ACS Catalysis,
Journal Year:
2021,
Volume and Issue:
11(8), P. 4576 - 4582
Published: March 31, 2021
Reported
herein
is
the
gold-catalyzed
1,2-aminoarylation
of
alkenes
that
engages
external
amine
as
a
coupling
partner.
Careful
optimization
studies
revealed
significant
role
concentration
base
to
achieve
highly
chemoselective
access
aminoarylation
products
over
potential
C–N
cross-coupled
products.
Overcoming
all
limitations,
current
strategy
provided
straightforward
medicinally
relevant
3-aminochroman,
2-aminotetrahydronaphthalene,
and
2-aminoindane
derivatives.
Journal of the American Chemical Society,
Journal Year:
2018,
Volume and Issue:
140(39), P. 12364 - 12368
Published: Sept. 20, 2018
A
Ni-catalyzed
enantioselective
reductive
diarylation
of
activated
alkenes
by
domino
cyclizative/cross-coupling
two
aryl
bromides
is
developed.
This
reaction
proceeds
under
very
mild
conditions
and
shows
broad
substrate
scope,
without
requiring
the
use
preformed
organometallic
reagents.
Moreover,
this
approach
provides
direct
access
to
various
bis-heterocycles
bearing
all-carbon
quaternary
centers
in
synthetically
useful
yields
(up
81%)
with
excellent
enantioselectivity
(>30
examples,
90–99%
ee).
Chemical Reviews,
Journal Year:
2021,
Volume and Issue:
121(21), P. 13238 - 13341
Published: Oct. 7, 2021
Organoboron
reagents
represent
a
unique
class
of
compounds
because
their
utility
in
modern
synthetic
organic
chemistry,
often
affording
unprecedented
reactivity.
The
transformation
the
carbon–boron
bond
into
carbon–X
(X
=
C,
N,
and
O)
stereocontrolled
fashion
has
become
invaluable
medicinal
agrochemistry,
natural
products
chemistry
as
well
materials
science.
Over
past
decade,
first-row
d-block
transition
metals
have
increasingly
widely
used
catalysts
for
formation
bond,
traditionally
catalyzed
by
expensive
precious
metals.
This
recent
focus
on
alternative
enabled
growth
fundamental
methods
organoboron
chemistry.
review
surveys
current
state-of-the-art
use
element-based
bonds.
Journal of the American Chemical Society,
Journal Year:
2019,
Volume and Issue:
141(18), P. 7637 - 7643
Published: April 19, 2019
Enantioselective
cross-electrophile
reactions
remain
a
challenging
subject
in
metal
catalysis,
and
with
respect
to
data,
studies
have
mainly
focused
on
stereoconvergent
of
racemic
alkyl
electrophiles.
Here,
we
report
an
enantioselective
aryl-alkenylation
reaction
unactivated
alkenes.
This
method
provides
access
number
biologically
important
chiral
molecules
such
as
dihydrobenzofurans,
indolines,
indanes.
The
incorporated
alkenyl
group
is
suitable
for
further
that
can
lead
increase
molecular
diversity
complexity.
proceeds
under
mild
conditions
at
room
temperature,
easily
accessible
pyrox
ligand
used
afford
products
high
enantioselectivity.
synthetic
utility
this
demonstrated
by
enabling
the
modification
complex
peptides,
indometacin,
steroids.
Journal of the American Chemical Society,
Journal Year:
2020,
Volume and Issue:
142(22), P. 10173 - 10183
Published: May 7, 2020
Developing
efficient
and
selective
strategies
to
approach
complex
architectures
containing
(multi)stereogenic
centers
has
been
a
long-standing
synthetic
challenge
in
both
academia
industry.
Catalytic
cascade
reactions
represent
powerful
means
of
rapidly
leveraging
molecular
complexity
from
simple
feedstocks.
Unfortunately,
carrying
out
Heck-type
involving
unactivated
(tertiary)
alkyl
halides
remains
an
unmet
owing
unavoidable
β-hydride
elimination.
