Asian Journal of Organic Chemistry,
Год журнала:
2019,
Номер
8(6), С. 893 - 898
Опубликована: Март 19, 2019
Abstract
Diverse
allylic
sulfones
are
generated
through
a
three‐component
reaction
of
potassium
alkyltrifluoroborates,
sulfur
dioxide
and
bromides
in
the
presence
9‐mesityl‐10‐methyl
acridinium
perchlorate
under
visible
light
irradiation
at
room
temperature.
This
transformation
proceeds
efficiently,
broad
scope
is
demonstrated
with
good
functional
groups
tolerance.
initiated
by
treatment
alkyltrifluoroborate
visible‐light
photocatalyst,
leading
to
alkyl
radical.
radical
intermediate
trapped
provide
alkylsulfonyl
radical,
which
then
undergoes
further
afford
corresponding
sulfone.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(2), С. 2169 - 2175
Опубликована: Янв. 10, 2019
By
employing
cheap
and
biodegradable
natural
deep
eutectic
solvent
as
the
catalyst
reaction
media,
selective
selenocyanation
of
activated
alkynes
via
an
intermolecular
H-bonding
activation
pathway
has
been
achieved,
which
allows
for
efficient
construction
various
Z-vinyl
selenolates.
Organic Letters,
Год журнала:
2019,
Номер
21(13), С. 4950 - 4954
Опубликована: Июнь 10, 2019
A
multicomponent
sulfonylation
of
O-acyl
oximes
via
iminyl
radicals
with
the
insertion
sulfur
dioxide
under
photoredox
catalysis
is
achieved.
This
reaction
oximes,
potassium
metabisulfite,
alkenes,
and
nucleophiles
visible-light
irradiation
efficient,
giving
rise
to
a
range
sulfones
in
moderate
good
yields.
broad
scope
presented
functional
group
compatibility.
Chemical Communications,
Год журнала:
2019,
Номер
55(43), С. 6010 - 6013
Опубликована: Янв. 1, 2019
A
sulfonylation
reaction
of
4-substituted
Hantzsch
esters,
DABCO·(SO2)2,
and
electron-deficient
alkenes
at
room
temperature
in
the
presence
photoredox
catalysis
under
visible
light
irradiation
is
described.
Not
only
(E)-chalcones
but
also
(vinylsulfonyl)benzene
2-vinylpyridine
are
all
suitable
substrates
transformation.
This
mild
conditions
shows
a
broad
substrate
scope
with
good
functional
group
compatibility.
plausible
mechanism
proposed,
which
that
esters
would
be
radical
reservoirs
catalysis.
The
alkyl
generated
situ
from
ester
trapped
by
sulfur
dioxide
to
produce
an
alkylsulfonyl
radical,
then
undergo
further
transformation
leading
final
outcome.
Organic Chemistry Frontiers,
Год журнала:
2019,
Номер
6(13), С. 2183 - 2199
Опубликована: Янв. 1, 2019
Recent
advances
in
the
metal-catalyzed
radical-type
transformation
of
unactivated
alkyl
halides
with
C–C
bond
formation
under
photoinduced
conditions
are
summarized.
Usually,
a
broad
reaction
scope
is
observed
including
tertiary,
secondary,
and
primary
halides,
good
functional
group
compatibility.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(16), С. 14009 - 14015
Опубликована: Авг. 2, 2019
In
the
present
study,
we
describe
successful
development
of
a
novel
and
efficient
C(sp2)–H
thiocyanation
reaction
electron-rich
heteroarenes
arenes
with
readily
available
ammonium
thiocyanate
under
visible
light
exposure.
Most
importantly,
proceeded
smoothly
without
addition
any
photocatalyst
or
strong
oxidant,
ultimately
minimizing
production
chemical
waste.
The
advantages
this
met
requirements
green
sustainable
synthetic
chemistry
may
be
widely
used
in
organic
synthesis
pharmaceutical
chemistry.
European Journal of Organic Chemistry,
Год журнала:
2019,
Номер
2020(10), С. 1274 - 1287
Опубликована: Май 3, 2019
Recent
advances
in
the
photoinduced
sulfonylation
reactions
through
insertion
of
sulfur
dioxide
are
summarized.
Among
approaches
developed
reactions,
via
radical
process
can
be
accomplished
with
assistance
photoredox
catalysis
presence
visible
light
or
under
ultraviolet
irradiation,
depending
substrates
used
reactions.
Under
conversion
completed
metal‐
and
additive‐free
conditions.
It
is
noteworthy
that
alkyl
halides
possessing
eliminable
β‐hydrogen
atom
effective
as
precursors
dioxide.
Two
parts,
according
to
reaction
pathways,
introduced:
(a)
photo‐initiated
formation
subsequent
capture
dioxide;
(b)
photo‐assisted
single
electron
transfer
(SET)
after
During
transformation,
an
oxidative
reductive
would
occur
catalysis.
Organic Letters,
Год журнала:
2019,
Номер
21(6), С. 1935 - 1938
Опубликована: Март 6, 2019
A
multicomponent
reaction
of
styrenes,
aryldiazonium
tetrafluoroborates,
sulfur
dioxide,
nitriles,
and
water
in
the
presence
a
photocatalyst
at
room
temperature
is
performed.
This
vicinal
aminosulfonylation
styrenes
with
insertion
dioxide
under
visible
light
irradiation
proceeds
efficiently
excellent
chemoselectivity,
giving
rise
to
corresponding
β-sulfonyl
amides
moderate
good
yields.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(7), С. 7193 - 7199
Опубликована: Март 8, 2019
An
environmentally-friendly
method
for
the
clean
preparation
of
various
quinolin-2-yl
substituted
ureas
in
water
under
mild
and
toxic
reagent-,
base-,
organic
solvent-free
conditions
was
established.
In
large-scale
synthesis,
products
could
be
rapidly
collected
via
simple
filtration
washing
with
ethanol.
The
usage
readily
available
raw
materials,
100%
atom
economy,
high
yield,
excellent
regioselectivity
enhanced
practicability
this
protocol.
