Chemical Society Reviews,
Год журнала:
2020,
Номер
49(19), С. 6833 - 6847
Опубликована: Янв. 1, 2020
Carbenes
are
important
intermediates
in
organic
chemistry
and
have
been
widely
applied
various
types
of
reactions,
ranging
from
cycloaddition
reactions
sigmatropic
rearrangements
to
C-H
functionalizations,
thus
allowing
the
rapid
construction
densely
functionalized
molecules.
Over
past
decades,
remarkable
progress
has
achieved
metal-catalyzed
carbene
transfer
reactions.
Nevertheless,
realizing
these
transformations
under
milder
and/or
greener
conditions
is
still
highly
desirable.
Only
recently,
visible
light-promoted
diazo
compounds
via
free
emerged
as
a
practical,
mild
powerful
tool.
In
this
tutorial
review,
we
summarize
latest
advances
area,
aiming
at
providing
clear
overview
on
reaction
design,
mechanistic
scenarios
potential
future
developments.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2021,
Номер
9(27), С. 8895 - 8918
Опубликована: Июнь 25, 2021
The
development
of
new
sustainable
reactions
and
protocols
is
essential
to
fulfill
the
growing
demands
every
branch
organic
chemistry
for
greener
synthetic
methodologies.
In
this
context,
use
visible
light
as
only
source
energy
highly
appealing.
Since
diazo
compounds
are
valuable
reagents
in
synthesis,
their
transformations
realized
a
manner
interest.
High
reactivity
easy
availability
make
them
suitable
solar-driven
transformations.
Indeed,
photochemical
have
recently
proven
alternative
transition
metal
catalysis.
perspective,
we
highlight
applications
these
under
irradiation,
particularly
focusing
on
recent
advancements.
These
include
generation
carbenes
radicals
which
involve
many
relevant
reactions,
[2+1]-cycloadditions,
X–H
C–H
insertions,
Wolff
rearrangement,
more.
Mechanistic
aspects
processes
briefly
addressed
give
readers
deeper
understanding
rules
underlying
photoreactivity
compounds.
We
conclude
by
emphasizing
significant
advancements
discussing
challenges
future
developments
photochemistry
reagents.
Chemistry - A European Journal,
Год журнала:
2020,
Номер
27(4), С. 1270 - 1281
Опубликована: Авг. 5, 2020
Abstract
Among
the
available
methods
to
increase
molecular
complexity,
sigmatropic
rearrangements
occupy
a
distinct
position
in
organic
synthesis.
Despite
being
known
for
over
century
rearrangement
reactions
of
ylides
via
carbene
transfer
reaction
have
only
recently
come
age.
Most
ylide
mediated
processes
involve
rupture
σ‐bond
and
formation
new
bond
between
π‐bond
negatively
charged
atom
followed
by
simultaneous
redistribution
π‐electrons.
This
minireview
describes
advances
this
research
area
made
recent
years,
which
now
opens
up
metal‐catalyzed
enantioselective
reactions,
metal‐free
photochemical
novel
pathways
that
can
be
accessed
intermediates.
Science,
Год журнала:
2021,
Номер
372(6538), С. 175 - 182
Опубликована: Апрель 9, 2021
Slipping
boron
into
alkyl
ethers
The
carbon–oxygen
bonds
that
hold
together
are
relatively
inert.
Lyu
et
al.
report
zinc
and
nickel
can
team
up
to
insert
between
the
carbon
oxygen
using
an
unusual
mechanism.
First,
a
dibromoborane
pries
open
bond
with
help
from
ion.
Next,
stitches
boron,
oxidation
of
metallic
starts
cycle
over
again.
Versatile
reactivity
at
inserted
center
then
add
carbons
original
ether
or
swap
out
for
nitrogen.
Science
,
this
issue
p.
175
Chemical Reviews,
Год журнала:
2024,
Номер
124(11), С. 7214 - 7261
Опубликована: Май 16, 2024
In
recent
years,
visible
light-induced
reactions
of
diazo
compounds
have
attracted
increasing
attention
in
organic
synthesis,
leading
to
improvement
existing
reactions,
as
well
the
discovery
unprecedented
transformations.
Thus,
photochemical
or
photocatalytic
generation
both
carbenes
and
radicals
provide
milder
tools
toward
these
key
intermediates
for
many
valuable
However,
vast
majority
transformations
represent
new
reactivity
modes
compounds,
which
are
achieved
by
decomposition
photoredox
catalysis.
particular,
use
a
redox-active
photocatalysts
opens
avenue
plethora
radical
reactions.
The
application
methods
led
inaccessible
classical
associated
with
metal
carbenes.
most
cases,
act
sources
but
can
also
serve
acceptors.
Importantly,
described
processes
operate
under
mild,
practical
conditions.
This
Review
describes
this
subfield
compound
chemistry,
particularly
focusing
on
advancements.
Chemical Communications,
Год журнала:
2023,
Номер
59(48), С. 7346 - 7360
Опубликована: Янв. 1, 2023
This
article
discusses
the
photochemistry
of
several
diazo
compounds
undergoing
visible
light-mediated
photolysis
to
generate
free
carbenes
(or
other
highly
reactive
intermediates),
which
can
be
sequentially
trapped
by
different
reacting
partners.
Chemical Communications,
Год журнала:
2023,
Номер
59(36), С. 5343 - 5364
Опубликована: Янв. 1, 2023
The
activation
and
transformation
of
organic
chemical
bonds
is
a
fundamental
scientific
problem.
In
the
past
several
decades,
C-S
bond
cleavage
for
construction
C-C
C-heteroatom
has
received
tremendous
attention
in
chemistry.
Although
significant
progress
been
made
field
transition
metal
strategies,
variety
novel
transition-metal-free
strategies
have
also
developed
using
halogenated
reagents,
oxidants,
acids,
bases.
Moreover,
photochemical
electrochemical
methods
to
achieve
organosulfur
compounds.
To
date,
however,
no
comprehensive
review
reported.
Therefore,
we
herein
provide
major
advances
compounds,
including
thioethers,
sulfoxides,
sulfones,
thioacetals,
sulfonium
salts,
sulfur
ylides.
Chemical Communications,
Год журнала:
2024,
Номер
60(16), С. 2125 - 2136
Опубликована: Янв. 1, 2024
In
this
feature
article,
we
focus
on
the
photochemical
strategy
for
construction
of
heterocyclic
skeletons,
specifically
highlighting
methods
that
employ
visible
light-promoted
carbene
transfer
reactions.