Herein,
we
show
that
modular,
practical,
general
palladium-catalyzed,
radical
three-component
coupling
can
indeed
overcome
the
aforementioned
limitations
through
interrupted
Heck/allylic
substitution
sequence
mediated
by
visible
light.
Selective
1,4-difunctionalization
1,3-dienes,
such
as
butadiene,
achieved
employing
different
commercially
available
nitrogen-,
oxygen-,
sulfur-,
or
carbon-based
nucleophiles
bromides
(>130
examples,
mostly
>95:5
E/Z,
>20:1
rr).
Sequential
C(sp3)–C(sp3)
C–X
(N,
O,
S)
bonds
have
constructed
efficiently
with
broad
scope
high
functional
group
tolerance.
The
flexibility
versatility
strategy
illustrated
gram-scale
reaction
streamlined
syntheses
ether,
sulfone,
tertiary
amine
products,
some
which
would
be
difficult
access
via
currently
established
methods.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
58(41), P. 14653 - 14659
Published: Aug. 17, 2019
Abstract
A
highly
enantioselective
dicarbofunctionalization
of
unactivated
alkenes
was
implemented
by
a
Pd‐catalyzed
asymmetric
tandem
Heck/Suzuki
coupling
reaction.
This
reaction
represents
the
first
example
intramolecular
cyclization/cross‐coupling
olefin‐tethered
aryl
halides
with
alkyl‐,
alkenyl‐
or
arylboronic
acids,
and
provides
rapid
access
to
number
chiral
compounds,
such
as
dihydrobenzofurans,
indolines,
chromanes,
indanes
bearing
quaternary
stereocenter,
in
good
yields
excellent
enantioselectivities.
The
practicality
this
validated
modification
biologically
complex
molecules
peptides,
piperitol,
CB2
receptor
agonists,
etc.
Moreover,
synthesis
two
enantiomers
can
be
easily
realized
simple
change
order
steps
sequence.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
58(20), P. 6722 - 6726
Published: March 20, 2019
Abstract
Reported
is
an
asymmetric
reductive
dicarbofunctionalization
of
unactivated
alkenes.
Under
the
catalysis
a
Ni/BOX
system,
various
aryl
bromides,
incorporating
pendant
olefinic
unit,
were
successfully
reacted
with
array
primary
alkyl
bromides
in
presence
Zn
as
reductant,
furnishing
series
benzene‐fused
cyclic
compounds
bearing
quaternary
stereocenter
high
enantioselectivities.
Notably,
this
reaction
avoids
use
pregenerated
organometallics
and
demonstrates
tolerance
sensitive
functionalities.
The
preliminary
mechanistic
investigations
reveal
that
Ni‐catalyzed
proceeds
cascade
consisting
migratory
insertion
cross‐coupling
nickel(I)‐mediated
intramolecular
5‐
exo
cyclization
enantiodetermining
step.
Accounts of Chemical Research,
Journal Year:
2022,
Volume and Issue:
55(5), P. 734 - 745
Published: Feb. 4, 2022
ConspectusOlefin
functionalization
represents
one
of
the
most
important
synthetic
transformations
in
organic
synthesis.
Over
past
decades,
palladium-catalyzed
enantioselective
Heck
reactions,
and
Heck/anion-capture
domino
sequences
through
olefin
carbopalladation
followed
by
termination
resulting
alkyl-Pd
species
have
been
extensively
developed.
Extension
coupling
partners
from
classical
olefins
to
other
π-components
would
enable
further
advances
open
new
space
this
field.
Aromatics
are
easily
available
bulk
chemicals.
Dearomative
transformation
endocyclic
aromatic
π-bonds
via
reaction
pathway
provides
an
efficient
straightforward
route
structurally
diverse
alicyclic
compounds.
Nevertheless,
major
challenges
for
include
aromaticity
breaking
reactivity
selectivity
issues.Recently,
we
engaged
developing
catalytic
dearomative
reactions
related
reactions.
A
range
heteroarenes
naphthalenes
employed
as
novel
π-coupling
these
Through
migratory
insertion
C–C
interception
transient
species,
reductive
difunctionalization
heteroarenyne
cycloisomerization
established.
