Visible-Light-Promoted α-C(sp3)–H Amidation of Cyclic Ethers under Redox-Neutral Conditions
Organic Letters,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 16, 2025
Reported
herein
is
a
visible-light-promoted
strategy
for
the
α-C(sp3)–H
amidation
of
cyclic
ethers
using
N-acyloxyamide
as
an
oxidative
amidating
reagent.
This
transformation
provides
straightforward
approach
to
various
α-amidated
under
metal-
and
additive-free
conditions.
The
synthetic
utility
products
was
demonstrated
through
facile
transformations,
including
reduction,
allylation,
acylation,
sulfonamidation,
gram-scale
reactions.
Preliminary
mechanistic
studies
suggest
radical/radical
cross-coupling
process,
with
C(sp3)–H
bond
cleavage
identified
rate-determining
step.
Язык: Английский
Rose bengal photocatalyzed expeditious multicomponent synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones/thiones under visible light irradiation
Journal of Heterocyclic Chemistry,
Год журнала:
2024,
Номер
61(9), С. 1455 - 1461
Опубликована: Июль 10, 2024
Abstract
The
combination
of
visible
light,
a
renewable
and
green
energy
source,
rose
bengal,
non‐toxic
organic
dye
as
photoredox
catalyst,
is
an
easy
efficient
method
for
synthesizing
3,4‐dihydropyrimidin‐2(1
H
)‐ones/thiones
in
EtOH
at
ambient
temperature
very
short
reaction
time.
present
work
offers
simple
operation,
workup,
rapid
conversion,
excellent
product
yields,
while
accommodating
wide
range
substrates.
Rose
bengal‐based
photocatalytic
approach
permits
foremost
sustainability,
which
delivers
economic
environmental
rewards.
Язык: Английский
A carbazole-based fully conjugated sp2c D–A covalent organic polymer for visible light mediated photocatalytic degradation of rhodamine B and Rose Bengal
Materials Advances,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
We
demonstrate
that
the
sp
2
carbon-linked
carbazole
based
covalent
organic
polymer
is
a
potential
photocatalyst
for
remediation
of
dyes
such
as
rhodamine
B
and
Rose
Bengal.
Язык: Английский
Recent advances of 9-fluorenone in photoredox catalysis
Molecular Catalysis,
Год журнала:
2025,
Номер
582, С. 115169 - 115169
Опубликована: Май 8, 2025
Язык: Английский
Investigation of Heavy Atom Effects and pH Sensitivity on the Photocatalytic Cross-Dehydrogenative Coupling Reaction of Halogenated Fluorescein dyes
Dyes and Pigments,
Год журнала:
2024,
Номер
232, С. 112437 - 112437
Опубликована: Сен. 7, 2024
Язык: Английский
Visible Light‐Driven Glycosylation Mediated by Trifluoromethyl Thianthrenium Triflate with Thioglycoside Donors
European Journal of Organic Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 23, 2024
Abstract
An
efficient
photoredox‐catalyzed
glycosylation
using
a
p
‐tolyl
thioglycoside
donor
in
the
presence
of
trifluoromethyl
thianthrenium
triflate
(TT‐CF
3
+
TfO
−
)
has
been
investigated.
This
approach
involves
generating
radical
via
single
electron
transfer
between
TT‐CF
and
photocatalyst
Rose
Bengal,
thereby
activating
thioglycosides
facilitating
glycosylation.
method
operates
under
mild
reaction
conditions
tolerates
variety
functional
groups.
Язык: Английский
Synthesis of diarylsulphide/diarylselenide embedded pyrazole-fused isocoumarins and isatin/ninhydrin hydrazones via acid catalyzed solvent and temperature controlled reactions
Organic & Biomolecular Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 11, 2024
Room
temperature
stirring
of
a
mixture
chalcogenated
arylhydrazones
and
ninhydrin
in
dichloromethane
(DCM)
the
presence
acid
leads
to
formation
pyrazole-fused
isocoumarins,
substituted
with
diarylsulphide/diarylselenide
moiety.
On
other
hand,
refluxing
same
protic
polar
solvent
ethanol
produces
containing
hydrazones.
Further
study
reveals
that,
like
ninhydrin,
isatin
can
also
generate
corresponding
hydrazones
at
C-3
position
under
similar
reaction
conditions.
Язык: Английский