Alcohols as Alkyl Synthons Enabled by Photoredox-Catalyzed Deoxygenative Activation
Tanumoy Mandal,
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Samrat Mallick,
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Malekul Islam
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et al.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(17), P. 13451 - 13496
Published: Aug. 26, 2024
Alcohols
are
abundant
with
versatile
structural
variety
and
have
ample
use
as
pivotal
functional
groups
in
numerous
organic
processes.
Because
of
their
frequent
occurrence
enumerable
natural
products,
bioactive
molecules,
medicinal
components,
alcohol
functionalities
provide
a
promising
scope
research
to
advance
the
operational
diversity
for
improving
clinical
success.
Recent
years
witnessed
design
modern
C–C
C–heteroatom
bond-forming
approaches
easily
accessible
commercially
available
unactivated
aliphatic
alcohols
native
adaptive
sp3
handles,
hence
offering
groundbreaking
transformative
pathways
functionalization
complex
molecular
architectures.
The
judicial
application
appropriate
activating
generate
alkyl
radical
from
through
C–O
bond
fragmentation
employ
it
potential
alkylating
agent
unfolds
unique
synthetic
strategies,
thereby
replacing
obvious
requirement
halides.
This
review
elaborately
discusses
recent
trends
regarding
using
C(sp3)-centered
various
chemical
transformations
by
exploiting
different
activation
modes
disrupter
under
photoredox
catalysis.
presentation
is
organized
nature
scaffolds,
kind
formation,
progress
achieved
this
domain
since
original
discovery
providing
illustrative
examples
mechanistic
details,
focus
on
difficulties
future
prospects.
Language: Английский
EDA Complex-Enabled Annulation to Access CF2-Containing Tetralones and Quinazolinones Using Persulfates as Electron Donors
Shupeng Zhang,
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Dawei Guo,
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Mei-Ling Yang
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et al.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(15), P. 10614 - 10623
Published: July 25, 2024
A
photocatalyst-free
and
EDA
complex-enabled
radical
cascade
cyclization
reaction
of
inactive
alkenes
with
bromodifluoroacetamides
was
reported
for
the
divergent
synthesis
fluorine-containing
tetralones
quinazolinones.
In
this
transformation,
persulfates
as
electron
donors
difluoro
bromamide
acceptors
generate
complex.
This
is
a
promising
photochemical
method
advantages
such
mild
conditions,
simple
operation,
being
metal-free,
excellent
functional
group
tolerance.
Language: Английский
Visible-Light-Promoted Deoxygenative Alkylation of Quinoxalin-2(1H)-ones with Activated Alcohols
Lili Wang,
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Pengyuan Yang,
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Jinwei Yuan
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et al.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(9), P. 6334 - 6344
Published: April 15, 2024
A
one-pot
strategy
for
deoxygenative
alkylation
of
alcohols
with
quinoxalin-2(1H)-ones
was
developed
by
using
xanthate
salts
as
alcohol-activating
groups
radical
generation
in
the
presence
tricyclohexylphosphine
under
visible-light-promoted
conditions.
The
remarkable
features
this
reaction
include
a
broad
substrate
scope,
excellent
functional
group
tolerance,
mild
conditions,
and
simple
operation.
Moreover,
synthetic
utility
validated
success
two-step
reactions,
scale-up
synthesis,
chemoselective
monodeoxygenation
diols.
Language: Английский
Deuterium- and Electron-Shuttling Catalysis for Deoxygenative Deuteration of Alcohols
Bin‐Qing He,
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Xuesong Wu
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Organic Letters,
Journal Year:
2023,
Volume and Issue:
25(35), P. 6571 - 6576
Published: Aug. 30, 2023
A
practical
and
precise
method
for
visible-light-promoted
deoxygenative
deuteration
of
common
aliphatic
alcohols
using
D2O
as
the
deuterium
source
is
reported.
Upon
intermediacy
xanthate
anions,
a
variety
primary,
secondary,
tertiary
can
be
facilely
transformed
into
deuterioalkanes
with
excellent
D-incorporation
at
predicted
sites.
The
deoxygenation
sequence
catalyzed
by
in
situ
formed
deuterated
2-mercaptopyridine,
which
plays
dual
roles
atom
transfer
catalyst
an
electron
shuttle
well.
Language: Английский
Synthesis of 2‐(β‐Trifluoromethyl‐β‐arylethylthio)pyridine through DBU‐Mediated Regioselective Addition of Pyridine‐2(1H)‐thione Onto α‐(Trifluoromethyl)styrenes
Pai Zheng,
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Yupian Deng,
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Jingjing He
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et al.
Asian Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
13(3)
Published: Jan. 8, 2024
Abstract
An
efficient
and
practical
method
for
the
synthesis
of
(β‐trifluoromethyl‐β‐aryl)ethyl
2‐pyridyl
thioethers
via
hydrothiolation
α‐(trifluoromethyl)styrenes
with
pyridine‐2(1
H
)‐thione
was
reported.
The
reaction
proceeded
smoothly
regioselectively
in
an
anti‐Markovnikov
manner
assistance
DBU
afforded
a
variety
trifluoromethyl‐containing
moderate
to
good
yields.
Language: Английский
Metal-free photoinduced denitrogenative alkylation of vinyl azides with alkyl radicals toward ketones
Hui Yin,
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Siqi Jian,
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Xiujuan Feng
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et al.
Organic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(11), P. 3124 - 3130
Published: Jan. 1, 2024
A
metal-free
method
for
the
synthesis
of
ketones
via
a
visible-light
induced
denitrogenative
alkylation
vinyl
azides
with
alkyl
radicals
is
presented.
Language: Английский
N‐Directed defluorinative γ‐C(sp3)−H allylation of sulfamate esters for synthesis of gem‐difluoroalkenes via photoredox catalysis
Jiawen Yang,
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Meng Li,
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Guang‐Qiang Tan
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et al.
European Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
27(17)
Published: March 29, 2024
Abstract
gem
‐Difluoroalkenes
are
unique
structural
motifs
with
important
applications
ranging
from
drugs
to
materials.
Herein,
we
report
a
novel
radical‐mediated
defluorinative
allylation
of
sulfamate
esters
through
distal
C(sp
3
)−H
functionalization
under
photoredox
conditions.
The
reaction
could
readily
incorporate
various
‐difluoroalkene
into
previously
unfunctionalized
sp
carbon
centers.
transformation
allows
directly
dual
activation
N−H
and
bonds
via
photocatalytic
redox‐neutral
process,
as
well
using
water
environmentally
friendly
co‐solvent.
provide
general
operationally
simple
method
access
compounds
high
diversity.
Language: Английский
Synthesis of gem-Difluorohomoallyl Amines via a Transition-Metal-Free Defluorinative Alkylation of Benzyl Amines with Trifluoromethyl Alkenes
Man Ren,
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Shengjiao Yu,
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Xuefeng Li
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et al.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(12), P. 8342 - 8356
Published: May 31, 2024
A
mild
and
transition-metal-free
defluorinative
alkylation
of
benzyl
amines
with
trifluoromethyl
alkenes
is
reported.
The
features
this
protocol
are
easy-to-obtain
starting
materials,
a
wide
range
substrates,
functional
group
tolerance
as
well
high
atom
economy,
thus
offering
strategy
to
access
variety
Language: Английский