Asian Journal of Organic Chemistry,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Nov. 23, 2023
Abstract
Isochromans
are
valuable
building
blocks
for
the
synthesis
of
natural
products
and
bioactive
compounds.
Herein,
we
report
a
diastereoselective
halo‐cycloacetalization
olefinic
aldehydes
alcohols
using
N
‐haloamides
as
halogenating
agents.
The
reaction
conditions
mild
can
be
operated
in
absence
external
catalysts.
Olefinic
bearing
different
substituents
various
compatible
with
protocol,
giving
isochroman
derivatives
efficiently.
Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
30(43)
Published: May 24, 2024
The
ability
of
triaryltelluronium
salts
to
interact
with
N-halosuccinimides
(NXS)
through
chalcogen
bonding
(ChB)
in
the
solid
state
and
solution
is
demonstrated
herein.
Cocrystals
bearing
two
CF
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
146(1), P. 57 - 61
Published: Dec. 18, 2023
The
exploration
of
fourth-period
organoelements,
particularly
organoseleniums
in
their
highest
VI
oxidation
state,
is
limited
owing
to
stability
and
synthesis.
Herein,
the
isolation
a
new
class
quinolinyl-embedded,
hexavalent
selenium(VI)
benzoselenonates
has
been
discussed
further
evaluated
for
metal-free
electrocatalytic
hydrogen
evolution
reaction
(HER).
Se(VI)
exhibited
high
Faradaic
efficiency
(F.E.)
H2
gas
production
up
86%
with
very
good
turnover
number
(TON)
43
moderate
overpotential
(η)
500
mV;
presence
mild
acetic
acid
source
less
deprotonating
DMF
solvent.
Taken
together
various
(NMR,
UV–vis,
EPR)
spectroscopic
DFT
computation
studies,
plausible
HER
pathway
proposed,
which
suggests
that
electrochemical
reduction
quinolinyl
ring
initiation
step
acts
as
site
by
involving
hydridic
type
intermediate
generation.
Selenium-based
catalysts
have
recently
been
utilized
to
facilitate
a
variety
of
new
organic
transformations,
owing
their
intrinsic
advantages,
including
low
cost,
toxicity,
stability
in
both
air
and
water,
strong
compatibility
with
diverse
functional
groups.
The
difunctionalization
alkenes-the
process
incorporating
two
groups
onto
carbon-carbon
double
bond-has
garnered
particular
interest
within
the
chemical
community
its
significant
applications
synthesis.
Recently,
organoselenium-catalyzed
alkenes
has
emerged
as
an
ideal
powerful
route
obtain
high-value
vicinal
difunctionalized
molecules.
This
review
emphasizes
recent
advancements
this
rapidly
evolving
field,
focusing
on
scope,
limitations,
mechanisms
various
reactions.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(32), P. 13058 - 13067
Published: Jan. 1, 2024
A
thianthrene
(TT)/TfOH-catalyzed
electrophilic
halogenation
has
been
developed,
enabling
broad
substrate
applicability
and
diverse
types
via
the
generation
of
a
TT-based
halogenated
thianthrenium
salt.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(19), P. 14328 - 14340
Published: Sept. 16, 2024
Here,
the
synthesis
and
catalytic
activities
of
benzoimidazole-derived
organoselenium
compounds
have
been
explored.
The
synthesized
bis(2-benzoimidazolyl)
diselenide,
having
increased
Lewis
acidity
on
selenium
center,
outperforms
simple
phenyl
Chemistry - A European Journal,
Journal Year:
2023,
Volume and Issue:
29(71)
Published: Sept. 25, 2023
Recently,
chalcogen
bond
catalysts
with
telluronium
cations
have
garnered
considerable
attention
in
organic
reactions.
In
this
work,
catalysis
on
the
bromination
reaction
of
anisole
N-bromosuccinimide
(NBS)
cationic
has
been
explored
density
functional
theory
(DFT).
The
catalytic
is
divided
into
two
stages:
bromine
transfer
step
and
proton
step.
Based
computational
results,
one
can
find
rate-determining
Moreover,
present
study
elucidates
that
a
stronger
between
NBS
will
give
better
performance.
Additionally,
work
also
clarified
importance
electrostatic
polarization
effects
oxygen
atom
Te
catalyst
reaction.
are
significantly
influenced
by
electron-withdrawing
ability
substitution
groups
catalysts.
structure-property
relationship
strength
bond,
effect,
effect
performance
established
for
design
more
efficient
Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 23, 2024
Abstract
The
high
utility
of
halogenated
organic
compounds
has
prompted
the
development
numerous
transformations
that
install
carbon‐halogen
motif.
Halogen
functionalities,
deemed
as
“functional
and
functionalizable”
molecules
due
to
their
capacity
modulate
diverse
internal
properties,
constitute
a
pivotal
strategy
in
drug
discovery
development.
Traditional
routes
these
building
blocks
have
commonly
involved
multiple
steps,
harsh
reaction
conditions,
use
stoichiometric
and/or
toxic
reagents.
With
emergence
solid
halogen
carriers
such
N
‐halosuccinimides,
halohydantoins
popular
sources
halonium
ions,
past
decade
witnessed
enormous
growth
new
catalytic
strategies
for
halofunctionalization.
This
review
aims
provide
nuanced
perspective
on
nucleophilic
activators
roles
activation.
It
will
highlight
critical
discoveries
effecting
racemic
asymmetric
variants
reactions,
driven
by
catalysts,
activation
modes,
improved
understanding
chemical
reactivity
kinetics.
