Organic & Biomolecular Chemistry,
Journal Year:
2023,
Volume and Issue:
21(45), P. 8989 - 8992
Published: Jan. 1, 2023
Owing
to
the
ubiquity
of
hydroxyl
group,
reductive
deoxygenation
alcohols
has
become
an
active
research
area.
The
classic
Barton-McCombie
reaction
suffers
from
a
tedious
two-step
procedure.
New
efficient
methods
have
been
developed,
but
they
some
limitations,
such
as
narrow
substrate
scope
and
use
moisture-sensitive
Lewis
acids.
In
this
work,
we
describe
Ph3P/ICH2CH2I-promoted
with
NaBH4.
process
is
applicable
benzyl,
allyl
propargyl
alcohols,
also
primary
secondary
demonstrating
wide
good
level
functional
group
tolerance.
This
protocol
features
convenient
operation
low
cost
all
reagents.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(21), P. 16022 - 16027
Published: Oct. 11, 2024
Reductive
deoxygenation
of
alcohols
is
particularly
challenging
because
the
high
bond
dissociation
energy
C–OH
and
poor
leaving
ability
hydroxyl
group.
Herein
we
describe
a
Ph3P═O-catalyzed
reductive
benzyl
with
PhSiH3
under
an
air
atmosphere
within
30
min
reaction
time.
The
use
catalytic
loading
Ph3P═O
enhances
practicality
this
protocol.
Chemical Communications,
Journal Year:
2023,
Volume and Issue:
59(38), P. 5733 - 5736
Published: Jan. 1, 2023
The
direct
synthesis
of
sterically
hindered
aldehydes
is
highly
challenging.
Herein,
we
report
a
approach
to
generate
such
compounds
via
electroreductive
cleavage
the
C(sp3)-O
bond
activated
alcohols.
Under
established
reaction
conditions,
benzylic
radical
intermediates
were
efficiently
generated.
A
subsequent
radical-polar
crossover
generated
carbanions
that
further
reacted
with
N,N-dimethylformamide
form
various
tertiary
or
quaternary
carbon
centers.
feasibility
gram-scale
was
also
demonstrated.
This
operated
in
simple
undivided
cell,
which
avoids
use
any
transition
metal
catalysts,
toxic
gas,
and
reductants.
Organic & Biomolecular Chemistry,
Journal Year:
2023,
Volume and Issue:
21(45), P. 8989 - 8992
Published: Jan. 1, 2023
Owing
to
the
ubiquity
of
hydroxyl
group,
reductive
deoxygenation
alcohols
has
become
an
active
research
area.
The
classic
Barton-McCombie
reaction
suffers
from
a
tedious
two-step
procedure.
New
efficient
methods
have
been
developed,
but
they
some
limitations,
such
as
narrow
substrate
scope
and
use
moisture-sensitive
Lewis
acids.
In
this
work,
we
describe
Ph3P/ICH2CH2I-promoted
with
NaBH4.
process
is
applicable
benzyl,
allyl
propargyl
alcohols,
also
primary
secondary
demonstrating
wide
good
level
functional
group
tolerance.
This
protocol
features
convenient
operation
low
cost
all
reagents.