Green Synthesis and Catalysis,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 1, 2024
An
electrocatalytic
3,3-rearrangement/cyclization
approach
has
been
developed
for
the
transformation
of
aryl-substituted
propargylic
aryl
ethers
to
naphtho[1,2-b]furan-2-carbaldehyde
and
naphtho[2,1-b]furan-2-carbaldehyde
derivatives.
The
reaction
proceeded
efficiently
under
mild
conditions
in
absence
metal-
chemical-oxidant,
yielding
desired
products
with
good
substrate
scope
functional
group
tolerance
via
a
radical
pathway.
Furthermore,
control
experiment
revealed
that
phenylselenyl-substituted
secondary
alcohol
might
be
intermediate,
18O
labeling
indicated
oxygen
source
product
possibly
deriving
from
water.
Significantly,
further
transformations
were
conducted
showcase
utility
this
electrosynthesis
strategy.
Organic & Biomolecular Chemistry,
Journal Year:
2024,
Volume and Issue:
22(32), P. 6443 - 6484
Published: Jan. 1, 2024
Alkynes
are
important
in
organic
synthesis.
This
review
mainly
focuses
on
the
recent
advances
(2013–2023)
alkynes
with
C–S
bond
formation,
based
more
than
30
kinds
of
sulfur
reagents.
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(19), P. 10240 - 10246
Published: Jan. 1, 2024
Herein,
we
report
a
general
and
sustainable
electrochemically
promoted
oxidative
selenocyclization
protocol
for
the
synthesis
of
organoselenyl
isoxazoles
from
2-alkyn-1-one
O
-methyloximes
diorganyl
diselenides.
Organic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(9), P. 2566 - 2571
Published: Jan. 1, 2024
A
general,
efficient,
and
mild
Dha
electrochemical
modification
strategy
is
reported,
which
enables
a
divergent
route
to
various
α,α-disubstituted
amino
esters
via
anodic
cascade
oxidation
nucleophilic
attack.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(8), P. 5266 - 5276
Published: April 9, 2024
A
transition
metal-free
concise
and
efficient
protocol
for
the
synthesis
of
thiocyanated
aminomaleimides
benzo[e][1,4]thiazepine
derivatives
has
been
developed.
The
method
involves
an
initial
α-C–H
thiocyanation
with
KSCN
TEMPO-mediated
tandem
S–CN
bond
cleavage/intramolecular
cyclization
substitution
processes,
which
enables
formation
seven-membered
S/N-heterocycles.
This
synthetic
strategy
provides
a
reliable
biologically
interesting
by
using
as
sulfur
sources
well
expands
application
enaminones
reactions
in
heterocycles
synthesis.
Journal of The Electrochemical Society,
Journal Year:
2024,
Volume and Issue:
171(5), P. 055501 - 055501
Published: April 19, 2024
A
green
protocol
for
construction
of
C−Se
bonds
from
ketene
dithioacetals
and
diselenides
through
direct
electrochemical
oxidative
cross-coupling
has
been
developed.
This
reaction
was
carried
out
in
an
undivided
cell
system
with
NaBF
4
as
the
electrolyte
CH
3
CN
solvent
galvanostatic
electrolysis.
series
substituted
were
tolerant
desired
tetrasubstituted
alkenyl
selenides
obtained
moderate
to
excellent
yields.
In
addition,
C−S
bond
disulfides
method
presence
KI
also
successfully
realized.
It
exhibited
high
efficiency
broad
functional
group
tolerance.
Organic Letters,
Journal Year:
2024,
Volume and Issue:
26(18), P. 4018 - 4023
Published: April 26, 2024
Although
extraordinary
advances
have
been
achieved
by
the
transition-metal
catalysis
system,
there
is
an
urgent
need
to
explore
and
develop
alternative
methodologies
that
are
more
environmentally
friendly.
Herein,
we
report
electrochemical
chlorosulfonylation
of
alkenes
using
a
wide
range
sulfonyl
chlorides
with
inexpensive,
degradable,
commercially
available
organoboron
as
promoter.
Furthermore,
this
protocol
employs
convergent
paired
electrolysis,
reducing
for
sacrificial
anodes
minimizing
extent
hydrogen
evolution.
Advanced Synthesis & Catalysis,
Journal Year:
2024,
Volume and Issue:
366(12), P. 2721 - 2727
Published: May 11, 2024
Abstract
A
catalyst‐free
electrochemical
alkylacetoxylation
reaction
of
terminal
alkynes
with
(thio)xanthenes
and
carboxylic
acids
is
developed.
Treating
the
addition
products
K
2
CO
3
as
a
base
in
methanol
affords
ketones
moderate
to
good
yields.
Preliminary
experimental
computational
studies
indicate
that
benzylic
cation
generated
from
triggers
electrophilic
alkynes.
Abstract
Alkynes
are
simple
yet
important
organic
feedstocks.
The
selenylation
of
alkynes
is
able
to
produce
complex
selenium‐containing
compounds
in
a
facile
way.
Although
there
some
reviews
about
the
alkynes,
most
them
focus
on
one
specific
reaction
or
what
types
products
that
can
be
obtained.
There
lack
attention
given
various
uses
different
selenium
reagents
and
their
mechanisms.
This
review
mainly
focuses
recent
advances
(2013–2023)
based
diverse
reagents.
Mechanisms
how
added
work
will
discussed.
Different
types,
including
difunctionalization,
Se‐annulation,
spiro‐cyclization,
C−Se
coupling,
click
recorded
this
review.
regioselectivity
achieved
through
mechanisms,
radicals,
seleniraniums
electrophilic
cyclization.
We
hope
it
do
help
for
future
research
area.
