Photocatalysts
have
recently
attracted
significant
interest
due
to
their
potential
applications
in
sustainable
energy-conversion
systems.
In
organic
chemistry,
recyclability
of
photocatalysts
are
important
characteristics
with
respect
environmental
concerns
and
economic
benefits.
Metal-based
polypyridyl
complexes
ruthenium
iridium
been
widely
used
as
recyclable
homogeneous
photoredox
catalysts,
whereas
organophotoredox
catalysts
less
explored
usually
limited
the
use
polymer
methods.
Herein,
we
report
design
synthesis
phenothiazine
(PTHS
1–3).
These
exhibit
relatively
high
excited-state
oxidation
potentials
(E1/2ox*
=
−2.34
−2.40
V
vs.
SCE)
that
can
efficiently
promote
reactions
via
one-electron
reduction
1,3-bis(trifluoromethyl)benzene
4-trifluoromethyliodobenzene,
which
(Ep/2
−2.07
−2.16
SCE).
Notably,
when
recycling
performance
was
evaluated
cross-coupling
reaction
between
an
aryl
halide
triethylphosphite,
PTHS-1
be
recovered
at
least
four
times
without
loss
its
catalytic
activity.
The
present
reusable
thus
represent
a
promising
tool
for
synthesis.
Green Chemistry,
Год журнала:
2023,
Номер
25(23), С. 9672 - 9679
Опубликована: Янв. 1, 2023
A
H
2
O-promoted
and
(NH
4
)
CO
3
-enabled
defluoroiminization
reaction
of
fluoroalkyl
alkenes
for
the
synthesis
fluoroalkylated
1,5-diazapentadienes
has
been
developed.
Organic Letters,
Год журнала:
2023,
Номер
25(24), С. 4451 - 4455
Опубликована: Июнь 9, 2023
An
unexpected
[5
+
1
3]
cascade
cyclization
to
the
preparation
of
benzo[4,5]thieno[3,2-d]pyrimidine
derivatives
has
been
disclosed.
In
new
protocol,
o-nitrochalcones
reacted
with
elemental
sulfur
and
guanidine
promoted
by
NaOH,
which
in
EtOH
for
20
min,
providing
structurally
diverse
benzo[4,5]thieno[3,2-d]pyrimidines
good
yields
(77-89%)
wide
substrate
compatibility
(33
examples).
The Journal of Organic Chemistry,
Год журнала:
2023,
Номер
88(20), С. 14697 - 14707
Опубликована: Сен. 29, 2023
A
facile
and
practical
approach
for
the
preparation
of
substituted
pyrimidines
from
ketones,
NH4OAc,
N,N-dimethylformamide
dimethyl
acetal
has
been
described.
This
NH4I-promoted
three-component
tandem
reaction
affords
a
broad
range
in
acceptable
yields
under
metal-
solvent-free
conditions.
The
present
methodology
features
advantages
simple
easily
available
starting
materials,
conditions,
substrate
scope
with
good
functional
group
tolerance,
gram-scale
synthesis.
Chemistry - A European Journal,
Год журнала:
2024,
Номер
30(27)
Опубликована: Март 11, 2024
A
visible-light-induced
strategy
has
been
explored
for
the
synthesis
of
naphtho[2,1-d]thiazol-2-amines
through
ortho-C-H
sulfuration
2-isocyanonaphthalenes
with
elemental
sulfur
and
amines
under
external
photocatalyst-free
conditions.
This
three-component
reaction,
which
utilizes
as
odorless
source,
molecular
oxygen
clean
oxidant,
visible
light
energy
provides
a
mild
efficient
approach
to
construct
series
naphtho[2,1-d]thiazol-2-amines.
Preliminary
mechanistic
studies
indicated
that
visible-light-promoted
photoexcitation
reaction
intermediates
consisting
thioureas
DBU
might
be
involved
in
this
transformation.
Organic Chemistry Frontiers,
Год журнала:
2024,
Номер
11(17), С. 4779 - 4784
Опубликована: Янв. 1, 2024
A
novel
and
unique
nitrogen
atom
insertion
into
naphthoquinone
rings
to
construct
structurally
valuable
polycyclic
heterocycles
at
room
temperature
under
transition-metal-free
conditions
has
been
described.
Organic Chemistry Frontiers,
Год журнала:
2023,
Номер
10(21), С. 5457 - 5462
Опубликована: Янв. 1, 2023
An
I
2
O
5
-promoted
chemoselective
three-component
tandem
reaction
of
indole-3-carboxaldehydes,
ammonium
acetate,
and
alkynes
for
the
construction
α-carbolines
under
metal-free
conditions
has
been
described.
Chinese Journal of Chemistry,
Год журнала:
2023,
Номер
42(8), С. 846 - 852
Опубликована: Дек. 20, 2023
Comprehensive
Summary
A
convenient
approach
for
the
construction
of
2‐aminobenzothiazoles
via
I
2
‐catalyzed
tandem
cyclization
reaction
amines
and
carbon
disulfide
has
been
developed.
The
present
starts
from
simple
readily
available
starting
materials,
affording
a
series
in
up
to
89%
yields
under
metal‐free
conditions.
In
this
work,
C—H/N—H
functionalization
was
achieved
multiple
C‐hetero
bonds
were
successfully
constructed
one
pot.
Chemical Communications,
Год журнала:
2023,
Номер
59(93), С. 13835 - 13838
Опубликована: Янв. 1, 2023
A
method
for
concise
and
regioselective
synthesis
of
indazolo[2,3-
a
]quinazolines
has
been
developed
via
sequential
annulation
dehydrogenative
aromatization
cyclohexanones.