Relying
on
β-H
elimination
intermediate,
realized
with
a
partners,
including
heterocyclic
indoles,
pyrroles,
furans,
benzofurans,
more
challenging
carbocyclic
naphthalenes.
In
order
avoid
utilization
organohalide
electrophiles,
was
developed
merging
intermolecular
alkyne
hydropalladation
intramolecular
reaction.
Cycloisomerization
alkyne-tethered
indoles
delivered
chiral
indolines
excellent
enantioselectivities
100%
atom
economy.
On
hand,
were
established
nucleophilic
trapping
intermediate.
When
HCO2Na
capturing
reagent,
realized.
By
employing
nucleophiles,
alkynes,
N-sulfonylhydrazones,
organoboron
reagents,
series
Two
vicinal
stereocenters
enantio-
diastereoselectivities
constructed
corresponding
Heck/Sonogashira,
Heck/vinylation,
Heck/borylation
Moreover,
1,4-diarylation
Heck/Suzuki
which
competitive
C–H
arylation
direct
Suzuki
almost
fully
inhibited
presence
spiro-phosphoramidite
ligand.In
Account,
provide
panoramic
view
our
results
since
2015
extending
systems.
Investigations
outlined
Account
access
variety
heteropolycyclic
molecules
starting
simple
planar
Journal of the American Chemical Society,
Journal Year:
2021,
Volume and Issue:
143(27), P. 10282 - 10291
Published: June 24, 2021
Transition-metal-catalyzed
dicarbofunctionalization
of
alkenes
involving
intramolecular
Heck
cyclization
followed
by
intermolecular
cross-coupling
has
emerged
as
a
powerful
engine
for
building
heterocycles
with
sterically
congested
quaternary
carbon
centers.
However,
only
exo-cyclization/cross-coupling
products
can
be
obtained;
endo-selective
cyclization/cross-coupling
not
been
reported
yet
and
still
poses
formidable
challenge.
We
herein
report
the
first
example
catalyst-controlled
regiodivergent
synthesis
five-
six-membered
benzo-fused
lactams
bearing
all-carbon
Using
chiral
Pyrox-
or
Phox-type
bidentate
ligand,
5-exo
cyclization/cross-couplings
proceed
favorably
to
produce
indole-2-ones
in
good
yields
excellent
regioselectivity
enantioselectivities
(up
98%
ee).
When
C6-carboxylic
acid-modified
2,2′-bipyridine
was
used
3,4-dihydroquinolin-2-ones
were
obtained
through
6-endo-selective
processes.
This
transformation
is
modular
tolerant
variety
functional
groups.
The
ligand
rather
than
substrate
structures
precisely
dictates
pattern.
Moreover,
synthetic
value
this
protocol
demonstrated
preparation
biologically
relevant
molecules
structural
scaffolds.
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(25), P. 14068 - 14075
Published: April 1, 2021
Abstract
Reductive
carboxylation
of
organo
(pseudo)halides
with
CO
2
is
a
powerful
method
to
provide
carboxylic
acids
quickly.
Notably,
the
catalytic
reductive
carbo‐carboxylation
unsaturated
hydrocarbons
via
fixation
highly
challenging
but
desirable
approach
for
structurally
diverse
acids.
There
are
only
few
reports
and
no
examples
alkenes
transition
metal
catalysis.
We
report
first
asymmetric
nickel
A
variety
aryl
(pseudo)halides,
such
as
bromides,
triflates
inert
chlorides
particular
note,
undergo
reaction
smoothly
give
important
oxindole‐3‐acetic
acid
derivatives
bearing
C3‐quaternary
stereocenter.
This
transformation
features
mild
conditions,
wide
substrate
scope,
facile
scalability,
good
excellent
chemo‐,
regio‐
enantioselectivities.
The
highlights
formal
synthesis
(−)‐Esermethole,
(−)‐Physostigmine
(−)‐Physovenine,
total
(−)‐Debromoflustramide
B,
(−)‐Debromoflustramine
B
(+)‐Coixspirolactam
A;
thereby,
opening
an
avenue
chiral
natural
products
.