
of
"umpolung"
reactivity
π-allylmetal
complexes
has
been
developed
as
a
powerful
method
for
the
allylation
aldehydes.
This
paper
describes
photocatalytic
umpolung
strategy
synthesis
nucleophilic
allylcobalt
through
single-electron-transfer
(SET)
process.
enables
metallaphotoredox
carbonyls
with
allyl
acetate
using
organic
N,N-diisopropylethylamine
terminal
reductant
bypassing
use
stoichiometric
amount
metals.
Ultraviolet–visible
spectroscopy
was
used
to
monitor
redox
changes
cobalt
in
reaction.
Chemical Reviews,
Journal Year:
2021,
Volume and Issue:
122(2), P. 1485 - 1542
Published: Nov. 18, 2021
The
merger
of
photoredox
catalysis
with
transition
metal
catalysis,
termed
metallaphotoredox
has
become
a
mainstay
in
synthetic
methodology
over
the
past
decade.
Metallaphotoredox
combined
unparalleled
capacity
for
bond
formation
broad
utility
photoinduced
electron-
and
energy-transfer
processes.
Photocatalytic
substrate
activation
allowed
engagement
simple
starting
materials
metal-mediated
bond-forming
Moreover,
electron
or
energy
transfer
directly
key
organometallic
intermediates
provided
novel
modes
entirely
complementary
to
traditional
catalytic
platforms.
This
Review
details
contextualizes
advancements
molecule
construction
brought
forth
by
metallaphotocatalysis.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(13), P. 7587 - 7680
Published: Jan. 1, 2021
Organic
compounds
that
show
Thermally
Activated
Delayed
Fluorescence
(TADF)
have
become
wildly
popular
as
next
generation
emitters
in
organic
light-emitting
diodes
(OLEDs),
but
since
2016,
received
significant
and
increasing
attention
photocatalysts.
Chemical Reviews,
Journal Year:
2021,
Volume and Issue:
121(7), P. 4084 - 4099
Published: Feb. 11, 2021
Asymmetric
allylic
alkylation
mediated
by
transition
metals
provides
an
efficient
strategy
to
form
quaternary
stereogenic
centers.
While
this
transformation
is
dominated
the
use
of
second-
and
third-row
(e.g.,
Pd,
Rh,
Ir),
recent
developments
have
revealed
potential
first-row
metals,
which
provide
not
only
a
less
expensive
potentially
equally
alternative
but
also
new
mechanistic
possibilities.
This
review
summarizes
examples
for
assembly
stereocenters
using
prochiral
substrates
hard,
achiral
nucleophiles
in
presence
copper
complexes
highlights
complementary
approaches
with
soft,
catalyzed
chiral
cobalt
nickel
complexes.
Journal of the American Chemical Society,
Journal Year:
2021,
Volume and Issue:
143(19), P. 7306 - 7313
Published: May 5, 2021
A
Co-catalyzed
highly
regio-
and
enantioselective
reductive
coupling
of
alkynes
aldehydes
has
been
developed
under
visible
light
photoredox
dual
catalysis.
variety
enantioenriched
allylic
alcohols
have
obtained
by
using
unsymmetrical
internal
commercially
available
catalyst,
chiral
ligand,
reagents.
It
is
noteworthy
that
this
approach
considerable
advantages,
such
as
excellent
(>95:5
for
>40
examples),
stereo-
(up
to
>95:5
E/Z),
enantioselectivity
(92-99%
ee,
>35
examples)
control,
mild
reaction
conditions,
broad
substrate
scope,
good
functional
group
compatibility,
making
it
a
great
improvement
alkyne-aldehyde
reactions.
ACS Catalysis,
Journal Year:
2022,
Volume and Issue:
12(5), P. 3013 - 3032
Published: Feb. 18, 2022
Sulfones
are
common,
readily
available
reagents
that
have
recently
attracted
attention
as
versatile
for
cross-coupling
reactions.
This
Review
summarizes
advances
in
desulfonylative
transformations
of
sulfones
affected
by
molecular
catalysis,
including
transition-metal
catalysts,
photocatalysts,
and
organocatalysts.
In
addition
to
catalyst
choice,
the
design
sulfonyl
group
is
a
critical
factor
control
reactivity.
The
concepts
presented
herein
will
provide
new
strategies
construct
diverse
molecules
with
high
efficiency
modularity.
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(15), P. 6774 - 6823
Published: Jan. 1, 2022
Sulfones
are
excellent
candidates
for
the
design
of
new
C–C
and
C–X
bond-forming
reactions
owing
to
easy
activation
C–S
bonds.
This
review
focuses
on
challenges
recent
opportunities
catalytic
functionalization
sulfones.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(12), P. 6944 - 6952
Published: March 15, 2023
Enantioselective
metallaphotoredox
catalysis,
which
combines
photoredox
catalysis
and
asymmetric
transition-metal
has
become
an
effective
approach
to
achieve
stereoconvergence
under
mild
conditions.
Although
many
impressive
synthetic
approaches
have
been
developed
access
central
chirality,
the
construction
of
axial
chirality
by
still
remains
underexplored.
Herein,
we
report
two
visible
light-induced
cobalt-catalyzed
reductive
couplings
biaryl
dialdehydes
synthesize
axially
chiral
aldehydes
(60
examples,
up
98%
yield,
>19:1
dr,
>99%
ee).
This
protocol
shows
good
functional
group
tolerance,
broad
substrate
scope,
excellent
diastereo-
enantioselectivity.
